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Tempered glass Tempered glass is the ordinary annealed glass first cut into the required size, and then heated to about 700 degrees close to the softening point, and then quickly and evenly cooled (usually 5-6MM glass at 700 degrees high temperature heating for about 240 seconds, cooling for about 150 seconds. 8-10MM glass is heated for about 500 seconds at a high temperature of 700 degrees and cooled for about 300 seconds. In short, according to the different thickness of the glass, the choice of heating and cooling time is also different). After tempering, uniform compressive stress is formed on the surface of the glass, and tensile stress is formed inside, so that the bending and impact strength of the glass can be improved, and its strength is about four times more than that of ordinary annealed glass. Has been tempered tempered glass, can not be any cutting, grinding and other processing or damage, otherwise it will destroy the uniform compressive stress balance and "shattered".