[China Glass Net] Glass tableware has been favored by more and more consumers because of its beautiful appearance, easy to clean, clean and clean. Many consumers often use glassware to hold food and use it for microwave oven or electric oven heating. . As everyone knows, some glassware, such as tempered glass tableware, poses a risk of bursting. If you don't understand the scale of heating, it is easy to use the risk. The reporter found that many consumers do not understand the choice of glass tableware needs, only by experience or business promotion, if you buy unsuitable glass tableware, it will bring trouble to the usual use. Tempered glass tableware bursting risk Nowadays, in many families, glass tableware has become a must-have commodity. In the usual days, many consumers are accustomed to using glass tableware to hold milk or meals, and then put them in a microwave oven to heat. So, is this safe? Is everything glass tableware heated in a microwave oven? The answer is no. In the past two years, there have been episodes about the heating and bursting of glassware in ovens or microwave ovens, which has caused many confusions for consumers. Which types of glass products are suitable for heating in microwave ovens or electric ovens? According to the reporter, there are two kinds of raw materials for glass tableware on the market today: one is tempered glass; the other is heat-resistant glass. In the meantime, tempered glass has high impact strength and a certain heat resistance; heat-resistant glass has good heat resistance and stability, and it is safer to place it in a microwave oven or an electric oven for heating. Although tempered glass can also be used for microwave heating, it has the potential for bursting. The “perpetrators†who reported the bursting of the media are basically tempered glass. According to experts, glass tableware may be mixed with nickel during processing. Nickel combines with the sulfur component contained in glass to become nickel sulfide. When heated in a microwave oven or an electric oven, the nickel sulphide contained in the glass tableware may swell and cause a burst. In addition, the impurities or bubbles mixed in the production process of the tempered glass, as well as the scratches caused during the processing, are one of the causes of the bursting during the heating process. Product information labeling disorder Regarding the risk of bursting of some glass tableware, is the merchant making a clear reminder? The reporter recently visited a number of large supermarkets and stores and found that the clarification of the glass crisper set is usually clearly marked with information on raw materials and applicable scale. For example, the reporter saw in a supermarket in Beijing that the set of glass storage boxes sold by the reporter indicated the information on the raw materials and precautions of the products, such as how to use them in the oven, and under what conditions the use would occur. Risk, etc. In addition, some commodities also indicate the raw material properties in a clear orientation, namely heat-resistant glass or tempered glass, and some products with boxes indicate the type of glass and the use of counseling on the package. In contrast, the specifications for glasses and dishes are very vague, and some products simply mark the word "glass" on the raw materials. They do not indicate what kind of glass, nor indicate whether it can be used in microwave ovens. Or electric oven heating. Some manufacturers only have a simple description of the product name and barcode, and other information is not known. The reporter saw in a glass outer packaging purchased from IKEA that it only marked the national standard for the precipitation of heavy metals and did not indicate the heat resistance specification. The reporter saw on the outer packaging of another Korean-made glass drinking cup that only the “Notes on Use†column is marked in Chinese. Other product information is marked in English and Korean. Usually, consumers can't learn more from it. information. According to the reporter's inquiry, most of the glass tableware sold on the Internet lacked information labels. Some products not only have no heat resistance specifications, but also have no raw material information, and their safety is worrying. Consumers buy more experience How do consumers buy a wide range of glass cutlery? A few days ago, the reporter conducted a random interview with this question, and the answers were all sorts of. Most consumers surveyed believe that today's glass tableware is usually clearly marked on the package whether it can be used in microwave ovens or electric ovens, and those that are not clearly marked cannot be heated by these devices. "I think the thicker the glass tableware should be, the stronger it should be. The heating in the microwave oven should not be very big. My family has always used this kind of glass bowl to heat up, and there is no bursting condition." Ms. Xiao, a Beijing consumer, informed the reporter. Regarding the question raised by the reporter, "Is it heard about heat-resistant glass?" she said: "The heat-resistant glass is tempered glass, which is more robust and heat-resistant." The reporter found that there are not many consumers who can't distinguish between tempered glass and heat-resistant glass. They usually prefer to buy tempered glass tableware when purchasing glass tableware, and usually based on their own experience, the greater the thickness. The less finished the glass, the better the high temperature resistance. Heat-resistant glass specifications need to be improved After the reporter's inquiry, it was found that the industry standard "steel tempered glassware for catering" (qb/t4064-2010) ruled that the heat-resistant rapid change function of tempered glassware for catering should reach 130 °C (interval temperature difference), the cracking rate should not More than 10%. That is to say, in the case of a sharp temperature change, there is a certain self-explosion rate in the finished tempered glass. In addition, the "Safety and Cleaning Request for Heat-Resistant Glassware" (gb17762-1999) rule limits the thermal shock resistance temperature of the heat-resistant glassware superiors (refers to the higher temperature difference that the high-temperature resistant glass can accept, within this parameter scale The glass can accept a large difference between the cold and hot temperature) 120 ° C, the qualified product is 110 ° C; the heat-resistant impact temperature of the blown heat-resistant glassware is 170 ° C, and the qualified product is 150 ° C. That is to say, within this scale, it is not allowed to present a burst. The reporter found that many production companies in China did not produce heat-resistant glass products in strict accordance with national regulations, and some companies used ordinary soda-lime glass to impersonate heat-resistant glass, posing a safety risk to consumers. 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