The main methods for tempering glass are physical tempering and chemical tempering.

The so-called physical tempering method is a production method that heats glass to a temperature close to its softening temperature, and then simultaneously blows air on both sides to rapidly cool it, in order to add mechanical strength and thermal stability to the glass. The quenching of heated glass is an important step in the production of tempered glass by physical tempering method. The basic requirement for glass quenching is to cool quickly and evenly, and then obtain uniformly distributed stress. In order to obtain uniformly cooled glass, it is necessary to require the cooling device to have a cooling air outlet, facilitate the removal of occasional broken glass, and minimize its noise.

Chemical tempering is the process of modifying the surface components of glass through chemical methods, adding surface layer stress to enhance the mechanical strength and thermal stability of the glass. Because it enhances glass through ion exchange, it is also known as ion exchange enhancement method. According to the type of ion exchange and the temperature of ion exchange, it can be divided into ion exchange methods below the change point temperature, abbreviated as low-temperature methods, and ion exchange methods above the change point temperature, abbreviated as high-temperature methods.

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