The Development History of Tempered Glass (2)

The first patent for glass tempering was obtained by the French in 1874. The tempering method involves heating the glass to a temperature close to the softening temperature and immediately immersing it in a relatively low temperature liquid bath to increase surface stress. This method is the early liquid tempering method. Frederick Siemens from Germany obtained a patent in 1875, while Geovge E. Rogens from Massachusetts in the United States applied the tempering method to glass wine glasses and lamp columns in 1876. In the same year, HughO'Heill of New Jersey obtained a patent.
In the 1930s, Saint Gobain Company in France, Treplox Company in the United States, and Pilkington Company in the United Kingdom all began producing large-area flat tempered glass for automotive windshields. Japan also carried out tempered glass industry production in the 1930s. From then on, the world began the era of large-scale production of tempered glass.
After 1970, Triplex Company in the UK successfully tempered glass with a thickness of 0.75-1.5mm using liquid media, ending the history of physical tempering not being able to temper thin glass. This was a major breakthrough in tempered glass technology.
The history of tempered glass in China began in 1955, with Shanghai Yaohua Glass Factory starting trial production. In 1958, Qinhuangdao Tempered Glass Factory successfully produced the product. In 1965, Yaohua Glass Factory in Qinhuangdao began producing tempered glass for military use. In the 1970s, Luoyang Glass Factory was the first to introduce Belgian tempered equipment. During the same period, chemical tempered glass from Shenyang Glass Factory was put into production.
Since the 1970s, tempered glass technology has been widely promoted and popularized worldwide. Tempered glass has been used in fields such as automobiles, architecture, aviation, and electronics, especially in the fields of architecture and automobiles, where it has developed the fastest.