... belongs to smectite(including calcium,sodium,sodium-calcium,magnesium smectite),made from shelling,dispersing,purifying,grading and special ... materials in high molecular material industry.It can omprove the properties of shock resistance,anti- ... hydroxide,Calcium carbonate,Silicon dioxide,Pulvistalci.etc.We have our own production line and R& ... Yuantai Chemical!Thank you Natural Sodium Bentonite Powder