... . Petroleum grade Product features:1, high degree of substitution, good uniformity of substitution .2, high transparency, viscosity and water ... volum, reduce filteration loss .6, has excellent performance in drilling of oil .specification RequirementPAC-HVPAC-LVAppearanceFree-flowing powderAPI filtrate volume ... :At 0.57%(2ppb) of PAC concentration, ml≤20≤25At 0.86%(3ppb) of PAC concentration, ml≤15≤ ...