Fillers, also known as extender pigments, are white and colorless pigments with low refractive index, without coloring and hiding power. The application of extender pigments earlier was to increase the volume of the paint, play a filling role, and reduce the cost of the paint. With the development of coating technology, extender pigments can also improve the performance of various aspects of coatings. In paint films, extender pigments are used to improve the leveling, impermeability, gloss, etc. of coatings, and also play a role in improving the mechanics of coating films. Performance, making the paint film durable, hard and wear-resistant. The extender pigment can more effectively improve the hiding power of the white powder, increase the solid content of the paint, and reduce the voe value of the paint.
There are mainly two types of body pigments: natural and synthetic. The classification of body pigments is shown in the table
