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