закаленное стекло кружки

Tempered glass 1) has been processed by controlled thermal or chemical treatments 2) Made by processes which create balanced internal stresses which give the glass strength. 3) 6 times its strength compared with normal glass. 4) It will usually shatter into small fragments instead of sharp shards when broken, 5) Less likely to cause severe injury and deep lacerations. 6) As a result of its safety and strength, tempered glass is used in a variety of demanding applications, including passenger vehicle windows, glass doors and tables, as a component of bulletproof glass, for diving masks, and various types of plates and cookware.