We now see that the more brands there are in the market, the more materials there are. Now, with the appearance of tableware of various materials, consumers are a little overwhelmed, thus constantly questioning whether tableware of various materials are good tableware and whether we can use them for a long time. Today, Xiaobian will tell you about the benefits of tempered glass tableware? See what kind of crisis is hidden behind it? Interested friends, come and have a look!

Benefits of toughened glass tableware

1. It is made of quartzite raw materials, which are melted at 1,811℃, mechanically pressed and toughened, and bone China powder is added with high technology.

2. It is transparent, delicate, Bai Jie and gorgeous with high-grade bone China.

3. It has the brightness of tempered glass, hardness, corrosion resistance, heat resistance, impact resistance and easy cleaning.

4. The product is non-toxic and tasteless, and does not contain lead and mercury substances harmful to human body in ceramics. It is the most environmentally friendly tableware at present.

5, the product process is complex. They are all made of three layers of glass by hinge lamination process and high temperature pressing at 1811℃. The middle layer is made of bone China and the upper and lower layers are made of toughened glass.

6. The unique sandwich structure of tempered glass makes the product thinner and lighter, more resistant to chipping, cracking or cracking, and will not leave indelible stains or spots.

the crisis behind the brightness of toughened glass tableware

1. Market research:

Product identification is often missing

The reporter visited the market and found that many large supermarkets sell a wide range of glass tableware, but many products are not clearly marked with necessary information such as materials, whether they can be heated and precautions for use.

In XX supermarket, the reporter saw that the glass crisper is usually equipped with detailed instructions, which indicate the product material, precautions, etc., such as how to use it in the oven and under what circumstances it will be dangerous. Some products are also marked in a prominent position as heat-resistant glass or tempered glass. And some products with packaging boxes also indicate the types of glass and instructions for use on the packaging.

At the same time, however, a large number of glass cups and dishes are mostly marked with vague labels. Some products simply write the word "glass" on the material, and there is no other information. What's more, there is only a simple product name and barcode, and other information is unknown.

second, the consumer said,

how to use the glass by experience

at what temperature is it difficult to crack when used? What kind of glassware can go into the microwave oven? How do consumers choose and use glass tableware when they can't know these important information about products? The reporter conducted random interviews with some consumers.

Ms. Zhang, a citizen, said that she would usually choose a thicker texture because it looks stronger and may be more resistant to high temperature. She also believes that glass tableware should be heated in the microwave oven, which she has been doing without any problems.

"Tempered glass is definitely stronger than ordinary glass." Ms. Chen, a citizen, has different views. However, when the reporter asked what kind of toughened glass tableware was, she said that sometimes it would be written on the product trademark, and when it was not marked, she would choose a thicker one.

Third, experts say:

Heat-resistant glass logo is still being promoted

Zhao Wanbang, deputy secretary-general and senior engineer of China Daily Glass Association, said that there are some misunderstandings when people use glass tableware, and the most common one is to heat food in the microwave oven regardless of materials. He introduced that there are many kinds of glass used to make tableware. Only heat-resistant glass is suitable for use in microwave ovens and ovens, and it is not "thick and tempered and can be heated" as the public thinks. However, there is a certain safety risk in using other kinds of glass tableware for heating by mistake.

At present, the problem is that ordinary consumers can't distinguish the specific materials of glass tableware from the appearance, and some products in the market do have unclear labels. In order to solve this problem, China Daily Glass Association is promoting the certification label of heat-resistant glass. The association has formulated a strict assessment system, and authorized enterprises with strict production process control, excellent quality and qualified service to affix certification marks on heat-resistant glass products. By then, citizens can easily identify heat-resistant glass products with this logo. In addition, Zhao Wanbang introduced that the relevant industry standards stipulate the logo map of tempered utensils for catering on commodity packaging, and citizens can pay attention to distinguish the types of safe use when purchasing.

because the main chemical components of glass products are inorganic compounds such as silica, sodium oxide and calcium oxide, the state has strict regulations on the limit value of precipitates from tableware, and the glass tableware and drinking utensils produced by regular enterprises are harmless to human body, so consumers basically don't have to worry that glass tableware will cause harm to food safety. Daily contact with glass tableware can be divided into soda-lime glass, that is, ordinary glass, borosilicate glass, lead crystal glass and glass-ceramics. Tempered glass is further processed on the basis of ordinary glass. These materials have their own characteristics and should be treated differently when used.

1, soda-lime glass

Ordinary glasses and bowls at home are made of this material, and its sudden temperature difference is greater than 51℃, so it should be used reasonably in this range. For example, if you take out a glass in a cold storage room and immediately inject boiling water, there is a possibility that it will break. In addition, soda-lime glass products are not recommended to be heated in the microwave oven, otherwise there will be certain safety risks.

2. borosilicate glass

is also heat-resistant glass. Common glass crispers are made of it, which is characterized by good chemical stability, high strength and sudden temperature difference greater than about 111℃. It has good heat resistance and can be safely used in microwave ovens and ovens. However, there are still some necessary precautions when using it on different occasions. First of all, if you use this kind of fresh-keeping box to freeze liquid, be careful not to fill it too full, and the lid should not be tightly covered, otherwise the liquid will expand during freezing and put pressure on the lid, which may affect its service life. Secondly, the lunch box taken out of the freezer should not be heated by microwave oven immediately. Thirdly, don't cover the lid tightly when heating at ordinary times. The gas generated during heating will squeeze the lid and cause damage to the product, and heating for a long time will make it difficult to open the lid.

3. Glass-ceramics

is also called super heat-resistant glass, and the very popular glass cookware on the market is made of this material. It is characterized by excellent heat resistance, with a sudden temperature difference of 411℃. However, at present, domestic manufacturers have not started to produce glass-ceramic cookware, so there is no relevant standard for it. Consumers are advised to check the quality inspection report of the product in detail when purchasing to fully understand the product performance.

4. Lead crystal glass

, commonly known as crystal glass, is generally used to make goblets. It is characterized by good refraction, crisp sound and good feel. However, it has been suggested that holding acidic drinks in this cup will lead to lead precipitation and endanger health. Zhao Wanbang said that this kind of worry is unnecessary. First of all, the state has strict regulations on the amount of lead precipitation. The strict experimental conditions set in the standard cannot be copied in daily life. In order not to doubt food safety, experts still suggest not to store acidic liquids in lead crystal glasses for a long time.

5. Tempered glass

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

precautions

when we use tempered glass in our daily life, we need to pay attention to some small details in use and cleaning!

1. Glass is a brittle material, but its defect is poor impact resistance. Even tempered glass tableware should not avoid collision. In addition, when cleaning, do not use steel balls to brush any glass products. "When it rubs against the glass surface, it will form invisible scratches, which will affect the strength of glass products to a certain extent and shorten the service life."

2. When put into the freezer of the refrigerator, the holding volume should not exceed two thirds of the container; When glassware is closed or semi-closed, avoid holding liquids such as juice, broth, milk, porridge soup, etc. Because the food volume expands after freezing, it will also lead to product damage.

3. When heating in the microwave oven, be sure to open the lid. Although the box cover is made of PP (cold/heat resistant temperature B21℃-121℃) and the sealing strip is made of silicone pad (cold/heat resistant temperature B41℃-211℃), the box cover cannot be opened or deformed due to thermal expansion and contraction, which affects the product sealing.

4. Use the steamer carefully, such as steaming fish and egg soup. The pressure of the steamer will easily react with the pressure of tempered glass, which will cause slight cracks in the glassware.