Tempered glass is manufactured through tempering process in tempering furnace.the glass is uniform cooling after heated to the softening point,to improve the strength of the glass, often use the method of chemistry or physics, in glass surface formation pressure stress, glass bears offset above all when outside force surface stress, so as to increase the load bearing ability, strengthens the glass itself of wind sex, continual sex, impact, etc.Thermal shock resistance of tempered glass is also better than float glass.