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Grinding Glass Beads
Ground glass beads, appearance: colorless transparent sphere, smooth and round, without obvious bubbles or impurities.
Rounding rate: rounding rate ≥ 80%;
Density: 2.4-2.6g/cm3;
Refractive index: Nd ≥ 1.50;
Composition: sodium calcium glass, SiO2 content ＞ 68%;
Compressive strength: > 1200n;
Mohs hardness: 6-7.
