Liufangzi Natural Sodium Bentonite PH 8.92 Montmorillonite over 70 percent Specific viscosity over 1.19 add or reduce 0.02 Liufangzi Brand Natural Sodium BentoniteBentonite Swelling Index ,ml/2g ,Chinese National Standard ≥24 Tested Report 24 ,Line Item QualifiedMethylene Volume,g/100g ,Chinese National Standard≥30 Tested Report 32,Line Item QualifiedFilter Loss Volume ,ml,Chinese National ...