1 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.
2 4-5 times stronger than annealed glass of the same thickness.
3 Stronger resistance to thermal breakage than annealed or heat strengthened glass
4 If breakage occurs the glass breaks up into small, cubical fragments, which are not threatening to humans.
