... 250-300mesh: whitewash the wall,plastic,rubber,waterproof material 350-400mesh:gusset plate,chemical,pipe 400-600mesh: ... 1250mesh:pvc,PE,coating,papermaking Properties:1.process:selects high purity limestone as raw material, is made through process ... high heat stability,low oil absoption,good dispersibilityTypical Physical Properties: INDEX NAMEresultCaCo3 content ≥98Whiteness≥94PH value ≤10average ...