Tempered glass/Reinforced glass is a type of safety glass. Tempered glass is actually a kind of prestressed glass, in order to improve the strength of glass, usually using chemical or physical methods, forming compressive stress on the surface of glass, glass under external force first offset surface stress, thereby improving the bearing capacity, enhance the glass itself to resist wind pressure, cold and heat, impact, etc. Note the distinction with fiberglass.
1, by the light spot
Wear polarized sunglasses to see the glass, the surface of tempered glass should present a color stripe spot, ordinary glass does not; With the naked eye in the light through the side of the glass, tempered glass will have blue spots.
2, look at the sign to check the certificate
Since the development of safety glass product certification in 2003, most of the country's building tempered/laminated glass production enterprises have passed the product certification, enterprises must sell products on the screen or paste CCC mark, or in its outer packaging and attached documents add CCC mark.
Of choose and buy when the product first to see if any CCC mark, and according to the enterprise information and factory number or product certification certificate number through the network to see whether the products production enterprises through the mandatory product certification, product model specifications in the enterprise has passed the compulsory certification of competence, whether certification status in the period of validity.
3, touch the surface to find radians
The flatness of toughened glass can be worse than common glass, touch toughened glass surface hard with the hand, can have concave-convex feeling. If you look at the longer side of tempered glass, there will be a certain radian. Flat tempered glass products in the GB157632-2005 standard requirements of bow bending should not exceed 0.3%, waveform bending should not exceed 0.2%, the two larger tempered glass together, radian will be more obvious.