Colour Index International (CI) is a reference database jointly maintained by SDC Enterprises and the American Association of Textile Chemists and Colorists. It currently contains over 27,000 individual products listed under 13,000 Colour Index Generic Names. It was first printed in 1924 but is now published solely on the Internet. The index serves as a common reference database of manufactured colour products and is used by manufacturers and consumers, such as artists and decorators.
Colourants (both dyes and pigments) are listed using a dual classification which use the Colour Index Generic Name the prime identifier and Colour Index Constitution Numbers. These numbers are prefixed with C.I. for example, C.I. Acid Orange 7 or C.I. 15510. (This abbreviation is sometimes mistakenly thought to be CL, due to the font used to display it.) The generic name lists first the class of dye (acid dye, disperse dye, etc.), then its hue (e.g., orange), followed by a number assigned by the Colour Index, in chronological order (e.g., Acid Orange 5, Acid Orange 6, Acid Orange 7).
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.
List of Colour Index Constitution Numbers
Colour Index arranges the CICN into 5 or 6 digit (from 1997 onwards) numbers grouped into numerical ranges according to the chemical structure.4
| Structure | Range | Category |
|---|---|---|
| Nitroso | 10000–10299 | |
| Nitro | 10300–10999 | |
| Monoazo | 11000–19999 | Category:Azo dyes |
| Disazo | 20000–29999 | Category:Azo dyes |
| Trisazo | 30000–34999 | Category:Azo dyes |
| Polyazo | 35000–36999 | Category:Azo dyes |
| Azoic | 37000–39999 | Category:Azo dyes |
| Stilbene | 40000–40799 | |
| Carotenoid | 40800–40999 | |
| 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:Oxazine dyes |
| Thiazine | 52000–52999 | Category:Thiazine dyes |
| Sulfur | 53000–54999 | |
| Lactone | 55000–55999 | |
| Aminoketone/Hydroxyketone | 56000–56999 | |
| Anthraquinone | 58000–72999 | Category:Anthraquinone dyes |
| Indigoid | 73000–73899 | |
| Quinacridone Pigments | 73900-73999 | |
| Phthalocyanine Dyes and Pigments | 74000–74999 | Category:Phthalocyanines |
| Natural Organic Colouring Matters | 75000–75999 | Category:Natural dyes |
| Oxidation bases | 76000–76999 | |
| Inorganic pigments | 77000–77999 | Category:Inorganic pigments |
For further in depth reading see "Chemical constitutions in the Colour Index™: A century of colourant classification"5 This is open source and free to read.
Print editions
- 1st (1924)
- 1st Supplement (1928)
- 2nd (1956) Volume 1
- 2nd (1957) Volumes 2 & 3
- 2nd (1958) Volume 4
- 2nd Supplement (1963)
- 3rd (1971)6
- 3rd 1975 (Volume 6)
- 3rd 1982 (Volume 7)
- 3rd 1987 (Volume 8)
- 3rd 1992 (Volume 9)
- Pigments and Solvent Dyes edition (1997)
- 4th 2000 - online
See also
External links
- American Association of Textile Chemists and Colorists
- Colour Index International
- Society of Dyers and Colourists
- Happy 100 year anniversary of the International Colour Index
References
"American Association of Textile Chemists and Colorists". Colour Index International. Retrieved 8 August 2015. http://www.aatcc.org/ ↩
"About (Colour Index International)". Colour index international. Retrieved 8 August 2015. http://colour-index.com/about ↩
"Colour Index™ Generic Name (CIGN): Definition of a Colour Index™ Generic Name". Colour Index. Retrieved 2024-02-23. https://colour-index.com/colour-index-generic-name ↩
Gürses, Ahmet; Açıkyıldız, Metin; Güneş, Kübra; Gürses, M. Sadi (2016). Dyes and Pigments. Springer. p. 32. ISBN 9783319338927. 9783319338927 ↩
Towns, Andrew. "Chemical constitutions in the ™: A century of colourant classification". Coloration Technology. n/a (n/a). doi:10.1111/cote.12819. ISSN 1478-4408. https://onlinelibrary.wiley.com/doi/10.1111/cote.12819 ↩
Colour Index™ (Third ed.). The Society of Dyers and Colourists. 1924. ↩
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