An organic pigment refers to a kind of pigments made of organic compounds having a color and other series of pigment properties. Its characteristics include light fastness, resistance to water immersion, acid, alkali, organic solvents, and heat, crystal stability, dispersibility and hiding power.
The difference between an organic pigment and a dye is that it has no affinity for the object to be colored and the object is colored only by adhering the organic pigment to the surface of the object or by mixing it inside the object by means of an adhesive or a film-forming substance. The production of intermediates, production equipment and synthesis processes are similar to the production of dyes, so organic pigments often organize production in the dye industry. Compared with the general inorganic pigments, organic pigments usually have a high color strength. It is easy to grinde and disperse, but not easy to precipitate. The color is also more bright, but have light fastness, heat resistance, poor weather resistance. Organic pigments are commonly used for the coloring of materials such as inks, coatings, rubber products, plastic products, cultural and educational supplies and building materials.