When buying kitchen glassware, it is important to distinguish the material

Nowadays, the types and applicability of glass products are becoming increasingly wide, and some glass products can be directly used as cooking utensils. However, due to some consumers' lack of understanding of the specific materials and scope of use of glass products, they have mistakenly purchased and misused them, resulting in some incidents of glass products bursting and injuring people.
At present, the glassware that consumers often come into contact with in home life mainly includes three categories: ordinary glass, tempered glass, and heat-resistant glass. Ordinary glass cannot be used in high-temperature heating environments such as ovens and microwaves; Tempered glass is an improved product made by tempering ordinary soda lime glass to enhance its resistance to mechanical impact, but its improvement in heat shock resistance is limited; Heat resistant glass mostly belongs to the borosilicate glass series, including varieties such as microcrystalline glass. Due to different chemical compositions, its structure is also different from ordinary glass or tempered glass. Borosilicate glass has a small coefficient of thermal expansion and has good resistance to high temperatures and rapid temperature changes. It is suitable for use as a food processing container in the kitchen and can be directly placed in microwave ovens and ovens.
Kitchen heat-resistant glass products mainly include heat-resistant tableware, heat-resistant fresh-keeping containers, and cooking utensils, which can be divided into two purposes: open flame and dark flame. Heat resistant glass with ultra-low expansion coefficient, such as microcrystalline glass, has a thermal shock strength of over 400 ℃ and is mainly used for direct open flame heating, cooking, and withstanding rapid heating and cooling; Dark fire glass products, with a thermal shock strength of over 120 ℃, are mainly used in non direct open flame heating and cooking occasions such as ovens and microwaves. They are also common heat-resistant glass products on the market, such as borosilicate glass. However, the labeling of glass products in the current market is not clear, and some operators intentionally confuse concepts, expanding the functionality of ordinary tempered glass or even ordinary glass. Therefore, the China Consumers Association reminds consumers to pay attention to:
1. Ordinary glass cannot be used for heating and cooking environments, such as in ovens and microwaves. Unhomogenized tempered glass may pose a risk of self explosion and injury if used in ovens and microwaves (currently, "homogenized" tempered glass is mainly used for industrial purposes, such as automotive glass, building doors and windows, furniture accessories, etc.).
Currently, there are no so-called heat-resistant tempered glass products or tempered heat-resistant glass products in the domestic market. Consumers should not be misled when making purchases.
3. Heat resistant glass products should have corresponding labels indicating the operating temperature, range of use, etc. At present, borosilicate glass is the majority of heat-resistant glass, while microcrystalline glass has high heat resistance.
4. Heat resistant glass products are obtained by annealing and cooling, with good thermal stability, high resistance to sudden temperature changes, and high production difficulty, as well as high manufacturing costs. If consumers find products with nominal heat-resistant glass but low prices when making purchases, they should consider their authenticity.