Anti-oxidation Treatment Process And Safety Assurance of Empty Cosmetic Tin Trays

Empty cosmetic tin trays are widely used in cosmetic packaging such as eye shadow and blush, and are popular for their lightness, durability and high-end texture. However, tin trays are susceptible to oxidation, which may cause surface discoloration or material corrosion, thus affecting product safety and beauty. Therefore, anti-oxidation treatment process and safety assurance have become key links in the production process. This article will explore the relevant processes and their significance to cosmetic safety in depth.

1. Causes of tin tray oxidation

Tin trays are mainly made of aluminum, tin alloys or other metal materials. When exposed to air, oxygen, moisture and chemicals may trigger oxidation reactions and form an oxide layer. This not only affects the appearance of the tin tray, but may also release trace metal ions, contaminate the contents of cosmetics, and increase the risk of skin irritation. Therefore, anti-oxidation treatment is a prerequisite for ensuring product quality and safety.

2. Anti-oxidation treatment process

Surface electroplating Electroplating is a common anti-oxidation process. By plating a layer of nickel, chromium or zinc on the surface of the tin tray, a protective film is formed to isolate air and moisture. The electroplating layer not only improves the antioxidant capacity, but also enhances the surface gloss, making the tin tray more high-end.

Anodizing For aluminum tin plates, the anodizing process can produce a dense aluminum oxide film on the surface. This film is hard and corrosion-resistant, and can be dyed to give the tin plate a variety of colors to enhance its aesthetics.

Organic coating Food-grade organic coatings (such as epoxy resin or polyurethane) are often used on the inner surface of tin plates to form a transparent anti-oxidation isolation layer. This coating not only prevents oxidation, but also prevents direct contact between metal and cosmetics to ensure safety.

Vacuum coating Vacuum coating technology provides excellent anti-oxidation performance by depositing nano-scale metal or non-metallic coatings on the surface of the tin plate, while maintaining a light and thin texture, which is suitable for high-end cosmetic packaging.

3. Safety measures

Material selection and testing Food-grade or cosmetic-grade metal materials that meet international standards must be selected in production, and heavy metal content must be detected by ICP-MS (inductively coupled plasma mass spectrometry) and other technologies to ensure that no harmful substances such as lead and cadmium are released.

Coating safety test Anti-oxidation coatings must pass skin contact tests and dissolution tests to verify that they will not release harmful chemicals during long-term use. For example, the EU Cosmetics Regulation (EC 1223/2009) requires that packaging materials must not pose a risk to human health.

Production Environment Control Anti-oxidation treatment must be carried out in a dust-free workshop to prevent dust or microorganisms from contaminating the coating surface. Production equipment must be cleaned regularly to prevent cross-contamination and ensure the cleanliness of the tin plate.

Quality Traceability System Establish a complete quality traceability system to record the material source, treatment process and test results of each batch of tin plates. Once a problem is found, it can be quickly located and recalled to ensure consumer safety.

4. The significance of anti-oxidation process

High-quality anti-oxidation treatment not only extends the service life of the tin plate, but also ensures the safety and stability of cosmetics. The smooth and corrosion-resistant surface of the tin plate can effectively prevent the contents from deteriorating and reduce the health risks of consumers when using it. In addition, the anti-oxidation process improves the aesthetics and brand value of the packaging and enhances market competitiveness.

5. Conclusion

Through anti-oxidation processes such as electroplating, anodizing, and organic coating, combined with strict safety assurance measures, the empty cosmetic tin plate has achieved the dual goals of corrosion resistance and high safety in production. The application of these technologies not only protects the beauty and health of consumers, but also drives the cosmetics packaging industry towards higher quality and more sustainable directions.