Rheology control, suspension and stability behavior, adsorbent, free-flow of powders, anti- setting, anti-sagging, anti-blocking, reinforcement, pigment stabilization & dispersion, print defi- nition, anti-setoff, mechanical/optical properties improvement, thixotrophy, thickening, hydro- phobicity control, and improved processability. Model numberY-150 Specific surface area (bet)150010 Appareat density40--60 Ph-value in 4% dispersion3.6---4.5 Silica content010 10kg/bag