Tempered glass is safely glass ,and have high-mechanical behavior and safety function after glass broken ,its mechanical strength is 4-5 times of ordinary glass. Undergoing temperature changed from -40 to 327.5℃ without breaking, breaking into small pellet without acute angle, avoiding hurting to body of people, the products is widelyapplied to the site demanding the high-mechanical behavior and safety function such as communications and transportation, construct, family appliance, furniture. Coated glass wall and so on .