... materials. This product is a fine natural calcium carbonate powder. Concentrated particle size distribution, high whiteness, manufactured from the high ... pigment used in paper making, plastic and paint industries.The calcium carbonate ML-1003, whiteness:95%,sedimention:20%,PH:8-9,325mesh ... %,DV50:10%,specific area:10000. Packing: 25kg paper plastic bags. calcium carbonate