... the feed 250-300mesh: whitewash the wall,plastic,rubber,waterproof material 350-400mesh:gusset plate,chemical,pipe 400-600mesh:toothpaste and ... ,papermaking Properties:1.process:selects high purity limestone as raw material, is made through process of calcining.chemical reaction,reselection.dehydration ... .3980.30.4325MESH940.4980.30.4 E07109, Limestone Powder, building material