Why does the tinplate box have a printed layer inside?

The Purpose and Benefits of Internal Printing on Tinplate Boxes

When using tinplate boxes, you may have noticed that the internal packaging is printed with a layer of color, commonly pure white or colored. This raises the question: why is it necessary to print colors on the inside of tinplate box packaging?

 Environmental and Safety Considerations

Tinplate boxes are designed to have minimal environmental impact. The internal coating of these boxes is crucial for preventing corrosion and ensuring the safety of the contents. The coating used must be non-toxic, odorless, have good adhesion, adsorption, flexibility, and corrosion resistance. Additionally, it should maintain its properties and not emit harmful substances even under low-temperature heating.

 Types of Coatings Used

The coatings applied to the inside of tinplate boxes include phenolic resin coatings, epoxy-phenolic resin coatings, acrylic resin coatings, and aluminum powder coatings. These coatings serve to protect the tinplate from rust and chemical reactions with the contents, thereby preserving the quality of the packaged goods.

 The Role of Internal Coatings

The primary purpose of the internal coating in tinplate boxes is to act as a barrier against oxidation, protecting the tinplate from rusting. This coating also prevents the contents from being contaminated by the tinplate material, ensuring the safety and quality of the packaged goods. Furthermore, the coating enhances the aesthetic appeal of the packaging, providing consumers with a sense of security and confidence in the product.

 Benefits of Internal Coatings

The internal coating in tinplate boxes not only prevents corrosion but also protects the packaging from being scratched or damaged by external forces. This layer of coating adds to the overall durability and appearance of the tinplate box, making it more visually appealing.

 Conclusion

In conclusion, the internal printing on tinplate boxes serves a vital function in protecting the contents and enhancing the packaging's appearance. The use of specific coatings ensures that the boxes are safe, durable, and visually appealing, making them an ideal choice for a wide range of packaging needs. By understanding the purpose and benefits of these internal coatings, consumers and businesses can make informed decisions about the use and selection of tinplate boxes.