Supplier of Glass globules (Glass Beads) for Traffic Paint

We supply Quality level of the products :

1. Appearance: Transparent sphere, Clean and Round, No obvious bubble or impurity,
No Colored.
2. Specific Gravity: 2.3-2.5g/cm3
3. Refractive index: (20% method of dipping) 1.5-1.55.
4. Roundness: product of No.1>70%, others is >80%
5. Component: sio2>62%.
6. Waterproof Capability: To neutralize 100ml water, the 0.01M hydrochloric acid demanded is not more than 10ml.
Testing method: Products are tested by sample testing sieves, timed testing s