1. size: 20~100,325,400,800,1000mesh 2. shape: powder 3. color: black 4. usage: rubber,coating,paint,decorate Packaging & Delivery:1 ... :mica biotite powder black powder size:20~100,325,400,800,1000mesh usage: rubber,coating,paint,decorate shape:powder1. Chemical Compositions: SiO2Al2O3 ... -200+32535±5-60+100<10-100+200<10-200+325<5-325<15100<5-200<3 4. Particle Standard of Super ...