Chemical dye is a kind of synthetic colorants. Modern dyestuff industry, is used in the petrochemical, coal chemical and other industrial production of various basic materials, such as benzene, naphthalene, etc., in the dye chemical plant to synthesize a variety of dyes. There are tens of thousands of varieties of dyes in the world. Widely used in all walks of life and daily life, wearing colored clothes color is dye, all kinds of goods are too many colors can not be the credit.