Introduction To Organic Pigments

Organic pigments are insoluble organic substances, which are usually added to the substrate in a highly dispersed state to color the substrate. The fundamental difference between it and dyes is that dyes can be dissolved in the dyeing medium used, while pigments are neither soluble in the medium in which they are used nor in the substrate to be colored. Many pigments and dyes are consistent in chemical structure, and they can be transformed into each other by using different methods. For example, some vat dyes and sulfur vat dyes can be used as fiber dyes if they are reduced to leuco ; If not reduced, it can be used as a pigment for advanced inks. Organic pigments are widely used in the coloring of inks, paints, coatings, and synthetic fibers, as well as the pigment printing of fabrics, the coloring of plastics, rubber, and leather, among which the pigments used in inks are the largest. The output of organic pigments accounts for about a quarter of the total output of dyes.