1. Color of pigment: The result of the selective absorption of white light components by the pigment. The physical properties of pigments, such as dispersion, affect the color within a certain extent, because the degree of dispersion affects the reflection of pigments, generally the smaller the particle size, the deeper the tone, the greater the brightness. 2. Hiding Power: the pigment in the paint film can cover the surface of the film, is it can not through the film and the ability to reveal. 3. Coloring Power: a color and another color after mixing the ability to form a strong or weak color, coloring power, use less. 4. Oil Absorption: The size of the pigment oil absorption and the degree of dispersion, but is not determined by the dispersion alone. 5. Particle Size: not only determines the characteristics of the pigment, but also determines the quality of the film. 6. Light fastness: Pigments in the role of light, color has different degrees of change. Kill. POWDERING: After a certain period of exposure to the sun, the film in the film was destroyed, the surface of the pigment can not be firmly continued in the film, and from the film, forming a powder layer, can be wiped off or washed off with water. This phenomenon is called pulverization. 8. Organization 9. MOISTURE: Pigment Moisture is too high, often to paint caused many problems. 10. Heat Resistance 11. Solvent resistance 12. Acid and Alkali resistance 13. Relative density and specific volume