What Is Tempered Glass?

Tempered is another word for toughened. Toughened glass is a type of safety glass processed by controlled thermal or chemical treatments to increase its strength compared to normal glass.

Tempering puts the outer surfaces into compression and the inner surfaces into tension. Such stresses cause the glass, when broken, to crumble into small granular chunks instead of splintering into jagged shards as plate glass (aka: annealed glass) creates. The granular chunks are less likely to cause injury.

Where Is Tempered Glass Used?

Tempered glass is used in applications where standard glass could pose a potential excess danger, since it is 4-5 times stronger than standard glass and does’t shatter into large shards when broken. Made with a process of extreme heating and rapid cooling, tempered glass is significantly harder than regular/normal glass.

Toughened glass is used in a variety of demanding applications, including vehicle windows, shower doors, architectural glass doors and tables, refrigerator trays, mobile screen protectors, as a component of bulletproof glass, for diving masks, and some kitchen cookware.

Tempered Glass: Simple Definition

Tempered glass is made by putting the outer surfaces into compression and the inner surfaces into tension. This kind of compression makes the glass shatter into a multitude of tiny pieces upon impact. Tempered is different than annealed, you can read about annealed glass here at tempered vs annealed glass.