Before understanding tempered glass, we must first know what glass is? Glass is an amorphous inorganic non-metallic material, generally composed of a variety of inorganic mineral raw materials (such as quartz sand, borax, boric acid, barite, limestone, barium carbonate, feldspar, soda ash, etc.) plus a small amount of auxiliary raw materials. Its main components are silicon dioxide and other oxides.

The production of tempered glass is divided into physical tempering and chemical tempering. According to the degree of tempering, it can be divided into full tempered glass, semi-tempered glass and partial tempered glass. Physical tempering is divided into air cooling, liquid cooling and particle tempering. It heats the glass to a certain degree in a tempering furnace, and then cools it down evenly and rapidly, thereby obtaining tempered glass. The equipment for physical tempering is mainly a tempering furnace, which consists of two parts: heating and quenching. The conveying method is horizontal and vertical tempering furnaces. At present, the most commonly used tempering method in the world is the horizontal roller tempering method. The hardness of the glass increases after tempering and becomes 4-5 times the hardness of ordinary glass. Therefore, tempered glass is also called safety glass.

Tempered glass generally cannot be further processed after processing. Cutting, punching, slotting, etc. are not allowed. If the size is not suitable, it can be polished on an edging machine if the difference is not large, but the amount of grinding is limited, usually each side cannot be greater than half the thickness of the glass. For example, 8mm tempered glass can be worn away up to 3mm.