Ruitong Talc powder for Coating Specification Premium First-class Qualified Whiteness e 92.0 90.0 88.0 Size: 45¼ m passing rate e 99.0 98.0 97.0 Particle size distribution e < 20¼ m 95 80 70 < 10¼ m 70 50 40 < 5¼ m 40 30 20 Moisture d 0.5^ 1.0 Oil Adsorption 20.0^ 50.0 20.0^ 50.0 20.0^ 50.0 LOI( 1000 ) d 7.00 8.00 28.00 Water soluble d 0.5 0.5 0.5 PH 7.0^ 9.0