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Recently, the Consumer Association issued a consumer warning, called on consumers to guard against the kitchen killer, "tempered glass meal with blew risk, while the heat-resistant glass tableware high safety factor, consumers use glassware to identify the material." In the CASE pointed out,
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Glassware (tableware) production enterprises are obliged to make clear the product material, the use of the environment and safety precautions, and ovens, microwave ovens and other appliances corresponding to the production and operation of enterprises is also necessary in the instructions marked with the relevant heating container selection Specific functional requirements, the use of such content.
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on site 

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Glassware in the sale of more than not labeled
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At present, home life, consumers often come into contact with the glassware are ordinary glass, glass and heat-resistant glass three categories.
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Reminder
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Low-cost "heat-resistant glass" or hidden cat tired
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"In some markets, some businesses with ordinary glass containers posing tempered glass, and some with tempered glass posing as heat-resistant glass products, consumers simply can not tell." China Building Materials Testing and Certification Center, Professor Shi Xinyong told reporters that the actual , The toughened glass than ordinary glass container manufacturing costs to be higher than 10%; and heat-resistant glass containers the highest manufacturing cost than ordinary glass container manufacturing costs to about 30% higher.
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Experts point out that the current heat-resistant glass to borosilicate glass, which is more to the best heat-resistant glass-ceramic.

"Heat-resistant glass has good resistance to high temperature and temperature changes in the characteristics of rapid quenching, suitable for use as a kitchen food processing containers, can be directly into the microwave oven and oven use." Shi Xinyong said.
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However, the safety of heat-resistant glass is also relative.
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"If the heat-resistant glass and tempered glass at the same time broken, then the risk of heat-resistant glass will be higher.Therefore, the key is to use the right containers for the occasion." Related professionals pointed out that although the heat-resistant glass can withstand Higher temperatures, but once broken, it will still form sharp corners, careless contact is likely to cause harm.
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At this time, you need to play a role in product identification.
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China Consumer Association to remind consumers, the current domestic market is not the so-called heat-resistant glass products or heat-resistant glass products, in the purchase do not be misled.
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In addition, the heat-resistant glass products should be affixed with the corresponding mark, indicating the use of temperature, range of use; glass cookware (tableware) manufacturers are obliged to product materials, use of environmental and safety precautions made express. Ovens, microwave ovens and other household electrical appliance manufacturers also need to indicate in the instruction manual supporting the heating container selection of the specific functional requirements, the use of such content. 

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"Consumers in the purchase if you find the nominal heat-resistant glass but the price is very low, to consider its authenticity." Consumers Association said.
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Yesterday afternoon, the reporter visited a number of supermarkets in Hangzhou tableware counter, found that each supermarket has in the sale of glassware, from the price can be simply distinguish between ordinary glass and some tempered glass products, and some high-priced heat-resistant glass products. Reporters randomly selected several glassware, are not found in the above-related use of identity.
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"This ordinary glass can not be used for ovens, microwave heating of high-temperature, like this a glass bowl is tempered glass, the quality is very strong, very safe to use." Jianguo Road in a large supermarket, the promoters say .
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Reporters on-site investigation, found that nearly 90% of consumers do not understand the difference between tempered glass and heat-resistant glass, but do not know can not use boiling glass of tempered glass of tea. "The family often use glass bowls, these tempered glass containers for cooking is convenient, but also into the microwave heating." A surname, said Zhao's aunt.
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In fact, although many consumers know that ordinary glass can not be used for heating cooking, but there are still many people, like Zhao aunt, do not know the homogeneous treatment of the tempered glass in the oven, microwave oven use, but also has the risk of suicide wounding .
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Related to the industry explained that the reason is easy to blew glass, because in the manufacturing process mixed with the naked eye can not be found in the nickel sulfide components, the nickel sulfide will lead to tempered glass in the ambient temperature changes occur with the glass Do not match the larger expansion, resulting in the phenomenon of self-exploding glass flies.
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"Blew is tempered glass is an inherent characteristic, or defective." Yesterday, the ancient Pier Road, a special sale of all kinds of glass shops, store owner Zhang Dehai said, no matter how thick the glass blew the existence of the phenomenon, which is normal . "The state has the relevant standards, provides no more than three thousandths of the blew rate.