... 3.whiteness:93min 4.Used for plastic,rubber,chemical,papermaking etc. Limestone Powder,building materials Application: 200mesh: as the ... additive in the feed 250-300mesh: whitewash the wall,plastic,rubber,waterproof ... 400-600mesh:toothpaste and soap 800mesh:rubber,pvc,plastic,electric cable 1250mesh:pvc,PE,coating,papermaking Properties: ...