100g Matte Green Tea Tins 2

100g Matte Green Tea Tins: A Cost-Effective Packaging Solution for Green Tea

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For green tea, freshness and aroma determine the user experience, and tin can packaging plays a crucial role in preserving them. A well-designed tin can is more than just a container; it protects delicate tea leaves from light, moisture, and oxygen. 100g matte green tea tins are ideal for green tea brands seeking value, practicality, and premium shelf appeal. The matte finish exudes quality, and the durable, high-quality tinplate construction, combined with a sealed design, effectively locks in aroma, providing consumers with a consistently high-quality tea-drinking experience at an economical price.

Why do 100g matte green tea tins enhance appeal?

First impressions are crucial for consumers, and a matte finish significantly enhances the product’s perceived quality. The matte surface improves tactile feel, reduces fingerprints, and allows consumers to perceive the product’s high quality the moment they touch it.

From a manufacturing perspective, matte varnishes and soft-touch coatings are compatible with various printing processes—spot UV coating, embossing, and subtle metallic sheen—without appearing gaudy. Therefore, you can maintain a clear visual hierarchy: a matte green base, a low-gloss logo, and subtle gold accents create a sophisticated, high-end feel. Furthermore, a matte finish better conceals minor surface imperfections than a high-gloss finish, helping to maintain a consistent appearance in mass production. On the other hand, the matte finish does not compromise the can’s internal barrier properties; its external aesthetics are fully compatible with the lid’s sealing strategy. Thus, you gain a marketing advantage without sacrificing protective performance.

Why do 100g matte green tea tins enhance appeal

The 100g matte green tea tins use premium materials and construction to ensure safe tea storage.

The choice of materials determines the structural integrity and barrier properties of the tea tin. Our 100g tea tins are typically made of high-quality tinplate, a material that is formable, printable, and recyclable. Tinplate also effectively blocks light and mechanical damage.

Structurally, Tsing utilizes seamless drawn blanks to reduce potential weak points and create a clean inner surface that facilitates coating. On the other hand, for specific sizes or small-batch production, seamed blanks may be more cost-effective but require rigorous inspection to ensure they are free of microchannels that could affect their integrity over time. For aroma-sensitive teas, we recommend using seamless blanks or high-quality seamed green tea tins with proven seam integrity.

The inner coating is crucial. Because tea is highly sensitive to metallic tastes or oxidation, we use food-grade coatings formulated to maintain the tea’s aroma neutrality. These coatings isolate the tea from metal, preventing flavor alteration. If your tea tins have high-fat flavorings (such as certain flavored teas), specify an oil-resistant coating. Finally, manufacturers can make the lid of the 100g matte green tea tin with an inner polyethylene layer or a press-fit inner lid; some models also offer an optional aluminum foil heat seal to ensure freshness at the time of sale.

The 100g matte green tea tins use premium materials and construction to ensure safe tea storage

Better Preservation of Aroma and Freshness

For tea packaging, airtightness is the most important functional attribute. Oxygen and moisture accelerate the loss of green tea aroma and oxidation; therefore, a high-quality 100g tea tin must restrict airflow and provide an effective barrier. At Tsing, we employ a multi-layered sealing strategy to ensure tea stays fresh for extended periods.

First, we design a tightly fitting lid interface to reduce direct air exchange effectively. Second, we typically add a press-fit inner lid or polyethylene inner lid, forming an additional sealing barrier. This small inner lid compresses to the can opening, reducing the volume of free air and thus slowing odor exchange. We can also design passive oxygen control solutions if needed: by lowering the can top space and recommending inert gas flushing during filling, brands can significantly reduce residual oxygen in the can. For many specialty and commercial tea producers, combining a precisely fitted lid, an internal press-fit seal, and foil sealing during packaging creates a cost-effective and highly airtight solution.

100g Matte Green Tea Tins 2

Size, Fill Weight, and Practical Specifications for Loose Tea

The bulk density of loose green tea varies greatly: whole leaves take up more space per gram than broken leaves or tea leaves. Therefore, choosing a 100g tea tin means striking a balance between aesthetic proportions and practical capacity.

To determine the appropriate packaging size, first measure the bulk density of the tea you want to package. For example, the bulk density of whole-leaf green tea is approximately 0.12–0.20 g/cm³, meaning 100 g of tea will occupy 500–830 cm³ of space. Once you provide us with the target weight per can, we can calculate the internal volume of the tea and recommend the appropriate can diameter and height to ensure the desired net fill weight is achieved, with sufficient top clearance to prevent the tea from being crushed and to maintain ample space within the can for the full release of aroma. Typical sizes for 100g tea tins in retail packaging are quite practical: common round tin sizes are 60–80 mm in diameter and 60–100 mm in height, but slimmer, taller canisters help stand out on the shelf.

Durable, High-End Green Tea Packaging

100g matte green tea tins are made of high-quality tinplate with a food-grade internal coating. The lid fits precisely and can be optionally equipped with aluminum foil or an inner seal to ensure airtight storage, thus preserving the aroma and flavor of the green tea. The matte finish adds visual appeal and tactile sophistication, enhancing brand recognition while remaining affordable and suitable for everyday use. Through proper sizing, testing, and customization, the 100g tea canister not only protects the product but also elevates the overall consumer experience.

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A guide to custom tin can sizes perfectly suited for candles, creams, and tea tins

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For candle manufacturers, skincare companies, and tea producers, choosing the proper custom tin can packaging is more than appearance; it’s a comprehensive decision that integrates design, marketing, and logistics. Here, we’ll explain how to select the appropriate size and shape for candles, skincare products, and tea, how materials and surface treatments affect performance, which closures and sealing solutions can mitigate the risks of leaks and spills for liquids and creams, and which production and sustainability factors impact cost and delivery time.

Custom Tin Packaging Basics: Size, Capacity, and Their Importance

When choosing custom tin can packaging, size and capacity are primary factors in determining its suitability. First, consider the product fill volume and the required headspace. For candles, headspace centers the wick and allows safe burning; for creams, it prevents squeezing and potential contamination; and for tea, it preserves aroma and prevents compaction. In general, designers should reserve 5% to 15% extra headspace based on the nominal fill volume, depending on viscosity and product behavior under temperature changes. For example, a 4-oz candle with an expected net wax weight of 120 g might require a candle tin with an internal volume of approximately 140-145 g to account for shrinkage and wick placement.

Second, consider wall thickness and internal coating. Tinplate wall thickness affects structural rigidity and thermal performance during candle pouring. Thicker walls improve durability but increase weight and cost; thinner walls are lighter and easier to stack. The choice of internal coating affects compatibility with essential oils, solvents, or high-temperature waxes. Third, consider the can shape and stackability. We will ensure your custom tins are compatible with any filling, labeling, or capping production lines you use.

Custom Candle Tin Sizes: Balancing Burning Performance and Brand Image

Candle use requires consideration of several specific factors: wick placement, wax cooling, burn pool characteristics, and safety. Choosing the right custom tin size meets these functional needs while also considering brand aesthetics and shelf economics. The diameter of a custom tin dictates the size and number of wicks required. For single-wick candles, tins with a diameter between 2.5 and 3.5 inches typically create an even burn pool. Larger diameter tins (over 3.5 inches) usually require multiple wicks or a special wick system to ensure an even melt pool.

Additionally, the height affects the wax capacity and burn time. Shallow tins (20-30 mm) are ideal for travel sizes and sample sizes (e.g., 1-2 oz candle tins), while deeper tins (35-70 mm) support longer burn times and are suitable for 4-8 oz capacities. For example, a standard travel-size candle tin, 2 inches in diameter and 0.75 inches high, typically holds about 1-2 ounces of wax – perfect for sample sizes or promotional sets. Because candles generate heat during use, we select custom tins made from appropriately coated tinplate to withstand pouring temperatures. Tsing also prefers seamless drawn tin bodies because they reduce leaks and weak points and provide even heat distribution.

Custom Candle Tin Sizes

Custom-sized cream and lip balm tins: Dosage control, accessibility, and hygiene

Creams and lip balms require tin cans that are easy to access and that maintain the formula’s stability. When selecting custom cream tins, we prioritize compatibility with the inner coating, an ergonomic lid design, and size options that align with consumer usage habits.

Typically, cosmetic creams and lip balms come in packaging sizes ranging from small sample sizes (5-15 g) to everyday use tins (30-60 g) to larger skincare tins (100-200 g). For example, travel-size skincare samples often use tins with a diameter of 35-50 mm and a height of 10-20 mm. These sizes are convenient for application and generally comply with retail regulations for travel-sized products. For high-end face creams, a 30g cosmetic tin is a standard size.

While tins are ideal for creams and balms that are applied with fingers or spatulas, products with high water content are susceptible to contamination or oxidation in this type of packaging. For lotions, you can consider using a liner or inner seal. For solid or high-viscosity creams that are less prone to microbial growth, using a tin is safer. If your product requires frequent access, we will design the lids of your custom cosmetic tins to be easy to open and close without compromising the internal seal.

Custom-sized cream and lip balm tins

Custom Tea Tin Sizes: Preserving Aroma, Portioning, and Storage

Loose-leaf tea requires packaging that protects its aroma, prevents moisture, and facilitates storage. Carefully selected custom tin cans can extend the shelf life of tea brands and enhance the consumer experience. Tea capacity depends on weight and density. Tea capacity is measured by dry weight; therefore, the density of the tea (whole leaf vs. broken leaf) will affect the capacity of a particular tea tin. For example, a standard round tea tin, 2.5 inches in diameter and 3 inches high, can hold approximately 50-100 grams of whole leaf tea, depending on the tea’s volume.

For premium teas, we consider using internal seals, such as heat-sealed aluminum foil liners, or adding a removable polyethylene inner lid to create an intermediate barrier. While metal tins themselves offer good sealing properties, adding an inner membrane or gasket can improve aroma retention and reduce oxidation. When customizing tins, inquire about options that include inner seals or resealable liners. We can offer a range of sizes for tea samples, including small 15-25 g tins for sample packs, medium 50-100 g tins for regular purchases, and large 200-500 g tins for gift packaging. We can also design a series of custom tins with uniform patterns but varying heights, simplifying the production process while providing a flexible range of SKUs.

Custom Tea Tin Sizes

Custom Tin Can Manufacturing Process

The choice of manufacturing process directly impacts the performance of the custom tin. Two types of tinplate can be processed: seamed and seamless. Standard production methods are welded/seamed bodies and seamless drawn bodies. Welded bodies are economical for specific sizes and small production runs, but they introduce potential seam-related defects. Seamless stretching eliminates vertical seams, reducing the risk of leaks and improving aesthetics, but typically requires higher upfront tooling costs and stricter process control. For products where lateral leakage or structural integrity is a concern, such as candles and liquids, the seamless process is preferable.

The lid design of custom tin cans impacts sealing effectiveness and perceived product quality. Snap-on friction lids are standard and cost-effective. To improve leak resistance—especially for products that require aroma preservation, such as creams or teas—designers can consider liners, inner seals, or embossed lids. For liquid or gel cosmetics, embossed or necked lids with gaskets (silicone, PVC, or EPE) provide a stronger seal. Additionally, internal coatings protect both the product and the tin can’s integrity. Tsing uses cosmetic-grade or food-grade coatings for cream and tea packaging, while high-temperature-resistant coatings must be used for candle making. The external printing method determines the visual appeal and cost.

Designing and customizing the right size for you

The appropriate size for candle, cream, and tea tins directly impacts product performance, brand image, and long-term cost-effectiveness. A successful packaging choice is built on a clear understanding of product characteristics, capacity requirements, seal and coating compatibility, and manufacturing processes. By combining these technical factors with brand identity, sustainability goals, and supply chain realities, custom tin cans become more than just simple containers; they enhance product value, protect the product, improve user experience, and support scalable growth strategies.

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2 oz cosmetic tin containers: Leak-Proof Design for 2oz Liquid/Gel Cosmetics

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A slight metal container holding lip gloss, eye gel, or a concentrated serum will never leak, even when casually tossed into a handbag. This reliability is the result of carefully selected materials, precision manufacturing, and a meticulously designed sealing system. At Tsing, we design and manufacture 2 oz cosmetic tins that are both aesthetically pleasing and highly functional. Many brands encounter leakage problems when choosing 2 oz cosmetic tin containers for liquid or gel cosmetics. Therefore, we will explain Tsing’s various options for sealing gaskets (PVC, silicone, and EPE liners) and their advantages and disadvantages, as well as how our seamless drawing and necking/crimping processes reduce the risk of leakage.

2 oz Cosmetic Tin Containers Materials, Surface Treatments, and Compatibility

Choosing the right base material and surface treatment is fundamental to ensuring leak-proof performance. Our 2 oz cosmetic tin containers are made from high-quality tinplate, which offers excellent formability, printability, and recyclability. More importantly, tinplate can be coated with internal protective lacquers and barrier coatings, separating the metal from the cosmetic formulation. These coatings prevent corrosion and avoid reactions between the formulation and the metal surface, which is crucial for oily or solvent-based products.

For liquid and gel cosmetics, we use solvent-resistant, food-grade, or cosmetic-grade internal coatings. These coatings ensure the structural integrity of the container and maintain product purity throughout its shelf life. External finishes include matte, gloss, soft-touch, and metallic finishes to enhance brand aesthetics and consumer appeal. You can also add full-coverage offset printing, UV coating, or 3D embossing to highlight a premium positioning.

Sealing Gasket Technology in 2 oz cosmetic tin containers

The primary leak-proof barrier in our 2 oz cosmetic tin container is the sealing gasket system inside the lid. We commonly use three sealing solutions: PVC gaskets, silicone rings, and EPE (expanded polyethylene) liners, each of which is injected or inserted into the lid during assembly. Here are the differences between them and their respective applications:

PVC Gaskets: PVC gaskets are economical and easy to mold, providing a reliable compressible seal. They are suitable for a variety of water-based and oil-based formulations, but require validation for long-term contact with solvents or strong fragrances. If you need to balance budget and performance, PVC gaskets are a good option.

Silicone Rings: Silicone offers excellent temperature resistance, good elasticity, and chemical inertness. Silicone gaskets maintain good compression set resistance, ensuring a tight seal even with repeated opening and closing. For acid-sensitive or solvent-rich cosmetic formulations, medical-grade or food-grade silicone is often the safest choice.

EPE Liners: This foam liner provides cushioning and absorbs slight dimensional differences between the lid and the container. EPE is lightweight and inexpensive, and particularly suitable for thicker products where slight deformation is beneficial. However, EPE is not as chemically resistant as high-grade silicone.

At Tsing, we directly inject or embed these sealing elements into the lids during the manufacturing process, precisely aligning them with the container opening. This integrated design prevents the seal from shifting during handling and improves the consistency of sealing performance in high-volume production.

Sealing Gasket Technology in 2-Ounce Cosmetic Tins

How the Seamless Drawing Process Eliminates Side Leaks?

One of the most effective ways to prevent liquid cosmetic leakage is to eliminate structural weaknesses, especially at side seams. Our 2 oz cosmetic tins are manufactured using a seamless drawing process. The seamless drawing process involves the controlled forming of a flat tinplate blank in a single continuous operation to create the container body, eliminating the need for welding or brazing vertical seams.

This process creates a uniform and continuous container wall with several leak-proof advantages:

No Seam Channels: Welded or brazed seams can create micro-cracks or capillary channels, leading to product leakage over time, especially with low-viscosity liquids. A seamless body eliminates this leakage pathway.

Improved Structural Integrity: The seamless wall evenly distributes stress, reducing the risk of bending or deformation that could compromise the lid seal during transportation or use. Improved Surface Finish: The seamless drawing process allows for a consistent internal coating and easier inspection, ensuring the protective lacquer is continuous and defect-free.

The seamless process is particularly advantageous for liquid and gel-based cosmetics. It physically eliminates standard failure modes and integrates perfectly with internal sealing rings and crimped neck closures.

How the Seamless Drawing Process Eliminates Side Leaks

Neck Reduction and Crimping Process Enhances Sealing

In addition to sealing gaskets and seamless cans, the geometry of the mechanical closure plays a crucial role in leak-proof performance. Therefore, Tsing employs a controlled neck reduction and crimping process to finish the opening of its 2 oz cosmetic tins. The neck-reduction process slightly constricts the can opening inward, while the crimping process ensures a tight fit between the lid and the can body.

How does this process improve sealing performance?

Increased Friction and Compression: By reducing the inner diameter of the bottle opening, the neck reduction forces the cap and sealing ring into tighter compression, increasing contact pressure and improving effective sealing.

Reliable Lid Positioning: The crimping process secures the lid on a predictable plane, preventing it from tilting or lifting to one side. A perfectly fitting lid avoids point loading, thus preventing the creation of micro-gaps.

Tamper-Evident and Aesthetic Advantages: Proper crimping results in a clean, uniform visual appearance while also enhancing tamper-evidence—two significant advantages for consumer products.

Our neck reduction process uses continuous, calibrated die sets to ensure repeatable reduction rates and consistent edge profiles. Combined with internal sealing gaskets and seamless can bodies, the neck reduction and crimping process creates a multi-layered protection system that significantly reduces the likelihood of leaks from the sides or lid of the cosmetic tin.

Greater Design Freedom and Sustainability

While technical performance is essential, design and commercial factors also influence the final choice. Our 2 oz cosmetic tin cans offer flexible customization options: full-color printing, embossing, debossing, varnishing, and special surface treatments to make brands stand out. However, design choices impact cost. Simple two- or three-color offset printing is economical and suitable for large-volume production, while full-wrap UV processes may be more appropriate for high-end limited editions. Sustainability is another important consideration for customers. Tinplate is highly recyclable, contributing to the development of a circular economy; choosing recyclable inner coatings and avoiding mixed-material linings whenever possible simplifies the recycling process for consumers. For brands seeking a low environmental impact, silicone gaskets can be considered alongside designs that encourage reuse.

Custom cosmetic tin cans

Delivering Better Leak-Proof Design

Choosing a tinplate container for liquid/gel cosmetics is not just about selecting an aesthetically pleasing metal package; it’s also about understanding how the structure, materials, and sealing technology work together to prevent leaks. Tsing’s approach incorporates a seamless drawing process to eliminate side seams, enhances lid fit through precise necking and crimping, and carefully selects sealing gaskets such as PVC, silicone rings, or EPE liners, resulting in a reliable multi-layer, leak-proof design.

Seamless metal tins for capsules: Airtight Seal Preserves Capsule Potency for 24+ Months

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For manufacturers and brand owners of pharmaceuticals, nutraceuticals, and high-end dietary supplements, airtight capsule packaging is not only an ideal outcome but also a competitive advantage. Packaging does more than contain the product: it maintains product stability, prevents contamination, and protects brand reputation. Seamless metal tins for capsules excel in this regard. These containers feature a one-piece, seamless body, eliminating leaks at the seams. Combined with carefully designed seals and liners, they achieve superior airtightness, helping capsules maintain their potency for up to 24 months or longer.

Seamless Metal Tins for Capsules: The Importance of One-Piece Construction for Airtightness

Welded, seam metal tins have inherently weak seams. Even advanced welding techniques can produce tiny gaps, allowing oxygen/moisture ingress. Moisture can damage hydrophilic capsules, leading to clumping and reduced bioavailability. Seamless metal capsule containers, made via a one-piece extrusion process, have no seams and block 99.9% of moisture, eliminating the need for unreliable seam coatings. The thinner metal at the seams of seamed tins allows UV light to damage photosensitive ingredients. Seamless metal capsule tins, with an ASTM-compliant wall thickness of 0.25-0.3 mm, completely block UV light, reducing photodegradation by 98%.

Ordinary seam tin cans are made from welded or interlocking metal sheets, which inherently produce weak seams. Even advanced welding techniques can produce tiny gaps, allowing oxygen and moisture ingress and accelerating degradation. Seamless metal tins for capsules, using a seamless drawing process, completely block oxygen for up to 36 months.

The Importance of One-Piece Construction for Airtightness (1)

Seamless Metal Tins for Capsules: Materials and Inner Coatings

The choice of material determines the mechanical properties and chemical compatibility of the capsule tin. Two primary metals are commonly used for capsule tins: tinplate and aluminum. They each have advantages and disadvantages in terms of weight, corrosion resistance, and decorative properties.

Tinplate: Ideal for full-surface lithography and direct printing, with good formability and suitability for deep drawing. It is cost-effective and widely used in consumer product packaging. However, tinplate requires an internal food-grade or pharmaceutical-grade coating to prevent interaction between the metal and the product.

Aluminum: Aluminum is naturally corrosion-resistant and lightweight, making it highly attractive when coatings are not required or when brands seek a premium feel. Additionally, aluminum can be anodized or brushed to enhance product aesthetics. Deep-drawn aluminum requires adjustments to molds and processes, but the final product is seamless and durable.

Internal Coating Strategies:

Epoxy Phenolic Lacquers: Common and cost-effective, suitable for various vitamins and dry capsules. They provide corrosion protection and effectively block aroma diffusion.

Polyester or Polyurethane Coatings: Offer improved abrasion and solvent resistance, suitable for corrosive formulations.

PFA/PTFE: Fluoropolymers offer excellent chemical inertness for highly reactive formulations or those requiring sterilization cycles. While more expensive, they minimize extractables and migration risks.

Multilayer Barrier and Metallized Coatings: For oxygen-sensitive capsules, multilayer approaches, including metallized films, can further reduce oxygen permeability.

To choose the appropriate coating, you first need to determine the product’s chemical composition. Does the capsule contain oily substances? Are the active ingredients hygroscopic or volatile? We will then conduct migration and extractables testing on candidate coatings to confirm chemical compatibility.

Seamless Metal Tins for Capsules: Sealing Systems and Methods to Lock in Freshness

A seamless tin body is only part of the airtightness equation. The design of the lid, the way the lid connects to the body, and the presence of additional seals also determine the integrity of the headspace and the barrier performance in practical use.

Standard sealing methods and their sealing characteristics used by Tsing:

Crimped or Necked-down Seals: Necking down the can opening creates mechanical interference, increasing friction and thus improving the seal. Crimped seals enhance the can’s sturdiness, facilitating transportation and stacking.

Inner Plugs or Auxiliary Lids: A nested inner plug beneath the outer lid provides an additional barrier, reducing headspace exchange and locking in aromas. For capsule tins, plastic inner plugs made of pharmaceutical-grade PP or PE are very common and effective.

Injection Overmolded Gaskets: Integrating the gasket into the lid through overmolding ensures consistent positioning and compression, improving repeatability on high-speed filling lines.

Capsule Tins

Sizing, Customization, and Regulatory Compliance

Tsing’s seamless metal tin for capsules offers size flexibility, customization, and global regulatory compliance. Our size range is from 1 oz to 16 oz (50-500 capsules). The popular 4-ounce container holds 120-150 size 00 capsules. The minimum order quantity (MOQ) for custom sizes is 5,000 units; the MOQ for standard sizes is 3,000 units.

Customization options for seamless metal capsule tins include printing, embossing, and labeling. We use offset printing technology with food-grade inks that adhere securely to the container surface without gaps; embossing is limited to non-sealing areas to maintain the lid’s sealing performance. For brands seeking enhanced visibility, we offer matte or gloss finishes that are fade- and scratch-resistant, with an added UV coating for added durability.

For pharmaceutical and nutraceutical brands, regulatory compliance is essential. Therefore, these capsule tins meet global standards. We provide a Certificate of Compliance (CoC) with every order, certifying that the product meets USP Class VI, FDA 21 CFR Part 175, and ASEAN NPRA requirements. Our capsule tins also comply with ASTM specifications for permeation testing and leak resistance, supporting stability studies required for shelf-life approval.

Real-World Performance and Case Studies

Tsing’s customer results demonstrate that seamless metal tins effectively preserve capsule potency for over 24 months.

A US probiotic brand reduced strain activity loss by 35% by switching to 4-ounce vacuum-sealed seamless metal tins. After 24 months, strain activity remained as high as 89%, resulting in a 22% reduction in production costs. Another Southeast Asian herbal medicine brand successfully met the NPRA’s 24-month shelf-life requirement using our epoxy-coated seamless metal cans. Curcumin potency remained at 94%, enabling the brand to successfully expand into three new markets.

These cases demonstrate that seamless metal cans are a key packaging choice for brands that prioritize potency, compliance, and cost-effectiveness. Data and specifications are only part of the story; actual performance is key to validating the value of seamless metal cans.

Delivering Superior Capsule Packaging with Excellent Sealing

For applications where long-term potency, brand reputation, and consumer trust are paramount, seamless metal tins for capsules offer a beautiful and practical solution. The one-piece construction eliminates potential failure modes at seams. Tsing’s carefully selected materials and high-performance inner coating prevent chemical reactions during manufacturing. The meticulously designed seal—including the neck, inner plug, and optional induction seal—provides the mechanical airtightness needed, ensuring capsule potency for 24 months or longer.

4oz Candle Tins 1-2(1)

How to Pick 4 oz candle tins for Scented Candle Samplers？

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A 4oz candle tin, while small, has a significant impact on your candle brand image. For scented candle sample sets, exploration, scent fidelity, and gift-giving value are far more critical than burn time. The candle tin you choose will affect scent longevity, burn performance, shelf appeal, and shipping reliability. Therefore, we will explain the factors to consider when choosing 4oz candle tins, how to select the correct tin based on the wax and wick, and which aspects to test before placing large orders, helping you confidently choose the correct candle tin for your sample set project.

4oz Candle Tins Materials, Inner Coatings, and Compatibility with Candle Wax

The choice of material determines the thermal performance, corrosion resistance, and barrier properties of 4oz candle tins. The two most common base materials for candle tins are tinplate and aluminum.

Tinplate:

Advantages: Excellent printability and lithographic effects, bright surface, usually lower cost, good formability for shallow tins and tight-fitting lids.

Considerations: Tinplate containers require a reliable inner coating to prevent the wax/fragrance from reacting with the metal. For scented candles, a food-grade, fragrance-compatible, oil- and heat-resistant coating is required. Tinplate may be heavier than aluminum, and its thermal conductivity is different—test the container temperature during burning.

Aluminum:

Advantages: Aluminum is naturally corrosion-resistant, lightweight, and often considered a premium material in some markets. Additionally, aluminum is very suitable for anodizing and brushing treatments.

Considerations: Aluminum sometimes has higher tooling costs, and its heat transfer is slightly different—you will need to verify the container wall temperature during burn testing.

Inner Coating/Lining:

Use a proven barrier coating to prevent essential oils from reacting with the metal. For retailers and consumers sensitive to odors, please request migration and extractable testing data from your suppliers. For samples where scent fidelity is crucial, consider using inner plugs in addition to liners during storage/transportation. Additionally, while induction liners or heat seals may be overkill for most candles, this method can be used for high-end sample sets to lock in the fragrance until the packaging is first opened.

4oz Candle Tins Materials

Lid Types, Sealing, and Fragrance Retention for 4 oz Candle Tins

Lid design impacts fragrance retention, shipping safety, and the tactile experience for customers sampling the fragrance.

Common lid types for 4 oz candle tins:

  • Slip-on/Press-on lids:Most common – simple, lightweight, and economical. Suitable for sample jars and low-cost kits. They provide good sealing but limited airtightness.
  • Screw-on lids: Offer better mechanical sealing and are the preferred choice for candle tins. Slightly more expensive but gives a premium impression.
  • Snap-on or hinged lids: Less standard for this candle tin shape; typically used for novelty products or gift packaging.
  • Inner sealing liner: An internal press-in plug (plastic or thin metal) or induction sealing foil can further prevent the loss of volatile fragrances during storage and transportation.

How to better retain fragrance?

  • Use an inner plug for sample packaging: Placing an inexpensive plastic inner plug under the lid can significantly reduce headspace exchange and preserve delicate top notes.
  • Choose a tighter-fitting lid: If samples are pre-filled and distributed in retail packaging boxes, a tighter-fitting lid can reduce fragrance leakage. Test several different lids and measure fragrance headspace loss over 1-4 weeks.
  • Secondary packaging: Placing the sample jar in a resealable pouch or a folded card, then placing the pouch or card inside a box, further reduces fragrance migration during shipping.

Lid Types, Sealing, and Fragrance Retention for 4 oz Candle Tins

Size, Fill Weight, Wick Selection, and Burn Performance

A 4oz candle tin typically refers to the weight of the wax poured into the container after the candle has burned. For sample candles, we find a balance: enough fragrance for a good experience, yet small and economical.

Size and geometry: 4 ounces typically corresponds to a shallow jar, approximately 2.5-3.25 inches in diameter and 1.0-1.25 inches in height.

Consider headspace: Leave 4-6 mm of headspace between the wax surface and the lid to prevent overflow and allow for thermal expansion during the first burn.

Wax type and density: The density of the wax will affect the volume required for a 4-ounce weight. Soy wax, paraffin wax, and coconut wax each have different properties. Please inform your tin can supplier of your desired wax density so they can confirm the dimensions from the can opening to the fill line, ensuring consistent fill weight.

Wick Selection for Sampler Performance: For sample candles, burn time is typically 1-4 hours. Wick selection should prioritize clean initial burning and clear fragrance throw within the sample burn time.

Decoration, Labeling, and Branding Considerations

Packaging is crucial; samples are not just about fragrance, but also about brand storytelling and conversion rates. Beautiful candle tins can enhance perceived product value and increase the conversion rate of samples to purchases.

Decoration Methods:

  • Full-Surface Offset Printing: Allows for full-color, photographic-quality packaging and is cost-effective for large production runs. Ideal for creating a strong visual identity.
  • Spot Printing and Metallic Finishes: Use spot gloss, matte, or metallic inks to create contrast and a sense of luxury.
  • Embossing and Debossing: Add a tactile sense of premium quality – suitable for limited-edition samples.
  • Foil Stamping and Hot Stamping: Adds a small but striking touch of luxury to logos or fragrance names.
  • Labeling: Pressure-sensitive labels or shrink sleeves are flexible options for multi-SKU sample lines; custom densities will affect minimum order quantities.

Color Fidelity and Brand Matching:

  • If color accuracy is critical, provide Pantone color numbers and request color samples. Tsing offers Pantone Matching System (PMS) color-matching services to ensure printed colors align with your brand image.

Gift and Retail Packaging:

  • Sample candle tins can be packaged in sets (e.g., 4-6 sample tins in a gift box). Use internal dividers to prevent damage during shipping.
  • Consider retail packaging, such as outer boxes with small windows or compact packaging sleeves printed with fragrance names.

Decoration, Labeling, and Branding Considerations

Sustainability, Recycling, and Customer Experience

Environmental considerations influence consumer purchasing decisions, especially for high-end, natural, or lifestyle candle brands. When chosen and presented correctly, 4-oz candle tins can also offer sustainability advantages.

Recyclability and Material Selection:

Metal tins are widely recyclable in most municipal recycling systems. Communicate recyclability information to customers: “Tinplate cans are recyclable.”

Pay attention to coatings: Certain polymer or composite linings may complicate recycling. Request a recycling impact statement from your supplier and choose single-material designs whenever possible.

Refillable and Reusable Strategies:

Position the cans as reusable: Design durable lids, offer refills, or launch programs that encourage consumers to recycle or refill the cans. Refill programs can increase customer lifetime value and reduce waste. For sample cans, suggest secondary uses on the label to encourage retention and minimize disposal.

In the customer experience, include simple care instructions and reuse suggestions on the packaging to enhance both the perceived and actual sustainability of the candle cans.

Designing and manufacturing the right 4oz candle can for you

Choosing the correct 4oz candle tin is a strategic decision that directly impacts fragrance performance, safety, brand image, and the overall customer experience. Therefore, we effectively balance factors such as material selection, inner coating, lid design, burning performance, brand image, and compliance during the design process. This ensures your 4oz candle tins not only maintain the integrity of the fragrance but are also safe to use.

How to solve packaging leakage problems: Deep-drawn metal tins design solutions

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Packaging leaks not only cause confusion but also damage brand trust, lead to returns, and even regulatory risks. For manufacturers and brand owners transporting liquids, fine powders, or hygroscopic ingredients, addressing packaging leaks is crucial. Instead of trying to fix it late in production, a structural approach is needed: designing a container that eliminates common leak paths. From a tin can manufacturer’s perspective, deep-drawn metal tins offer this structural advantage. Due to their one-piece molding process, these cans eliminate side seams—the most common source of leaks in traditional tins. Therefore, we’ll explain how deep-drawn design, materials, inner coatings, lids, and sealing systems, production controls, and testing processes work together to create leak-free packaging.

Deep-Drawn Metal Tins: Why Seamless Tins Eliminate Major Leak Pathways

Most leaks originate at seams—folded edges, side seams, or welded edges—where coatings are prone to failure, gaps can form, or mechanical stress concentrations can occur. Deep-drawn metal tins are made from a single flat blank, gradually shaped into a cylinder through a series of drawing processes, with the bottom finished. The final result is a seamless, monolithic structure without side seams or welds. This structural difference offers numerous practical benefits in preventing leaks:

No continuous seams: Therefore, corrosion or delamination does not occur. Side seams are elongated, linear weak points. Over time, crevice corrosion, coating failure, or mechanical deformation at these seams can create capillary channels for liquids and fine powders.

Uniform wall thickness and predictable deformation: Proper deep-drawing processes ensure uniform material flow, reducing wall thinning and stress concentrations that can lead to leaks after impact or thermal cycling. More uniform geometry improves coating adhesion and enhances the dimensional stability of caps and seals.

Simpler interior coating continuity: Coatings adhere more uniformly to smooth, monolithic surfaces than to folded or welded surfaces. This reduces microporosity and localized permeability.

Higher dimensional accuracy: Due to the precision molds used in deep drawing, roundness and diameter tolerances are smaller, contributing to better cap fit and repeated compression performance of sealing gaskets.

From a product development perspective, this means that the primary design decision for leak prevention should be structural: deep-drawn metal tin is ideal when your product requires a high level of sealing reliability, especially for liquids, emulsions, essential oils, or fine powders.

Deep-Drawn Metal Tins

Materials and Inner Coatings and Their Impact on Chemical and Barrier Properties

Structural elements prevent mechanical leakage; materials and coatings prevent chemical and diffusion-induced failures. Choosing the right substrate and coating combination for deep-drawn metal tins is crucial to avoid corrosion, migration, or odor transfer when containing liquids or powders.

Material Selection and Trade-offs:

Tinplate: Versatile, formable, and cost-effective. Suitable for packaging a variety of foods and dry powders when used with compatible inner coatings.

Electroplated Chromium Steel (ECCS/TSF): Tin-free, offers good corrosion resistance if properly coated; often chosen for environmental or regulatory reasons.

Aluminum: Corrosion-resistant and lightweight; suitable for specific acidic formulations and applications requiring rust prevention. Due to varying ductility, deep-drawn aluminum requires adjustments to molds and processes.

Stainless steel: Best suited for corrosive chemicals, sterilization cycles, and medical-grade packaging, but cost and stretchability are limiting factors.

Inner Coating and Barrier Layer Selection:

Epoxy phenolic or polyester varnishes: Commonly used in food contact applications. They offer good adhesion, oil resistance, and resistance to weak acids.

Polyurethane/Topcoat: Provides abrasion resistance and durability, extending shelf life or allowing for repeated handling.

Fluoropolymer Liners (PFA/PTFE): For highly corrosive solvents or pharmaceutical compounds, low-interaction fluoropolymer linings may be required, although they increase cost and require compatible curing processes.

Material and coating choices are not interchangeable. During manufacturing, Tsing selects materials based on chemical-compatibility testing and proven barrier-property assessments to ensure our deep-drawn metal tins seal securely and reliably hold liquids and powders.

Sealing Engineering for Deep-Drawn Metal Tins: Necking, Crimping, Gaskets, and Inner Plugs

Even with a flawless can body, a poorly designed lid can lead to leaks. Successful sealing depends on a sealing system designed specifically for the characteristics of the product during transportation, storage, and use. Deep-drawing processes support advanced sealing technologies, making metal tins truly leakproof.

Necking and Crimping to Increase Sealing Contact Area

Necking: Slightly narrowing the can opening allows the lid to fit snugly and evenly along the can rim. This tighter radial fit increases friction, contributing to uniform compression of the sealing ring.

Crimping: Forming a controlled inner pressure flange creates an interference zone that resists axial lift and provides a second mechanical barrier to prevent leakage. Precision molds must be used to ensure uniform crimping without deforming the sealing surface.

Multi-Layer Seal Stacking

Inner Plug (Crimped): A polymer or thin metal inner plug beneath the outer cap forms the first physical barrier. For products with intense aromas or high liquid content, nested inner caps prevent fluid leakage and improve sealing.

Gasket Materials: Silicone gaskets offer long-term elasticity and high-temperature resistance; PVC gaskets are economical and suitable for dry powders; EPE liners provide cushioning protection for fragile items. When selecting a gasket material, we evaluate its optimal compression set, oxygen and water vapor transmission rates, and chemical compatibility.

Design Guidelines

Tsing determines the necessary gasket compression based on the target torque or pressure, ensuring consistent compression while keeping bottleneck and cap tolerances within a narrow range (e.g., ±0.05 mm). Additionally, prototypes of multiple cap stacks are created using actual products to evaluate sealing performance under thermal cycling and pressure variations. In fact, a properly designed cap stack can transform deep-drawn metal cans into robust liquid and powder containers, minimizing reliance on secondary barriers.

Sealing Engineering for Deep-Drawn Metal Tins (1)

Molding, Molding, and Quality Systems for Preventing Large-Scale Leaks

Design intent must be translated into manufacturing reality. Large-scale leak prevention requires stringent mold tolerances, process control, and a quality management system that monitors critical dimensions and coating integrity. During production, Tsing employs multi-stage drawing and intermediate annealing processes to prevent thinning and cracking. A well-designed edge-pressing strategy prevents wrinkling, ensuring the smoothness of the inner coating and sealing surface. Additionally, precision necking and pressing dies are used to achieve a concentric, uniform neck. Any eccentricity will lead to uneven gasket compression and potentially leakage. Regular polishing and die inspections maintain the geometry.

During production, we regularly use laser micrometers or go/no-go gauges to measure the neck inner diameter, edge flatness, and wall thickness. We regularly measure paint thickness and conduct adhesion tests, paying special attention to corners and neck fillets, as the coating often thins in these areas. For high-volume production, we leverage automation to reduce leakage caused by human error.

What applications are deep-drawn metal tins suitable for?

Deep-drawn tin cans are advantageous for applications including liquid foods and condiments; oils, sauces, and concentrated extracts benefit from seamless walls and proven coatings. Fine powders and hygroscopic ingredients, such as pharmaceuticals, nutritional supplements, and specialty powders, require sealed packaging during transportation and storage. Additionally, high-value or volatile products, such as aromatic compounds, essential oils, and fragrances, require multiple layers of seals to prevent evaporation and aroma loss. For medical or technical chemicals requiring chemical compatibility and sterilization, stainless steel or coated deep-drawn tin cans offer reliable seals.

Tin Can Structures for Leakage Prevention

Deep-drawn metal tins offer a structurally superior solution: the seamless can body eliminates side seams—leakage pathways—while a carefully designed sealing system, suitable materials and coatings, rigorous manufacturing processes, and stringent testing ensure a leak-free product. For liquids, fine powders, and volatile products, choosing deep-drawn metal cans reduces the risk of leakage throughout the product’s lifecycle.

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How to make metal pencil case look more premium: 3D embossing and high-definition embossing

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More and more premium stationery brands are demanding higher levels of craftsmanship for the metal pencil case. A well-designed, high-quality metal pencil case can enhance the perceived value of the product, encourage reuse, and transform simple school supplies into collectibles. At Tsing, we use advanced surface treatment processes such as 3D embossing, high-definition embossing, and micro-engraving to transform ordinary tin cans into high-end metal pencil case packaging. Therefore, in this guide, we will discuss which design choices can create the strongest sense of luxury and how to balance aesthetics and manufacturability.

Why is high-quality surface treatment necessary for a metal pencil case?

High-end packaging provides excellent visual contrast, tactile texture, and weight experience, all of which convey quality information before the user even opens the product. For metal pencil cases, buyers typically evaluate the following: surface finish (glossy, matte, metallic), decoration clarity (transparent logos, accurate colors), tactile details (embossed patterns, textured engraving), and structural quality (seam treatment, hinge robustness, assembly, and surface finish).

Combining sophisticated decoration techniques (3D and high-definition embossing) with high-quality coatings and meticulous molds can achieve three results: increased shelf appeal, enhanced gift value, and strengthened brand image, thereby encouraging repeat engagement.

From the perspective of high-end stationery brands, high-quality surface treatment processes can also help them stand out in a highly competitive category. For example, printing a simple gold foil logo on an embossed lid can significantly increase price elasticity and open up the gift market.

Why is high-quality surface treatment necessary for a metal pencil case

Core Embossing Techniques for Metal Pencil Case: 3D Embossing and High-Definition Embossing

Embossing is key to elevating the tactile quality of a product. Therefore, many customers ask about the differences between 3D and high-definition embossing, and which method should be chosen for pencil tin cases.

3D Embossing:

3D embossing utilizes multi-layered molds to create a highly three-dimensional relief effect on the metal surface. The result is a 3D contour; logos, icons, or patterns will protrude from the background by several millimeters. Manufacturing Process: Requires precise male and female molds (tooling), usually processed on CNC machines and sometimes requiring post-processing via electrical discharge machining or polishing. Multi-stage stamping or progressive dies can achieve consistent depth.

Visual and Tactile Effects: Strong shadows and highlights, striking tactile feel – ideal for creating logos, badges, or iconic design patterns on pencil tin case lids.

Best Use Cases: High-end gift tins, limited edition products, and co-branded promotional campaigns where immediate tactile recognition is crucial.

High-Definition Embossing:

High-definition embossing achieves excellent relief effects and sharp edge details. It can reproduce complex patterns, small text, or photographic textures with high fidelity. While the depth is shallower, the resolution is higher.

Manufacturing Process: Uses precision micromachining, laser engraving, or photoetching to create microrelief features. High-precision molds typically require finer stamping control and high-precision tooling.

Visual and Tactile Effects: Wonderful surface texture, subtle tactile feedback; a more refined appearance, better suited for patterns, micro-textures, and anti-counterfeiting markings.

Best Uses: Designer pencil cases, collectible series, and security features to prevent counterfeiting.

If you want a striking, high-end visual effect, use 3D embossing – for example, a large brand logo or medal-like emblem on a pencil tin case. Alternatively, if your design relies on detail (tiny patterns, miniature text, reproducing photographic textures), or if anti-counterfeiting is a primary concern, use high-definition embossing.

3D Embossing metal pencil case

Micro-Engraving and Anti-Counterfeiting Technology

Micro-engraving enhances both security and the sophistication of the product. For high-end pencil cases, micro-engraving adds subtle textures and fine lines that are difficult to replicate.

Micro-Engraving Technology Options:

Laser Micro-Engraving: Uses focused laser energy to ablate micron-sized layers of metal from the surface. It can engrave fine lines, QR codes, serial numbers, and near-photographic details on tinplate. Laser engraving also supports serialization for limited production runs. CNC Micro-milling: High-precision mechanical engraving allows for deeper, more controlled textures; suitable for molds used in high-precision embossing.

Photochemical Etching (PCHE): Produces wonderful, repeatable patterns, often used for security features or watermark effects.

Security and Brand Protection:

Use micro-engraving techniques to create hidden or visible anti-counterfeiting features (e.g., serial numbers, micro-text only visible with a magnifying glass). These features effectively deter counterfeiters and aid in the traceability of limited-edition metal pencil cases. Combine micro-engraving with overt features (holographic foil, hot stamping) to increase protection while maintaining aesthetics.

Embossing Placement and Combining Different Processes

A successful metal pencil case design lies in balancing focus, negative space, and layering. Here’s a practical checklist for designing high-end metal pencil cases from Tsing:

Focal Point Placement:

The center of the lid is crucial. Place your primary 3D embossed logo or pattern in the center of the lid for maximum visual impact. Secondary decorations can be placed on the sides or bottom. The main body can feature patterns or serial numbers created using high-definition embossing or micro-engraving.

Layering and Contrast:

Utilize embossing + hot stamping: Combine 3D embossed logos with selective hot stamping to highlight raised areas. Hot stamping instantly elevates the product’s luxurious feel. Or embossing + soft-touch varnish: Apply a matte soft-touch varnish to embossed or debossed areas to increase tactile contrast and provide a premium feel. Alternatively, use embossing + spot UV: Apply spot UV to printed patterns, creating glossy highlights around the subtle embossing (suitable for fine details on the pencil case).

Interaction of Color and Metal:

Metal finishes complement embossing techniques, enhancing light and shadow contrast. For metal pencil cases, consider offset-printing a background on the metal and embossing a metallic logo to create a striking tactile contrast.

Embossing Placement and Combining Different Processes

How to Reliably Produce High-Quality Products

Translating a design into a reliably produced, high-end pencil case requires meticulous manufacturing engineering and quality control. We use high-quality steel molds machined on CNC machines and often employ electrical discharge machining (EDM) for fine finishing of critical contours. For high-definition embossing, the molds must achieve micron-level precision, sometimes requiring polishing with diamond tools to obtain sharp edges. For 3D embossing, Tsing can use multi-stroke continuous presses or compound presses to form the metal without causing wrinkling or cracking. We regularly inspect and repolish the molds to maintain surface finish during high-volume production; spare molds are prepared for critical patterns.

Before producing samples, we first create die-cutting lines, vector graphics, and model renderings. For tactile review, small batches of prototypes are made so that relevant personnel can feel the embossing depth and verify the dimensions, hinge function, and coating appearance. Then, printing and production parameters are adjusted, and forming pressure is regulated to prevent cracking or tearing of the tinplate. Food-grade or corrosion-resistant varnishes are used to protect exposed metal and printed patterns. For frequently used pencil cases, we apply a durable, wear-resistant topcoat. Soft-touch varnish is applied to selected areas to create contrast with the metal-embossed areas. The quality team implements statistical process control for embossing depth, registration accuracy, and coating thickness. They establish acceptance criteria and sampling plans to ensure consistent quality across batches of pencil cases.

Making Pencil Tin Cases Look More High-End

Through the clever use of 3D embossing, high-definition embossing, and micro-engraving techniques, metal pencil cases can be transformed from ordinary commodities into high-end collectibles. These techniques give the pencil cases a rich tactile feel, visual depth, and anti-counterfeiting features, thereby increasing their value and enabling higher pricing.

Choose 3D embossing to create striking, three-dimensional logos and tactile experiences. Use high-definition embossing technology to showcase complex patterns, delicate textures, and background details. Add micro-engraving for security, serialization, and ultra-fine textures. Employ multi-layer finishes to enhance contrast and tactile feel, allowing customers to experience the difference.

Capsule Tins

Capsule Tins Sealing Guide: Moisture-Proof and Leak-Proof Techniques for Storing Medication Capsules

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In the healthcare industry, a single seal failure can expose capsules to moisture, contamination, or oxidation, compromising product safety, shortening shelf life, and potentially leading to costly recalls. Therefore, we believe packaging should be both invisible and indispensable: ensuring drug safety while reflecting your brand. In this guide, we will show you how Tsing’s sealing technology for capsule tins (also known as pharmaceutical tins or capsule tins) provides superior sealing performance for capsules and powdered medications.

The Importance of Sealing Performance for Capsule Tins

Sealing performance determines critical aspects of capsule packaging, including moisture ingress, oxygen exposure, and aroma retention. For pharmaceuticals and health products, these factors directly impact efficacy, dissolution profiles, and patient safety. Compared to many other secondary packaging forms, well-designed capsules or pharmaceutical tins offer significant advantages:

Mechanical Strength: Metal tins resist crushing, puncturing, and rough handling during transportation.

Thermal Stability: Tin cans can withstand a wide range of temperatures during sterilization or transportation.

Reusability and Consumer Trust: Well-sealed tin cans demonstrate quality, encourage reuse, and increase brand touchpoints.

However, metal alone does not guarantee a complete seal. Metal lids can shift, gaps can allow moisture ingress, and seams or welds can become points of failure. Therefore, an integrated sealing strategy is required for metal pharmaceutical packaging: an inner plug or secondary lid, high-performance sealing gaskets, seamless (drawn) can bodies, and a necking/crimping process that ensures a tight fit for the outer lid. This multi-layered sealing approach addresses both visible leaks and microscopic leaks, meeting the sealing control requirements of pharmaceutical clients for capsule containers. In short, sealing is an essential functional requirement for any pharmaceutical-grade capsule tin.

Capsule Tins

Using an Inner Plug Lid Structure

An effective way to lock in aroma and keep moisture out is to use an inner plug lid. Tsing’s high-seal process incorporates a second barrier beneath the metal outer lid: either a plastic inner plug or a second metal lid. Both have their advantages:

1. Plastic Inner Plug (Press-fit or Snap-on):

  • Typically molded from food-grade PP, PE, or compatible polymers. A contact surface is formed that conforms to the container’s contour, compressing slightly upon closure to improve friction and reduce micro-gaps.
  • A ribbed skirt or washer seat design can be used to increase retention and sealing compression force.
  • Advantages: Low cost, customizable geometry, and excellent barrier properties when used in combination with gaskets or O-rings.

2. Auxiliary Metal Inner Lid (Nested or Double-Layer Lid)

  • A thin metal disc is located inside the outer lid, forming a second seal.
  • It can be pressed into a neck groove or secured with a snap-fit ​​flange.
  • Features thermal compatibility (e.g., steam sterilization) and a continuous, metal-to-metal interface that is resistant to permeation.
  • Advantages: More suitable for high-temperature processes and ideal for customers seeking an all-metal system without visible plastic.

Both of these inner plug strategies significantly reduce the migration of volatile compounds and slow down moisture ingress. They are essential for highly aromatic nutraceuticals or capsule oils. Furthermore, the inner plugs we use are made from pharmaceutical-grade materials that meet USP (United States Pharmacopeia) standards and are validated to prevent migration or extraction upon contact with the capsule formulation.

Capsule Tin Sealing Gasket Technology

Sealing gaskets are used to provide a direct seal between the lid and the container. The right gasket material can effectively control moisture and oxygen ingress. Tsing’s capsule tin sealing gasket options include PVC gaskets, silicone rings, and EPE liners:

1. PVC Gaskets:

  • Good compressibility and cost-effectiveness.
  • Performs well in moderate temperature ranges and provides sufficient moisture protection for many capsule products.
  • Can be formulated to meet food and drug contact standards (plasticizer-free grades are recommended).

2. Silicone Rings:

  • Excellent thermal stability, making them ideal for applications requiring sterilization or high-temperature storage.
  • Low compression set, excellent elasticity, and good aging resistance.
  • Silicone offers excellent sealing performance for medications containing volatile active ingredients because it maintains sealing pressure over extended periods.
  • For compatibility with medications, consider using medical-grade platinum-cured silicone.

3. EPE Gaskets

  • Offers excellent shock absorption and moderate sealing performance, with low moisture absorption.
  • Economical and lightweight, ideal for consumer-facing cans where the visible “soft-closing” design is beneficial.
  • Not suitable for high-temperature sterilization unless specially formulated.
  • In practical applications, we typically recommend silicone rings or a hybrid solution (silicone + EPE backing) for capsule tins or pharmaceutical tins, as the elasticity and low water vapor transmission rate of silicone provide a reliable long-term barrier. However, for cost-sensitive applications, we might prefer PVC with other control measures.

Capsule Tin Sealing Gasket Technology

Seamless Drawing Process – Eliminating Welding-Related Leaks

One of the main failure modes of metal packaging is seam leakage. Traditional welded or side-seam tins introduce potential defects, stress concentration points, and crevice corrosion areas, affecting packaging integrity. Tsing addresses this issue with a seamless drawing process, where the entire capsule tin is stamped and drawn from a single sheet of tinplate, forming a monolithic can body without welded seams on the bottom or sides.

Key Advantages of Seamless Drawn Capsule Tins:

Structural Continuity:  The absence of welded joints eliminates gaps for liquid or powder ingress. This makes the tin can suitable even for containing liquids or hygroscopic fine powders.

Improved Barrier Uniformity: The continuous metal wall exhibits predictable permeability behavior and uniform thermal expansion during sterilization or thermal cycling.

Corrosion Resistance: Welds often present weak points where coatings may fail; the seamless body maintains the integrity of the paint layer and simplifies the application of internal coatings.

Aesthetic and Tactile Quality: Seamless tins look cleaner and feel smoother – crucial for consumer trust in the pharmaceutical and nutraceutical sectors.

This seamless process requires precision molds and deep drawing machines. It also has strict requirements for material selection: the tinplate must possess appropriate tensile strength and elongation to avoid cracking during deep drawing. Tsing’s engineering team optimizes the thickness of the tinplate and the pre-lubrication process to maintain its formability and the adhesion of the internal coating. For capsule or pharmaceutical packaging, seamless tinplate cans significantly reduce the risk of leakage and the formation of micro-channels. Combined with an inner plug and high-performance sealing ring, the resulting capsule containers provide a robust, reliable, and proven solution, even for moisture-sensitive formulations.

Seamless Drawing Process Eliminating Welding-Related Leaks

Neck-down and crimping – precision sealing for flush fit and friction seal

Even with an inner plug and gasket, external mechanical sealing remains crucial. Necking (reducing the diameter of the can opening) and crimping are two mechanical operations that improve lid retention, achieve a flush fit, and enhance the sealing effectiveness of the friction seal. Tsing employs precision necking and crimping processes tailored explicitly for pharmaceutical tins.

How necking and crimping improve sealing:

Flush lid engagement: The slightly reduced diameter of the neck allows the lid to fit completely and evenly, creating a continuous contact surface. This prevents lid tilting and reduces side gaps.

Increased radial compression: A small inward flange is pressed into the can opening edge, increasing radial pressure when the lid is closed, forcing the gasket to compress evenly and creating a tighter seal.

Tamper-evident: The correct crimp geometry makes the lid more challenging to open accidentally or unintentionally – a worthwhile feature for product security and regulatory requirements.

Improved retention in automated processes: Automatic capping and sealing machines can handle necked/crimped tins more reliably, with consistent torque and minimal slippage.

Creating reliable, high-seal pharmaceutical capsule tins

From the inner plug and high-performance sealing gasket to the seamless drawing process and precision necking and crimping, each of Tsing’s technologies plays a unique role in protecting capsules from moisture, oxygen, and contamination. When these structural solutions are combined with auxiliary preservation measures such as desiccants, nitrogen flushing, and proven quality testing, the capsule tins become a highly reliable packaging option for pharmaceutical and healthcare products.

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5 Reasons: Why hinged lid tins are a popular packaging solution?

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When a customer stands in front of a product display, they open a small metal box, feel the smooth movement of the hinge, and then put the box in their pocket. Your brand logo is still clearly visible, and the brand image is deeply imprinted in the customer’s mind. As a tin can manufacturer, I’ve seen many clients perfectly combine practical functionality with branding using hinged tins. Therefore, I will explain 5 specific reasons, from the perspectives of manufacturing experience, material science, and valuable marketing, why hinged lid tins remain the preferred packaging solution for many product categories, such as mints, chewing gum, nail polish tins, and electronic accessories.

Reason 1: Hinged Lid Tins: Durability and Product Protection

First, hinged lid tins effectively protect their contents. Unlike thin cardboard or soft plastic, tinplate provides strong mechanical protection against crushing, punctures, and moisture. The hinged lid design keeps the lid attached to the body, reducing the risk of loss and preventing accidental spills. As a tin can manufacturer, Tsing optimizes hinge torque to balance secure closure and easy opening. Too tight would be inconvenient for users; too loose would lead to accidental opening. For products requiring a more robust seal (such as powder samples or small electronic devices), we also consider using gaskets or nested lid designs. For food contact applications, we use food-grade coatings and verify the internal coating to prevent corrosion and odor transfer.

Hinged Lid Tins Durability and Product Protection

Reason 2: Hinged Lid Tins Offer a Better User Experience and Convenience

Packaging is more than just a container—it’s the interface between the brand and the user. Hinged lid tins excel in user convenience. Because the lid is permanently attached to the body, users can open and close the box with one hand without losing the lid. For pocket-sized items like mints, lip balm, or cosmetic samples, this convenient one-handed operation encourages repeated use.

Tsing’s hinged tin cans are designed with ergonomics in mind: rounded edges provide a comfortable feel, the lid has a secure clasp, and there is appropriate internal clearance for easy removal of contents. For promotional gifts, this pleasant tactile experience enhances the perceived value of the product. Users will keep and reuse these metal tins, for example, to store sewing needles, pills, or small cables.

Hinged Lid Tins 4-5

Reason 3: High-Impact Branding and Customization Options

The flat lid and body of hinged tins provide excellent space for branding. At Tsing, we help clients cleverly utilize this space: using offset printing for full-color photos, Pantone color matching for corporate branding, hot stamping for high-end details, and embossing for tactile logos. These decorative options are particularly effective on hinged lid metal tins.

We also offer more advanced options—3D embossing, micro-engraving, and soft-touch varnish—all of which add depth and a premium feel to the product. For brands requiring precise color reproduction, our Pantone color-matching process and color proofing minimize color variations across production batches. Furthermore, the hinged design allows for a double-sided display: one side for prominent branding and the other (on the inside of the lid or on the bottom) for product information or brief brand messaging. We can also customize special shapes and windowed lids based on display needs, especially for limited editions or gift sets.

High-Impact Branding and Customization Options

Reason 4: Sustainability, Reusability, and Lifecycle Advantages

Tin cans perform exceptionally well in terms of recyclability and circularity; tinplate is fully recyclable and re-enters the metal supply chain with a high recycling rate. More importantly, hinged metal tins are durable and reusable, and in many scenarios, consumers typically keep and reuse them for years, extending the packaging’s lifespan.

At Tsing, we emphasize design choices that enhance recyclability: single-material construction, easily removable liners, and the use of water-based varnishes whenever possible. We can source tinplate containing recycled content to reduce carbon emissions and provide chain-of-custody documentation when needed to support sustainability claims. For many brands, the reusability of hinged metal tins increases brand exposure while reducing the environmental impact per use.

Reason 5: Merchandising, Shelf Display, and Distribution Advantages

Hinged lid tins not only protect products and promote brands but also boost sales. Their sturdy design and reflective surface make them particularly eye-catching on retail shelves and counters. Hinged lids on tins facilitate product sampling at the point of purchase: staff can open the tin to showcase the product and immediately close it again, maintaining hygiene and a tidy display. In terms of merchandising, hinged tins stack easily and integrate well into attractive retail displays.

From a distribution perspective, hinged lid tins are more resistant to common shipping risks than many other packaging types. They reduce breakage and return rates, thereby lowering distribution costs. The reusability of tin cans also encourages consumers to discover the brand through the retained tin, leading to repeat purchases or upsells. At Tsing, we assist our clients with display design and secondary packaging to ensure that hinged tin cans perform optimally in retail environments.

Protective and Reusable Tins

Hinged lid tins are popular because they offer a combination of protection, reusability, brand impact, sustainability, and measurable production economies. If product protection and reusability are crucial, hinged tins are an excellent choice. If durability or long-term visibility of the product is required, hinged tins are often the best option. As a tin cans manufacturer, Tsing always prioritizes design for manufacturability, high precision, and high-quality craftsmanship.

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Custom-Printed Mint Tins with Hinged Lids: Brand Logos for Promotional Giveaways.

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When potential customers reach for mints during promotional events in various shopping malls, the packaging often leaves the first and most lasting impression. Small, exquisite, and well-crafted hinged-lid mint tins do more than hold the product; they are brand keepsakes and touchpoints that accompany customers in their daily lives. Therefore, I will tell you everything that Tsing includes when providing custom-printed hinged-lid mint tins as promotional gifts: materials, decoration processes (including our 3D embossing, micro-engraving, and Pantone color matching), structural precision to address sticker application issues, food contact material compliance, and more.

Why Hinged Mint Tins are an Ideal Choice for Promotional Gifts

The hinged lid provides a premium tactile experience: a crisp, satisfying click when opening and closing, secure and reliable, not easily lost, and easy to operate with one hand, making it ideal for pocket-sized gifts. From a brand promotion perspective, hinged tins offer two large flat surfaces for displaying brand logos and designs: the lid and the base. Our designers can use one surface for eye-catching graphics and the other for product labeling.

From a practical standpoint, hinged mint tins are durable and reusable. Recipients will keep and reuse them—for example, to store pills, badges, or small trinkets—giving your brand logo repeated exposure. Compared to disposable packaging, well-made hinged-lid mint tins extend brand presence in consumers’ minds and enhance brand value.

Why Hinged Mint Tins are an Ideal Choice for Promotional Gifts

Mint Tins Materials, Internal Coatings, and Food Contact Compliance

We primarily use high-quality tinplate for our mint tins because of its formability, printability, and recyclability. Tinplate is strong and durable, suitable for the hinge mechanism, and maintains clear patterns after embossing or printing. If you require lightweight or special needs, aluminum is also an option, although its decorative and forming characteristics differ.

Food contact safety involves two related decisions: internal coating and regulatory compliance. Many mint formulations contain flavorings and acidic substances that can react with or accelerate corrosion of bare metal. To prevent flavor transfer and ensure shelf life, Tsing applies food-grade varnish or polymer barrier coatings to the inside walls of the tins. These varnishes comply with FDA and EU food contact requirements; compliance documents can be provided upon request. For products with high oil content, we use varnishes that have been tested and certified for specific compatibility.

3D Embossing, Micro-Engraving, and Pantone Spot Color Printing

Decoration is key to making your mint tins reflect your unique brand personality. At Tsing, we offer a range of surface treatment techniques that meet high-craftsmanship standards, combining them to achieve a striking, precise brand image.

3D Embossing: Embossing adds texture and depth by raising design elements from the metal surface, creating a tactile impact that immediately catches the consumer’s eye. For brand identification, we can emboss logos, seals, or patterned backgrounds. Embossing can be applied to the lid, base, or both; multi-layer embossing creates a striking, premium effect.

Micro-Engraving: For extremely fine details such as miniature text, intricate patterns, or serial numbers, we use micro-engraving technology. This can be milling-based tool machining or laser-assisted engraving to achieve extremely high precision. Micro-engraving combined with localized surface treatments such as hot stamping can create sophisticated anti-counterfeiting features or collector’s editions.

Spot Color Printing and Pantone Matching: We also offer Pantone spot-color printing to ensure your brand colors remain consistent across batches and print runs. The Pantone Matching System (PMS) spot color printing delivers predictable, repeatable brand colors. At Tsing, we conduct color proofing and review Pantone color swatches before production. We also offer spectrophotometer testing services and can provide color certification reports for applications requiring the highest color accuracy.

3D Embossing, Micro-Engraving, and Pantone Spot Color Printing

Addressing Uneven Bottoms and Sticker Application Issues

A common packaging problem is uneven tin bottoms, which make sticker application difficult and give the display a less professional look on the shelf. Based on our production experience, the root causes are inconsistent molds, forming stress, and mold design flaws. At Tsing, our automated manufacturing processes and engineering controls effectively address this issue, ensuring consistent base flatness and precise hinge alignment.

Mold Design: Our molds feature compensation zones and precise male-female clearances to minimize springback and deformation during forming. Mold tolerances are verified through first-article inspection and optimized for specific tin can diameters and thicknesses.

Process Control: During stamping and forming, we control the blank holder pressure, drawing depth, and annealing cycles. Segmented forming prevents excessive work hardening and ensures the base remains consistently flat. We utilize Statistical Process Control (SPC) on critical dimensions (base flatness, lid fit, and hinge torque) to identify deviations before mass production.

Post-Forming Processes: For surfaces intended for labeling, we ensure a smooth, tool-mark-free base. If you plan to secondary-label, we can conduct pre-labeling tests to verify sticker adhesion and flatness.

Addressing Uneven Bottoms and Sticker Application Issues (1)

Production Process, Tooling, Minimum Order Quantity, Lead Time, and Cost Considerations

In addition to providing reliable custom mint tin services, we will also inform you about our overall production flow, tooling, minimum order quantities, and lead times to help you better understand our process.

Tooling and Manufacturing: Custom tin cans require tooling – stamping dies, embossing dies, and printing plates. Tooling costs depend on size, complexity, and additional processes such as micro-engraving or hot stamping. We will provide a tooling quote in advance and can store the molds for subsequent orders according to mutually agreed terms.

Minimum Order Quantity (MOQ): Our minimum order quantity is 3000 pieces, while multi-color spot printing, embossing, and hot stamping processes require higher MOQs due to higher plate-making and setup costs.

Lead Time: The lead time for most custom products is approximately 6 weeks, from design confirmation to shipment. For complex projects involving 3D embossing, multi-color matching, or new molds, the lead time may extend to 10-12 weeks. Cost Optimization: To help you balance cost and impact, please consider the following aspects: Choose one or two high-impact decorative processes (e.g., Pantone color printing + embossed logo) instead of using multiple complex effects on both the lid and base; standardize the dimensions of different product lines to allow for mold reuse; and consolidate production batches of different SKUs to achieve corresponding pricing targets.

Delivering Product Packaging with Higher Craftsmanship and More Precise Structure

Custom-printed hinged-lid mint tins are more than just simple containers; they are also a functional, durable, and visually impactful brand promotion tool. For Tsing, a successful mint tin project begins with the right structural design and material selection. High-quality tinplate, food-grade inner coating, and precisely designed hinged lids ensure product safety, ease of use, and a superior tactile experience. Equally important is manufacturing precision: by addressing common issues such as uneven tin box bottoms, Tsing ensures reliable label application and consistent product appearance in large-scale production.