Physical Properties of Pigments

1. Density

The density of organic pigments is 1.0-2.0g/m3, and the density of inorganic pigments is 1.8-8.8g/m3.

2. Specific surface area

Usually, organic pigments and inorganic pigments are 10-100m2/g and 5-50m2/g, respectively.

3. Granularity

Since the size of the pigment particles has an effect on its shade, light fastness, hiding power, and tinting strength, although the size of the pigment particles of different varieties is different, they should be controlled within an appropriate range. The particle size of pigments can range from very small colloidal particles (about 0.01 μm) to larger particles (about 100 μm). It can be seen that the pigment is a fine particulate matter.

4. Crystal form

Most commercial pigments exist in a crystalline state, and isomorphism is very common.

5. Dispersion and dispersion stability

The pigment is highly dispersed in the medium in which it is used in a solid state, it is insoluble in the medium in which it is dispersed, and the physical and chemical properties of the pigment are basically unchanged by the dispersion medium. The degree of dispersion and the stability of the dispersion system directly affect the properties of inks, coatings, plastic products and textile fibers.