Clear Tempered Glass
Clear tempered glass, also referred to as safety glass or toughened glass is processed by controlled heating process that increases its relative strength vs normal anealed glass. The tempering process causes the exterior of the glass to compress and creates tension on the interior of the glass. Such stress cause the glass, when broken, to crumble into small granular chunks instead of splintering into jagged shards as plate glass (a.k.a. annealed glass) does. These small pieces are less likely to cut someone or cause injury.