... used for fluid loss control. PAC-HV is high-viscosity polyanionic cellulose (PAC) offered by our company, to be used as ... can also increase viscosity of the drilling mud. Drilling PAC polyanionic cellulose low viscosity, fluid loss reducing agent, used in water ... : in 25kgs multiwall paper sack, or 25lbs multiwall paper sack Polyanionic cellulose