Glass Beads for blasting

Appearance: round, clean, transparent and free of bubbles and foreign matters
Specific gravity: 2.4-2.6g/cm?
SiO2: 70% min;
Roundness: >425?m 70%min, <425?m 80%min; Micro hardness:630kg/mm? min.
Index of refraction: 1.5 min;
Waterproof: neutralized by 0.01N, HCL< 10ml
pH: 7.2;
Micro hardness: 630kg/mm?.

1) 850-425?m;
2) 425-250?m;
3) 300-180?m;
4) 250-150?m;
5) 212-106?m;
6) 150-75?m;
7)106-53?m;
8) 90-45?m;
9) 53-45?m

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