Korea, South Glass Export / Clothing Fashion

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