... 1.PPT silcia (particle size 3-8um). 2.Special for paints, coating,ink. 3.high BET,pure min98%. 4.superfine ... powder. PPT silica for paints (98%)precipitated sio2 powderHigh BET and oil absorptionSpecial for ... paints, coating, inks, etc.Particle size 3-8 um. ... %≤0.05Na2SO4 content%≤0.2 PPT silica for paints (98%)