... %min 2.Size(mesh): 325 1250 etc 3.whiteness:93min 4.Used for plastic,rubber,chemical,papermaking etc. Limestone Powder,building materials ... adopted the technics of particular multi-selection and secondary depolymerization.2.feature:poison free,odour free,high purity,high heat stability ... .4400MESH940.3980.30.4325MESH940.4980.30.4 E07109, Limestone Powder, building material