Tempered glass is produced by heating annealed glass in a furnace to 620°C. Progressing from the furnace, the glass is rapidly cooled with jets of cold air, inducing compressive stresses to the surface while the center remains tensile.
4-5 times stronger than annealed glass of the same thickness.
Stronger resistance to thermal breakage than annealed or heat strengthened glass
If breakage occurs the glass breaks up into small, cubical fragments, which are not threatening to humans.
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