Colour Index International
Colour Index International is a reference database jointly maintained by the Society of Dyers and Colourists and the American Association of Textile Chemists and Colorists. It was first printed in 1925 but is now published exclusively on the web. The index serves as a common reference database of manufactured colour products and is used by manufacturers and consumers, such as artists and decorators.
Colorants (both dyes and pigments) are listed according to Colour Index Generic Names and Colour Index Constitution Numbers. These numbers are prefixed in Brazil and various other countries with C.I. or CI, for example, CI 15510. This abbreviation is sometimes thought to be CL, due to the font used to display the information. A detailed record of products available on the market is presented under each Colour Index reference. For each product name, Colour Index International lists the manufacturer, physical form, and principal uses, with comments supplied by the manufacturer to guide prospective customers.
For manufacturers and consumers, the availability of a standard classification system for pigments is helpful because it resolves conflicting historic, proprietary, and generic names that have been applied to colours.
Colour index numbers
The colour index numbers are grouped to ranges according to the chemical structure.
Structure Range Category Nitroso 10000-10299 Nitro 10300-10999 Monoazo 11000-19999 Category:Azo dyes Diazo 20000-29999 Category:Azo dyes Stilbene 40000-40799 Diarylmethane 41000-41999 Category:Diarylmethane dyes Triarylmethane 42000-44999 Category:Triarylmethane dyes Xanthene 45000-45999 Acridine 46000-46999 Category:Acridine dyes Quinoline 47000-47999 Category:Quinoline dyes Methine 48000-48999 Thiazole 49000-49399 Category:Thiazole dyes Indamine 49400-49699 Indophenol 49700-49999 Category:Indophenol dyes Azine 50000-50999 Category:Azin dyes Oxazine 51000-51999 Category:Oxazin dyes Thiazine 52000-52999 Category:Thiazin dyes Aminoketone 56000-56999 Anthraquinone 58000-72999 Category:Anthraquinone dyes Indigoid 73000-73999 Phthalocyanine 74000-74999 Category:Phthalocyanines Inorganic pigments 77000-77999 Category:Inorganic pigments
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