... calcium plastic materials. This product is a fine natural calcium carbonate powder. Concentrated particle size distribution, high whiteness, manufactured from the ... making, plastic and paint industries.The calcium carbonate ML-1003, whiteness:95%,sedimention:20%,PH:8-9,325mesh 0.1% residue, DOP ... :10%,specific area:10000. Packing: 25kg paper plastic bags. calcium carbonate