Semi-tempered glass is also called Heat Strengthened Glass. It is a kind of between ordinary flat glass and tempered glass. It has the characteristics of high strength of tempered glass. At the same time, it avoids the flatness of tempered glass and is easy to self-explosion. Disadvantages such as overall crushing.
When the semi-tempered glass breaks, it is radially radial cracked along the crack source, and generally there is no tangential crack propagation, so the whole can not remain collapsed after the damage.
Semi-tempered glass is suitable for curtain wall and exterior window in buildings. It can be made into semi-tempered coated glass with image distortion better than tempered glass.