Organic Pigments

Organic pigments are further divided into two subgroups:

Natural Organic Pigments And Synthetic Organic Pigments

Common types include azo pigments, lake pigments, phthalocyanine pigments and quinacridone pigments. They are all artificially synthetic organic compounds. The intermediate, synthesis process and equipment required by such kind of pigments are generally the same as that required by organic dyes, therefore usually manufactured in the dye industry. However, as pigments, they are, after all, different from the organic dyes.

Organic pigment is an insoluble organic matter, which is usually colored by adding a substrate in a highly dispersed state. Its fundamental difference from dyes is that dyes can be dissolved in the dyeing medium used, while pigments are insoluble in neither the medium in which they are used nor the colored substrate. Many pigments and dyes are identical in chemical structure, and they can be transformed into each other by using different methods. For example, some vat dyes and sulfide vat dyes can be used as fiber dyes if they are reduced to leuco. If it is not reduced, it can be used as a pigment for advanced inks. Organic pigments are widely used in printing ink, paint, dope and synthetic fiber, as well as pigment printing of fabrics, plastics, rubber and leather, etc. Among them, the amount of pigment used in printing ink is the largest. The output of organic pigments accounts for about a quarter of the total output of dyes.

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