Organic pigment refers to a kind of pigment made from organic compounds with color and a series of other pigment characteristics. The pigment properties include light resistance, water immersion resistance, acid resistance, alkali resistance, organic solvent resistance, heat resistance, crystal stability, dispersibility and covering power. The difference between organic pigment and dye is that it has no affinity with the object to be colored. Only through adhesive or film-forming material can the organic pigment be attached to the surface of the object or mixed in the interior of the object to make the object colored. Organic pigment refers to a kind of pigment made from organic compounds with color and a series of other pigment characteristics. The pigment properties include light resistance, water immersion resistance, acid resistance, alkali resistance, organic solvent resistance, heat resistance, crystal stability, dispersibility and covering power.
The difference between organic pigment and dye is that it has no affinity with the object to be colored. Only through adhesive or film-forming material can the organic pigment be attached to the surface of the object or mixed in the interior of the object to make the object colored. The intermediates, production equipment and synthesis process required by the production of organic pigments are similar to those of dyes. Therefore, organic pigments are often produced in the dye industry. Compared with ordinary inorganic pigments, organic pigments usually have higher coloring power, particles are easy to grind and disperse, not easy to precipitate, and their colors are more bright, but their properties of light resistance, heat resistance and weather resistance are poor. Organic pigments are widely used in the coloring of inks, coatings, rubber products, plastic products, stationery and building materials. The variety of organic pigment color is endless and colorful, but there is a certain internal relationship between various colors. Each color can be determined by three parameters, namely hue, lightness and saturation. Hue is the characteristic of color distinguishing each other, which is determined by the chromatographic composition of the light source and the feeling of the wavelength emitted by the surface of the object on the human eye. It can distinguish red, yellow, green, blue, purple and other characteristics. Lightness, also known as brightness, is the characteristic value indicating the change of light and shade on the surface of an object. By comparing the lightness of various colors, the color can be divided into light and dark. Saturation, also known as chroma, is the characteristic value of the color on the surface of an object, which makes the color bright and dull. Hue, lightness and saturation make up a solid. With these three dimensions, we can measure color with numbers. But the basic colors are red and blue.
