Tempered glass is a type of glass with even compressive stress on the surface which is made by heating float glass to nearly softening point and then cooling it down rapidly by air. During the instant cooling process, the exterior of glass is solidified due to rapid cooling while the interior of glass is cooled down relatively slowly. This process will bring the glass surface compressive stress and the interior tensile stress which can improve the mechanical strength of glass by germination and result in good thermal stability.

 Feature
1. Safety: Glass is not easy to be broken when attacked. Broken glass particle is of honeycomb shape with obtuse angles which will not cause severe hurt to human body.
2. High mechanical-resistant strength: Impact-resistant strength of tempered glass is 3-5 times higher than that of float glass of the same thickness.
3. Thermal stability: Thermal stability of tempered glass is 3 times higher than that of float glass of the same thickness. Tempered gl