What coffee tins are needed for beans of different roast levels?

Coffee beans are typically roasted to three different degrees during the roasting process: light, medium, and dark. Therefore, for customers with precise needs and refined coffee bean roasting degrees, they need coffee tins that can store different roasting degrees intact. To meet these customized needs, we can design and manufacture coffee tins tailored to light, medium, and dark roasted coffee, selecting corresponding materials, surface treatments, and valve technologies based on the volatile compound release and oxidation sensitivity of each roasting degree.

Coffee tins are suitable for storing lightly roasted coffee beans.

According to our customer feedback, the moisture content of lightly roasted coffee beans is typically between 8% and 10%. These beans rapidly degas to 20 ml per gram within 72 hours, requiring specialized packaging to preserve their delicate floral and fruity aromas. Therefore, we will use high-grade tinplate to produce coffee tins and add epoxy resin to the lining to ensure that the water vapor transmission rate is less than 0.1 g/m2·24 hours. Additionally, we will have a one-way degassing valve that prevents oxygen from entering while discharging carbon dioxide. The anodized can body effectively blocks UV rays to prevent degradation of chlorogenic acids and esters. Engineers calibrate the valve position 10 mm from the center of the lid to ensure uniform degassing while minimizing aroma loss. This ensures that the light-roasted beans placed in the coffee can preserve their full flavor.

Coffee tins for medium-roasted coffee beans

According to user feedback, medium-roasted coffee beans have a moderate degassing volume of 15 ml per gram of coffee beans in the first week, with a moisture content of approximately 9%. Therefore, for medium-roasted coffee tins, aluminum-tin composite materials are used to ensure that the oxygen transmission rate is less than 0.5 cc/m²/24 hours, which can maintain a fresh taste for up to 12 weeks. In addition to incorporating a strong one-way valve with a protective function, we also utilize five layers of food-grade barrier paint to reduce flavor oxidation by 30%. Therefore, the balanced sweetness and caramelization of coffee beans can be maintained in such a custom coffee tin. A silicone seal with a compression force of 200 N/mm is placed around the lid to ensure a tight seal on the shelf, resulting in a delicate and balanced flavor.

Packaging of dark roasted coffee

Dark roasted coffee beans exhibit high surface oils and rapid degassing, releasing 30 ml per gram in the first 48 hours. This demands special corrosion prevention measures. Therefore, manufacturers line coffee tins with high-temperature-resistant epoxy resin and reinforce them with PTFE gaskets to withstand prolonged oil contact. During the production process, the cans undergo a secondary polymer passivation step to prevent tin oil reaction and metallic odor. Additionally, the gasket features a hardness of 70 Shore A, which helps maintain seal integrity and prevents oily coffee beans from leaking out after 8 weeks of storage at 25°C. During the quality inspection, we perform ASTM D3985 testing to ensure that the oxygen transmission rate is less than 0.2 cc/m² after 24 hours of oil immersion, thereby retaining the rich, smoky aroma of dark roasted coffee beans.

Valve and lid design to accommodate various roasting methods

While the can bodies of different roasts are different, our one-way degassing valve and lid mechanical structure remain the cornerstone of all custom coffee tins. A universal valve assembly with a rated flow rate between 15 mL/min and 30 mL/min can accommodate degassing rates for different roast types. As a result, this valve assembly can reduce the success of orders without compromising performance. Additionally, we design the snap-on tolerance of the lid to 0.2 mm, ensuring a balance between easy opening and sealing. The design incorporates a full-circumference silicone gasket that evenly compresses under 50 N axial load, ensuring consistent batch-to-batch sealing performance. This consistent valve and lid structure enables different coffee roasters to store different roasts.

Design aesthetics for different roasts

Of course, a well-balanced coffee tin not only preserves flavor but also communicates roast characteristics through graphic design, color psychology, and tactile elements. Therefore, we speak with customers during the printing process to choose a color scheme that matches the roast intensity. For example, light roast coffee features soft tones and plant patterns, medium roast coffee employs warm, earthy tones and matte finishes, and dark roast coffee utilizes dark charcoal gray or rich metallic colors. Then, we use a soft-touch matte coating, raised UV embellishments, or metallic foil hot stamping to highlight the corresponding style. Of course, I need the customer to provide information such as the origin map, roasting date, and flavor wheel icon so that we can print it on the surface of the can when printing. By combining form and function, the coffee tin not only enhance its appeal but also create a better unboxing experience.

Customized packaging for different roasting degrees

We will select the appropriate coffee tins for different roasting degrees of coffee beans according to customer needs. In the process of customizing coffee tins, we utilize precision engineering materials, custom sealing technology, and personalized graphic design to ensure that light, medium, and dark roasted coffee beans receive the best protection, flavor retention, and consumer appeal.