... , no bubbles and impurity. widely used in blasting, polishing, grinding etc. Glass beads with the quality of clean, transparent, no ... that it widely used in blasting, polishing, grinding etc. Chemical AnalysisPhysical PropertiesSiO2≥65.0%Bulk Density1.5g/cm3Na2O≤14. ... tube and non-ferrous alloy precision casting etc.4. Used in painting, and ink industries, magnetic, pharmaceutical, papermaking, china ...