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Glass marbles
It is used for toy and decoration.
Appearance quality
1. The diameter of the glass is from 11-25mm.
2. There should not be any other impurity such as oil stains, alkali, powder, rust etc.
3. It is free of stones, surface contamination or excessive air bubblesAppearance quality
Makeup | SiO2 | Al2O3 | B2O3 | Na2O | Fe2O3 |
Content (w %) | 67.5±1.0 | 1.0±0.3 | 23.0±1.0 | 8.0±0.5 | ≤0.2 |
Rate of qualification: ≥98%