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Description:Specifications of sodium base-bentonite: 1) SiO2: 70+2% 2) Al2O3: 15.9 +1.5 % 3) Fe2O3: 2.3+0.1% 4) FeO: 0.95+0.1% 5) CaO: 0.96+0.1% 6) MgO: 1.91+0.1% 7) NaO: 1.80+0.1% 8) P2O3: 0.04+0.01% 9) TiO2: 0.04+0.01% 10) K2O: 0.78+0.1% 11) Caustic soda: 0.55+0.1% 12) Moisture: 10% max. 13) Swelling index: Me/g more than or equal to 20 14) Ph value: 9 - 10 Specification of calcium base-bentonite 1) SiO2: 68 - 72% 2) Al2O3: 13.5 - 16.5% 3) Fe2O3: lower than 1.9% 4) MgO: 2.3 - 2.5% 5) CaO: 2.4 - 2.6% 6) TiO2: lower than 0.10% 7) K2O: 0.9 - 1.1% 8) Na2O: 0.3 - 0.5% 9) L. O. I: lower than 6.5% 10) Size: 20 - 320 meshes 11) Moisture: 15% max. 12) Swelling index: 8 - 12 mlg 13) Sand content: 1% max. 14) Ph value: 6.7 - 7.2 Packing: PP woven bag