Ordinary annealed glass, tempered glass is cut to the required size of 8mm tempered glass first, then heated to near the softening point of glass tables, then get rapid and uniform cooling. After treatment of steel glass surface to form a uniform compressive stress, and the internal tensile stress is formed glass table, the performance of the glass can be greatly improved, more than three times the tensile strength of the latter, the impact force is more than five times the latter . Tempered glass can see colored stripes on the side of the glass through the polarizing plate, and in the surface layer observation glass, you can see the black and white spots. Polarizing sheet can be found at the camera lens or glasses, to adjust the light source observed, it is easier to observe. General civilian tempered glass is ordinary glass by a heat treatment process to enhance the strength of 3-5 times, can withstand a certain energy of external impact or changes in temperature without breaking, even if broken, is obtuse piece of shattered glass honeycomb-like small particles and difficult to wounding tempered glass, which has a certain degree of security. Tempered glass can not be cut, you need to cut before tempering a good size, and there is "blew" feature. Depending on the application, it can be divided into fully tempered glass, semi-tempered glass, the regional glass, flat glass, curved glass and other types.