A pigment is a substance that gives an object its color. Some people directly refer to pigments as colorants. The pigment makes the pigment particles are protected, and in actual use, the problems caused by the settlement and flocculation of the pigment are avoided, and the direct exposure of the pigment particles on the surface of the film is avoided after the integrated pigment film, and the color fastness and weather resistance of the pigment are improved. When applied in paint printing and dyeing, it is even possible to achieve good printing and dyeing results without adding additional pure resin. In the application of inkjet printing, the rubbing fastness and washing fastness of the pigment have been significantly improved.

Generally, good quality pigments have the following performance characteristics:

1. Color. Color pigment is a pigment that selectively absorbs and scatters visible light, and can present colors such as yellow, red, blue, and green under natural light conditions.

2. Coloring strength. The ability of coloring pigments to absorb incident light. It can be expressed as a percentage of the relative tinting strength equivalent to the tinting strength of a standard pigment sample.

3. Hiding power. The ability to cover the surface color of the substrate in a film-forming substance. It is often expressed in grams of pigment contained in a color paint covering an area of 1 square meter.

4. Light resistance. The pigment maintains its original color properties under a certain amount of light. Generally, the eight-level system is used to represent it, and the eight levels are used.

5. Weather resistance. The ability of pigments to maintain their original properties under certain natural or artificial climatic conditions. Generally, the five-level system is used to express it, and the five levels are used.

6. Volatile substances. Mainly refers to moisture, generally not more than 1%.

7. Oil absorption. It refers to the number of grams of refined linseed oil required when 100 grams of pigment forms a uniform mass, and the oil absorption is better than the small amount of oil, which is related to the specific surface area and structure of the pigment particles.

8. Water-soluble matter. The substance contained in the pigment that can be dissolved in water, expressed as the mass percentage of the pigment. The water soluble matter of pigments used in paint making is often controlled below 1%.

Pigments are mainly used in coatings, inks, printing and dyeing, plastic products, papermaking, rubber products and ceramics and other industries, with the rapid development of the industry, the demand for pigments continues to expand, China's pigment industry development prospects are very broad. Usually common white titanium dioxide, black carbon black and other pigments are widely used, daily goods are everywhere, it can be said that pigment is a very large amount of raw materials.