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Colour Index (CI)


Colour Index (CI)

The colour index (CI) number, developed by the Society of Dyers and Colorists, is used for dye classification. Once the chemical structure of a dye is known, a five digit CI number is assigned to it. The first word is the dye classification and the second word is the shade or hue of the dye. Such as CI Acid Yellow 36 (CI 13065) is a yellow dye of the acid type. Furthermore, a dye mixture can include several dyes such as Navy 106 is composed of three reactive azo dyes: Remazol Red RB, Remazol Black B, and Remazol Golden Yellow 3. The society of colourist and dyers website uses an application that categorize the substance and data supplied by manufacturers:

  • Substance form
  • Data from manufacturers
  • Category of use by branches
  • Main application (the type of fibres or fabric in case of textiles, and other industries depending on materials for example steel, paper)
  • Product status (whereof withdrawn from production or other issues related environment etc.)
  • Hue Indication Chart (map)

Visit their website: Society of colourist and dyers


  • Society of Dyers and Colourists (Great Britain) and the American Association of Textile Chemists and Colorists, which includes periodic additions and amendments. Website above Society of colourist and dyers
  • Encyclopedic Dictionary of Polymers. Published 2007 by Springer Science+Business Media, LLC.

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Kenneth Lyngaas

Kenneth Lyngaas

Founder & fashion designer at Buddha Jeans Company
Sustainable fashion designer & eco-philosopher Sustainable fashion dedicated the twenty-first-century green living, design for change through system thinking, eco-philosophy, spirituality, and sustainability.
Kenneth Lyngaas
Kenneth Lyngaas
The top stories on Sustainable Fashion design across the Internet. Edited daily by a team of editors. News dedicated fashion design for the twenty-first-century green lifestyle and eco-fashion community. Subscribe https://paper.li/buddhajeans/1322177882#/
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