... :93min 4.Used for plastic,rubber,chemical,papermaking etc. Limestone Powder,filler in printing inkApplication: 200mesh: as the additive ... wall,plastic,rubber,waterproof material 350-400mesh:gusset plate,chemical,pipe 400-600mesh:toothpaste and soap 800mesh:rubber, ... as raw material, is made through process of calcining.chemical reaction,reselection.dehydration,drying and depolymerization.It is adopted ...