The Society of Dyers and Colourists (SDC) is an international professional society, with headquarters in Bradford, United Kingdom, specializing in colour in all its manifestations. Founded in 1884, it was granted a Royal Charter of Incorporation in 1963. The SDC is a registered charity and its aims and objectives are "to advance the science of colour" in the broadest sense.
Together with the American Association of Textile Chemists and Colorists, SDC publishes the Colour Index International, which is recognized as the authoritative source on colourants. Colour Index International is used to identify the pigments and dyes used in manufacturing inks, paints, textiles, plastics, and other materials.
In association with London College of Fashion SDC offer four training modules which, alongside a dissertation, build to the SDC Colour Management of Textiles Diploma. Modules 1 and 2 can be taken in any order, but both must be taken before 3 or 4. Students who successfully complete all four modules will receive a Certificate of Colour Management of Textiles.