Plastic And Rubber

Dyes are often used to color transparent plastics, especially for food packaging, medical packaging, and printing on some decorative plastic parts. Dyes can provide bright, transparent colors, making plastic products more attractive.

Dyes are particularly suitable for transparent or translucent plastics, because they dissolve well and show bright colors. Common plastics such as polypropylene (PP), polyester (PET) and polycarbonate (PC) may use dyes. Some plastic products use fluorescent dyes, especially in the fields of toys, stationery, advertising signs, and cosmetic packaging. Fluorescent dyes can glow under ultraviolet light, producing special visual effects.

Some dyes have good thermal stability and can withstand high temperatures during the injection molding process of plastics, ensuring that the quality of the final product will not be affected by the decomposition of the dye during processing.