Tempered glass has good thermal stability, can withstand the temperature difference is 3 times of ordinary glass studio glass, can withstand 300 ℃ of temperature changes. General life of 15 years, but this depends on your usage. Process Category: Physics and chemistry glass glass. The difference is that the former is realized by heating, which is achieved by a chemical reaction. Glass Tempering first patent in 1874, obtained by the French, tempered glass method is heated to its softening temperature glass, immediately put into a relatively low-temperature liquid bath flat glass, the surface stress increase. This method of liquid steel that is earlier methods. Germany Frederick Siemens awarded a patent in 1875, Massachusetts Geovge E. Rogens in 1876 steel method is applied to glass tumblers and lamppost. In the same year, New Jersey HughO'heill obtain a patent. Glass cabinet _ Yaohui glass quality (certification) _ Zaozhuang glass by Glass Co., Ltd. Jinan Yaohui. Jinan Yaohui Glass Co., Ltd. (www.jyhhc.com/) Shandong Jinan, architectural glass leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Yaohui glass in Jinan leadership with the staff warmly welcome all inquiries negotiations to create the Jinan Yaohui glass better future.