item
calcium carbonate (CaCO3) content ………………… ≥ 98%
Iron content (Fe) ………………… ≤0.1%
Muriatic acid insolubles content………………≤0.2%
Moisture and volatile content …………… ≤0.3%
Density (g/cm3) ……………… ≤2.9
Mohs hardness ……………… ≤3.0
Whiteness (degree) ………………… ≥94.0
Oil absorption (ml/g) ……………… 16-25
Ph ……………………………………….. 8-9
Heavy metal(Pb)%≤…………………………………………