Huicong Network News: coating the coloured organic compounds as raw material to produce the pigment called organic pigment ORGANIGPIGMENT. A type of pigment made of organic compounds, which has a color and other series of pigments. Pigment properties including fast, water leaching, acid and alkali resistance, organic solvent resistance, heat resistance, stable crystal type, dispersion and hiding power etc.. The difference between organic pigment and dye is that it has no affinity with the colored object, and only the organic pigment is attached to the surface of the object by adhesive or film forming material. The production required intermediates, production equipment as well as the synthesis process and dye production similar and therefore tend to be organic pigments in dye industry to organize production. Compared to organic pigment and inorganic pigments, usually has a high tinting strength, particles easily grinding and dispersion, are not easy to deposit, the color is bright, but fast, heat resistance, weather resistance is poor. Organic pigments are widely used in inks, coatings, rubber products, plastic products, stationery and building materials material coloring. According to the structure classification: (1) azo pigment accounted for 59% (2) phthalocyanine pigment accounted for 24% (3) triarylmethane dye accounted for 8% (4) of the special paint accounted for 6% (5) polycyclic pigment accounted for 3% of organic pigment is vivid in color, tinting strength; density of small, non-toxic, but some varieties of light resistance, heat resistance, solvent resistance and resistance to migration are often not as good as inorganic pigments. Color variety of endless, colorful, but between the variety of colors exist certain inner link, once upon a time the colors are available three parameters to be determined, namely the hue, lightness and saturation. The color tone is the characteristic that the color is different from each other. It is decided by the composition of the light source and the feeling of the eye. Lightness, also known as brightness, is a representation of the object surface shading degree change of eigenvalue; through the comparison of various color brightness, the color is bright and dark. Also known as chroma, saturation, feature representation of object surface color shading value, color is bright and dark don. Hue, lightness and saturation constitute a three-dimensional, with the three establishment scale, we can use numbers to measure color. The nature of the color of the myriads of changes, but the most basic is red, yellow, blue three, known as the primary colors.