Tempered or tempered glass is a type of safety glass that is treated with heat or chemical treatments tuned to increase its strength compared to ordinary glass. Stirring puts the outer surfaces into stress and the interior in a tense condition. Such pressures cause the glass to collapse into small granular pieces, when broken, rather than breaking them into rough pieces as happens.
Insulating glazing or insulating glass is a glass unit for thermal insulation, which is made up of two or more layers of glass separated from one another and sealed tightly to form a glass unit that contains an amount of air between each of the two layers of glass. These units are used to improve the thermal performance of glass at home.
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