... ,rubber,insulation,plastic,welding dry/wet ground muscovite mica powderForm:powder,flakes,scrap Size:10mesh- ... insulation,plastic,welding 1. Wet Ground Mica Powder SizeOverSieve %Sand %Loose DensityWaterLostWhitenessDia-thickRatio120µm/120mesh250 ... 1≤4.3>70>70 2. Dry Ground Mica Powder Size900µm/20mesh450µm/40mesh300µm/ ... , oilwell drilling and cosmetics, etc. dry mica powder for electric welding rod