... fly ash is one of the best filling materials for paint, printing ink, carbon, fiber, GRP, leatheroid, rubber plastic cenosphere ... is one of the best filling materials for paint, printing ink, carbon, fiber, GRP, leatheroid, rubber, plastic, ... to less expensive fillers.Main Usage of cenosphere1. Paints and ink: ink, bond, vehicle putty, insulating, antiseptic, fireproof paints.2 ...