Bentonite Good quality Competitive price Large stock,Delivery in time!! Contact us now!! ... for our company’s bentonite products: Ca-bentonite/Na-bentonite quality index Application fieldsItemCa-bentoniteNa-bentoniteMechanical castingGreencompression strength , Kpa≥50> ... t2.5-8.7<8.7 The refined Na-bentonite quality indexItemIndexWhiteness,%≥75Size,mesh300Colloidindex,ml/15g±≥90PH value8-10.5Moisture,%≤ ...