Tempering of glass involves heating the glass to the softening temperature (temp. 630-640 ° C) and cooling it in a stream of compressed air. Glass Tempering process takes a few seconds, then it is only the process of cooling down to room temperature. As a result, the surface layer stresses arise compressive-expansion, which significantly increases the strength of the glass. Tempered glass is safer, because after breaking disintegrates into tiny fragments, rather than needles. It is used, among others, the windows of cars.
Glass Toughens up three reasons
- increased mechanical strength-up to 3 times more impact resistant than ordinary glass
- increased heat resistance-up to 4 times greater than ordinary glass (4 mm float glass for the basic scope of the tempered glass is in the range from-50 to + 200th. (C) where for an ordinary glass of the same thickness:-20 to + 50th. (C))
- tempered glass is safe, glass shatters into tiny pieces while eliminating the risk of injury. In addition, each tempered glass has a machined edges (zatępione or ground) by which you can catch them safely in your hands.