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TEMPERED GLASSES: Glass tempering process increases the strength and resistance to thermal stress. Tempering process, glass is heated to 700 °. Then the the glass is quickly and suddenly cooled by dry air blowing. Meanwhile, surface shrivels up and gets harder. The interior remains hot for a while also keeping up with the outside begins to shrivel up. As a result, the pressure in the outer part, inner part consists of the tension and stresses. While the normal glasses are durable to 30 ° - 50 ° heat shock, tempered glasses are durable up to 300 ° heat shock. Divided into dice-sized pieces when broken has revealed the risk of injury to a minimum level suitable for use as safety glass. Mechanical Test of Tempered Glass  Â
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