Tempered glass, also known as toughened glass, is created by heating and rapidly cooling a pre-cut standard piece of glass in a tempering furnace. The pre-cut and edged piece of glass is heated up to around 1200°F. After being heated up; the glass is then cooled rapidly. This process is known as quenching.

Quenching produces a hardened piece of glass that is four to five times stronger than before the tempering process. The final product tempered glass is harder to break. Tempered glass is most commonly used for passengers windows on cars while laminated glass makes up your front and rear windshield most of the time. When tempered glass breaks, it is designed to shatter into small pieces that are less likely to cause added injury or damage.

The combination of laminated and tempered glass is certainly possible but very difficult. When manufacturing laminated tempered glass, the thickness of PBV used has to be just right, or the glass is useless. If manufactured successfully, laminated tempered glass can have many useful applications. A number of car manufacturers are using this technology in their windows now.