Tempered glass, also known as tempered glass. It is a physical or chemical method, on a glass surface to form a compression stress layer glass door, the glass itself has a high compressive strength, will not cause damage. When tempered glass by external force, the pressure level can be partially offset by the tensile stress, avoid glass fragmentation, although glass internal tensile stress state in 12 large glass, but no defect exists inside the glass, not would create havoc in order to achieve the purpose of improving the strength of glass. Tempered glass has good thermal stability, can withstand the temperature difference is 3 times of ordinary glass window glass can withstand 300 ℃ of temperature changes. General life of 15 years, but this depends on your usage. Process Category: Physical and chemical glass glass. The difference is that the former is realized by heating, which is achieved by a chemical reaction.