Safety glass: Pre-stressed lasts longer.
When very high requirements are put on glass sheets, the so-called safety glass is often the only answer. Experts differentiate between the single-layer safety glass (ESG) and laminated glass (VSG).
Safety glass is principally so-called "pre-stressed glass". This glass was melted at maximum temperatures and then cooled suddenly. With this process, tensile stress develops in the core of the glass and compression stress on the surface.
Safety glass is marked both by its impact-resistance and its resistance against large and abrupt temperature changes. Because of its "pre-stressed" properties, safety glass shatters into crumbs with dull edges in case of emergency.