Tempered glass is an extension product of ordinary flat glass. Before tempering, it can be cut and punched arbitrarily with glass cutting machine, that is to say, it is ordinary glass at this time. But once tempered, it can not be processed again, which is its characteristics. Toughened glass is a kind of prestressing glass. The impact strength and flexural strength of toughened glass with the same thickness are 3-5 times as that of ordinary glass. It also has good thermal stability. It can withstand three times the temperature difference of ordinary glass, and it can withstand the change of temperature difference at 200 C. This is its advantage.

    The disadvantages of tempered glass are:

The toughened glass can not be cut and punched any more. It can only be processed to the desired shape before toughening and then toughened.

   Although the strength of tempered glass is stronger than that of ordinary glass, tempered glass has the possibility of self-explosion (self-rupture) when the temperature difference changes greatly, while ordinary glass does not have the possibility of self-explosion.

    At the same time, there will be bumps on the surface of glass. The severity depends on the quality of the equipment. This is also the reason why tempered glass can not be used as a mirror.