Refers to hardened glass treatment, with good mechanical properties and heat seismic performance of glass. It is a physical or chemical method, on a glass surface to form a compressive stress layer, the glass itself has a high compressive strength, will not cause damage. When the glass by external force, the compressive stress in the glass surface 95MPA, this pressure level can be partially offset by the tensile stress, thereby improving the carrying capacity, there are two main advantages of tempered glass, the first is the number of improved strength than ordinary glass times, bending strength is 3-5 times that of ordinary glass, impact strength is 5-10 times that of ordinary glass, showed no acute angle after crushing small pieces reticulate reticulate crack, avoid fragmentation of glass, giving cause significant injury.