... substitution, good uniformity of substitution,Mainly used in oil drillingdrilling fluids CMC : 1, high degree of substitution, good uniformity of ... grade Product: PAC-LV, PAC-R, CMC-LV, CMC-HV TYPES AND SPECIFICATION CMC (API-13A.B) Property TypeViscosity ( Dial reading ... max. CMC-HV30 min.30 min.30 min.10 max.TYPES AND SPECIFICATION PAC PropertyType Test ProcedureViscosity600rpm, Fann 35 in seawater ...