Color Index (CI for short) is an international collection of dyes and pigments jointly published by the British Association of Dyeers (SDC)and
American Textile Chemists and Dyeers Association (AATCC).It collects the commodities produced by various dyefactories invarious countries
in the world, and gives two numbers to each dye according to its application category and chemicl structure category, and explains their
application characteristics one by one. It also has a comparison table of various commodity namesof dyes with thesame structure