the nature of the pigment

 1 Color pigment: a pigment component of the white light selective absorption results. Physical properties of the pigment dispersion, within certain limits affect the color, because the pigment dispersion effect reflection condition, generally the smaller the particle by, the deeper the color, the greater the brightness.
(2) Opacity: pigment in the  tin stabilizer paint film that can be exposed from the coating film covering the surface of the coating film is that it is not exposed through capability.
3. Tinting strength: a color with another color mixing ability to form color intensity, tinting strength, dosage less.
4 Oil absorption: the size of the pigment oil absorption and dispersion degree, but not alone decide the  white blowing agent degree of dispersion.
5 particle size: not only determines the characteristics of the pigment, but also determines the quality of the coating.
6 Lightfastness: pigment under the action of light, color, there are different degrees of change.
7 chalking of: forming a coating film after a certain time after the exposure, the coating film of the film-forming material is damaged, the pigment on the surface of the coating film can not firmly continue, the fall off from the coating to form a powder, layer may be erased or washed away with water. This phenomenon is called pulverization.
8 institutions
9 Moisture: pigment moisture is plastic processing aid  too high, often to the paint caused many problems.
10 Heat resistance
11 Solvent Resistance
12 acid and alkali resistance
13 relative density and specific volume