13 properties of pigments

1. The color of the pigment: it is the result of the selective absorption of the white light component by the pigment. The physical properties of the pigment, such as dispersibility, affect the color within a certain limit, because the degree of dispersion affects the reflection conditions of the pigment. Generally, the smaller the particle diameter, the darker the hue and the greater the brightness.
2. Hiding power: The pigment in the paint film can cover the surface that bears the film, which is the ability of it to not be revealed through the film.
3. Tinting strength: The ability of a certain color to be mixed with another color to form the strength of the color, the stronger the tinting strength, the less the dosage.
4. Oil absorption: The size of the pigment oil absorption material is related to the degree of dispersion, but it is not determined by the degree of dispersion alone.
5. Particle size: not only determines the characteristics of the pigment, but also determines the quality of the coating film.
6. Light fastness: Under the action of light, the color of the pigment changes to varying degrees.
7. Pulverization: After a certain period of exposure to the sun after the coating film is made, the film-forming material in the coating film is destroyed, and the pigment on the surface cannot continue to be firmly in the coating film, but falls off from the coating film to form a powder layer, which can be wiped off or rinsed off with water. This phenomenon is called chalking.
8. Organizational composition
9. Moisture: The pigment moisture is too high, which often causes many problems to the paint.
10. Heat resistance
11. Solvent resistance
12. Acid and alkali resistance
13. Relative density and specific volume