tempered glass

tempered glass

[¦tem·pərd ′glas] (materials) Glass that has been prestressed by heating followed by sudden quenching to give it two to four times the strength of ordinary glass. Also known as toughened glass.

tempered glass

1. Annealed glass reheated to just below the softening point and then rapidly cooled with water. When fractured, it breaks into relatively harmless pieces. See also: glass2.

tempered glass

(US), toughened glass (Brit.) Glass having two to five times the strength of ordinary glass as a result of having been prestressed by heating and then suddenly quenched; the rapid cooling produces a compressively-stressed surface layer.