Precipitated silica While carbon black, chemistry name "silicon dioxide" , main ingredient "sio2", similar to carbon black in the application , appearance showed white , highly dispersed , amorphous powder or flocculent powder. Main application: White carbon black is widely used as reinforcing agent for rubber and plastic , thickening agent for ink , additives for coating , and paint , flatting agent for leather , dispersing agents for insecticides , fillers for manufacturing papers , additives for resin , fillers for insulating and thermal insulation materials . Meanwhile , it is also used as open agent for polyethylene film and carriers, anti caking agent for food , pesticide and medicine. Package: 20kg or 10kg/ woven bag Package: 20kg or 10kg/ woven bag