What are the types and differences of food grade glass?

It is mainly divided into three kinds: they are sodium calcium glass products, high borosilicate glass, tempered glass products

The difference is as follows:

1, sodium calcium glass

Sodium-calcium glass has poor thermal shock resistance and is likely to break when boiling water is poured into it.

2, high borosilicate glass

High borosilicate glass has stable chemical properties, high temperature resistance, high strength, high hardness, high transmittance characteristics. High borosilicate glass price is relatively high.

3, tempered glass

The strength is several times higher than ordinary glass, the bending strength is 3-5 times that of ordinary glass, and the impact strength is 5-10 times that of ordinary glass, which improves the strength while also improving the safety.

Food grade glass materials have their own characteristics and should be treated differently when used.

1, sodium calcium glass

Ordinary glasses and bowls at home are made of this material, and its sudden temperature difference is greater than 50 ° C, which should be used reasonably in this range. For example, if you take out a glass in the cold room and immediately inject boiling water, there is the possibility of rupture. In addition, sodium-calcium glass products are not recommended to be heated in the microwave oven, otherwise there is a certain safety risk.

2, borosilicate glass

That is, heat-resistant glass, the common glass crisper is made of it, which is characterized by good chemical stability, high strength, and a sudden temperature difference of more than 110 ° C. It has good heat resistance and can be safely used in microwave ovens and ovens. However, when used on different occasions, there are still some necessary precautions. First of all, if you use this type of fresh-keeping box to freeze liquid, be careful not to overfill, the lid should not be tightly covered, otherwise the liquid expands during freezing, putting pressure on the lid, which may affect its service life. Secondly, the lunch box taken out of the freezer should not be heated with a strong microwave oven immediately. Thirdly, do not cover the box cover tightly when heating, the gas generated during heating will cause damage to the product, and long-term heating will also make the box cover difficult to open.

3. Glass-ceramics

Also known as super heat-resistant glass, the very popular glass POTS on the market are made of this material. It is characterized by particularly good heat resistance and a rapid temperature difference of 400 ° C. However, at present, domestic manufacturers have not begun to produce glass-ceramic POTS, so there is no relevant standards for it, it is recommended that consumers buy, look at the quality inspection report of the product in detail, and fully understand the product performance.

4, lead crystal glass

Commonly known as crystal glass, it is generally used to make tall glasses. It is characterized by good refraction, crisp sound and good feel. However, some people have suggested that the use of such cups to hold acidic drinks will lead to lead precipitation, which is harmful to health. Some in the industry say such concerns are unnecessary. First of all, the state has strict regulations on the amount of lead precipitation. The strict experimental conditions set in the standard simply cannot be replicated in daily life. In order not to doubt food safety, experts still recommend not to use lead crystal glass for long-term storage of acidic liquids.

5, tempered glass

Ordinary glass is made by physical tempering. Compared with ordinary glass, the impact resistance is greatly enhanced, and there is no sharp corner debris after breaking, and its heat resistance is also greatly enhanced. However, it is not recommended to heat the tempered glass tableware in the microwave oven, otherwise it may damage the product.

The above content comes from Xuzhou Bolite Import and Export Trading Co.,Ltd.

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