... 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, petroleum field( ... glass spheres, in comparison to less expensive fillers.Main Usage of cenosphere1. Paints and ink: ink, bond, vehicle putty, insulating, antiseptic, ...