Papper
By adding dyes to the pulp or coating them on the surface of paper, the paper can present various desired colors. For example, the paper used for color books, packaging boxes, color magazines and other printed materials all need the help of dyes to achieve rich colors. Dyes can increase the color and beauty of paper, improve the transparency and gloss of paper, enhance the water resistance and light resistance of paper, and improve the printing performance of paper.