Temperedglass surfaceafterforming a uniformcompressive stress,thetensile stress is formedinsideof the glasscan be greatly improvedcompression resistance, tensile strengthrating is3times higher thanthe latter,the latterimpact forceismore than 5 times.Fragments ofbrokenglasswillform a uniformgranular, and noknife-likesharp corners, so calledsafety glass.
