4. Talc:
In industrial coatings, especially primers, talcum powder has good adhesion and is easy to polish. It can also play an anti-sagging role and has good construction performance. The disadvantage is that the oil absorption is high and it has matting properties. It is generally not used in high-gloss coatings. In addition, it is easy to powder and not weather-resistant. It is recommended to use less in outdoor coatings.