[China Glass Net] 1. Watch the glass with polarized sunglasses and the surface of the tempered glass. The surface of the tempered glass should have colored streaks. The ordinary glass does not. The naked eye sees the glass through the side under the light, and there will be on the tempered glass. Blue spots.
2. Look at the mark inspection certificate Since the safety glass product certification was carried out in 2003, most of the construction tempering/laminated glass manufacturers in the country have passed the product certification. The enterprise must screen or paste the CCC mark on the product body for sale, or The CCC mark is applied to the minimum outer packaging and accompanying documents (such as certificates of conformity).
When purchasing a product, first check whether there is a CCC mark, and check whether the manufacturer of the product has passed the compulsory product certification (with CCC certificate and valid) according to the company information, factory number or product certification certificate number, etc. Whether the model specification is within the scope of the company's ability to pass the compulsory certification, and whether the status of the certificate is within the validity period.
3, touch the surface to find the degree of flatness of the tempered glass will be worse than ordinary glass, the hand touched the surface of the tempered glass, there will be a bumpy feeling. Observing the longer side of the tempered glass, there will be a certain degree of curvature. The flat tempered glass products in GB15763.2-2005 standard requirements bow bending should not exceed 0.3%, the wave bending should not exceed 0.2%, the two larger tempered glass close together, the arc will be more obvious
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