Detailed Product Description Specification:itemsindexDescriptionCalcium based BentoniteMajor Function Viscosity AgentTesting specificationPer API spec 13A600 rpm reading30 minYield Point / Plastic Viscosity ratio3 maxFiltrate volume, ml15 maxResidue ( 75 micron wt % ) 4.0 maxMoisture, wt %10 maxProperties:bentonite that used in foundry, metallurgy, well drilling slurry, food, oil, agriculture, ...