|MadSci Network: Chemistry|
Dear Anonymous "Iron oxides, titanium dioxide, or organic pigments are most often employed as colorants." according to Ullmann's Encyclopedia of Industrial Science and Technology, Electronic Edition, 1999. Organic pigments are insoluble organic compounds with a strongly selective light absorption, i.e. strong color, which are mixed into the formulation in a very finely ground state (particle diameter around 1/10000 in.). Generic descriptions of organic pigments are listed in the "Color Index" (C.I.). Best regards Werner Sieber
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