... % 3.Whiteness:93%min 4.Material:mineral toothpaste calcium carbonate 1.useage:plastic, rubber,papermaking,paint,rubber,feed ... oil absoption,good dispersibility.3.variety:light calcium carbonate,heavy calcium carbonate,activated calcium carbonate.4.specification:CaCo3(%)98.5Fe2O3(%)0.05Al2O3(%) ... Asian , Europe .9.sample:free10.Relative product: French chalk,vermiculite, color sand ,perlite etc.