... best filling materials for paint, printing ink, carbon, fiber, GRP, leatheroid, rubber, plastic, petroleum field( ... glass spheres, in comparison to less expensive fillers.Main Usage of cenosphere1. Paints and ink: ink, bond, vehicle putty, insulating, antiseptic, fireproof ... paints.2. Plastics: the products of POM ,PA,PBT,PET,PP and so on. Like panels, boards, vehicle decorations, glass fiber ...