Development history of tempered glass
The development of tempered glass dates back to the mid-17th century. There was a King of Rhine called Robert. He had an interesting experiment. He put a drop of molten glass in cold water and made a kind of Extremely hard glass. This high-strength granular glass is like a water drop, with a long, curved tail, called "Prince Robert Little". However, when the tail of the small grain is bent and broken, it is surprising that the whole small particle suddenly collapses suddenly and even becomes a fine powder. The above method is much like quenching of metal, which is quenching of glass. This quenching does not cause any change in the composition of the glass, so it is also called physical tempered, so the tempered glass is called tempered glass, also called tempered glass. The first patent for glass tempering was obtained by the French in 1874. The tempering method is to heat the glass to a temperature close to the softening temperature and immediately put it into a relatively low temperature liquid tank to increase the surface stress. This method is the early liquid tempering method. Germany's Frederick Siemens obtained a patent in 1875, and Geovge E.Rogens of Massachusetts, USA, applied the tempering method to glass wine glasses and lamp posts in 1876. In the same year, Hugh O'heill of New Jersey obtained a patent. In the 1930s, France's St. Ge's company and the United States' Trimblex company, as well as the British Pilkington Company, began to produce large-area flat tempered glass for the use of cars for windshield. Japan also carried out tempered glass industrial production in the 1930s. From this world, the era of large-scale production of tempered glass began. After 1970, the British company Triplex succeeded in tempering glass with a thickness of 0.75~1.5mm in liquid medium, ending the history of physical tempering and not tempering thin glass, which is a major breakthrough in tempered glass technology. The history of China's tempered glass was first introduced in 1955. Shanghai Yaohua Glass Factory began trial production. In 1958, the Qinhuangdao tempered glass factory was successfully trial-produced. In 1965, Qinhuangdao Yaohua Glass Factory began to produce tempered glass for military industry. In the 1970s, Luoyang Glass Factory first introduced Belgian tempering equipment. In the same period, Shenyang Glass Factory chemical tempered glass was put into production. In the 1970s, tempered glass technology was widely promoted and popularized around the world. Tempered glass began to be used in the fields of automobile, construction, aviation, electronics, etc., especially in construction and automobile. Suzhou Newstar Hardware Co.,Ltd is a professional Hand Tool bag manufacture located in Jiangsu Province China, including tool duffel bag, mechanic tools bag, Tool Bag set, etc. We could offer customers different kinds of tools bags with customized needs, such as material, size, type, pockets, handles, small inner pockets, name card, logo, etc. And also we are specialized in tools which could be put in tool bag, different combinations of Hand Tools, power tools and Garden Tools. Hand Tool Bag,Tool Duffel Bag,Mechanic Tool Bag,Tool Bag Set SUZHOU NEWSTAR HARDWARE CO.,LTD. , https://www.sjnewstarhardware.com