Heat treated glasses
Heat treated glasses have two more types:
Tempered/ESG glasses These type of glasses get a special heat load, which results in the transformation of their crystalline structure and makes the glasses up to ten times more resistant to outer physical impacts than traditional glasses. If it does break, however, it breaks into very little pieces, thus it cannot cause serious injuries.
Heat strengthened/TVG glasses These glasses also get a special heat load similarly to tempered glass, but the duration of quenching is not as short as in the case of tempered glass. The transformation of crystal structure appears here, too, which allows the glass to be ten times more resistant to outside physical impacts than traditional glasses. However, after breaking it does not break into small pieces but the fragmentation shows a ’V’ form with pieces tightly set against each other..