... of clean, transparent, no bubbles and impurity, widely used in blasting, polishing, grinding etc. ... that it widely used in blasting, polishing, grinding etc. Chemical AnalysisPhysical PropertiesSiO2≥65. ... Used in painting, and ink industries, magnetic, pharmaceutical, papermaking, china-clay and rubber industries.5. Used in reflective material for road marking lines. Glass beads for grinding and ...