The middle part is the most solid glass, 5mm tempered glass, corners and edges are the weakest. The best way is to use safety glass hammer edges and corners, especially the middle of the top edge of the glass where once the glass has cracked, it is easy to block smashed. The middle part is the most solid glass, corners and edges are the weakest. The best way is to use safety glass hammer edges and corners, especially the middle of the top edge of the glass where once the glass has cracked, it is easy to block smashed. The glass or glass products through physical or chemical means, and the glass surface layer permanent stress uniformly distributed, Liaocheng glass to obtain a processing method of high strength and high thermal stability is called tempered glass. The glass is heated to a certain temperature, and then the glass in accordance with the requirements of rapid cooling rate, tempered glass windows, internal glass have a great permanent stress, can make the mechanical properties of silicate glass has been greatly improved, this approach called glass physical steel (or hardening). Glass factory _ Yaohui quality (Online) _ tempered by Jinan Shandong Glass Co., Ltd. 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.