The high-temperature resistance property of glass tableware

The high-temperature resistance of glass tableware mainly depends on its material type. Different types of glass have significant differences in heat resistance.

Ordinary glass tableware

Ordinary glass, including soda-lime glass, etc., has relatively poor heat resistance. The softening point of this type of glass is approximately 600℃, and its temperature resistance generally does not exceed 70℃. It is prone to cracking when subjected to sudden temperature changes. For instance, directly placing ordinary glassware just taken out of the refrigerator into boiling water or suddenly moving it from a high-temperature environment to a low-temperature one may cause it to break. Therefore, ordinary glass tableware is not suitable for steaming, boiling or high-temperature heating.

High borosilicate glass tableware

High borosilicate glass is a special type of glass with excellent heat resistance. Its heat resistance temperature can reach over 400℃, and some high borosilicate glasses can even withstand temperatures around 800℃. This type of glass has a low coefficient of expansion and can withstand significant temperature differences, typically capable of withstanding an instantaneous temperature difference of around 150℃. High borosilicate glass tableware is not prone to cracking within a temperature range of 0 to 200℃, and there will be no problem if it is immediately filled with boiling water after being taken out of the freezer. Therefore, high borosilicate glass tableware is an ideal choice for high-temperature usage scenarios such as steaming, microwave heating, and oven cooking.

Tempered glass tableware

Tempered glass, through a special heat treatment process, enhances its impact resistance and heat resistance. Tempered glass tableware generally has a maximum working temperature of no more than 300℃, and its temperature difference resistance is also around 120℃. Although tempered glass has better heat resistance than ordinary glass, it may still break under extreme temperature differences. Therefore, when using tempered glass tableware, it is also necessary to be careful to avoid sudden temperature changes.

Other special glass tableware

In addition to high borosilicate glass and tempered glass, there are also some other special material glass tableware, such as microcrystalline glass, etc. Microcrystalline glass can withstand a temperature difference of up to 700℃ in an instant and has higher heat resistance and strength. However, this type of glassware is relatively rare in the market.