Tempered Glass Features Safety: When broken, it become into alveolate-like granule with obtuse angle, which will not do any serious harm physically. High strength: with 4-5 times the strength of common glass, in general. Bending: Its defection is bigger than common glass by 3-4 times. Heat stability: it has a good heat stability which can endure 3 times the temperature of common glass; it can endure a range of 300C degree temperature change. Semi-Tempered Glass Features Semi-tempered glass is also called as reinforced glass, It has a different surface stress from Tempered Glass. It has 1.6-2 times the strength of common annealed glass and good heat stability. Semi-tempered glass has a smoothness and light transmittance more close to that of common annealed glass, while is much better than that of tempered glass.