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Yongqing Ziguang Glass Beads Co.,Ltd.
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About Us
Appearance Round,Clean,Transparent and free of bubbles and foreign matters.
Specific gravity 2.4-2.6g/cm3
Roundness >850占�80min
PH 7.2
SiO2 70%min
Waterproof neutralized by 0.01N HCL<10ml
Micro hardness 630kg/mm2
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