... ground mica powder highly improve mica’s application in resin and plastics (engineering plastics: PA66, PPR pipe), paint(corrosion ... barite powderUsage: widely used as drilling mud in oil and gas, filler in painting and coating, plastic, rubber, ceramic, ink, paper making ... widely used as a weighting agent for drilling fluids in oil and gas exploration which can meet API or OCMA standards. Besides, ...