... 20~100,325,400,800,1000mesh 2. shape: powder 3. color: black 4. usage: rubber,coating, ... receipt of prepayment Specifications:mica biotite powder black powder size:20~100,325,400,800,1000mesh ... 280 degree3. Particle Standard of Primary Mica Powder: Specs Content20 mesh40 mesh60 mesh100 meshmesh%mesh% ... -200<3 4. Particle Standard of Super Fine Mica Powder: Specs Content325mesh(45u)600mesh(30u)1000mesh( ...