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The Pyrex instantly exploded, sending shards of glass flying. The same thing can happen, he said, when a cool glass dish goes into a preheated oven.
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Though this is an extreme condition and not advised, Meshulam said it can and does happen. Nearly an hour later, Meshulam took out the Pyrex dish and placed it on a wet stone slab. "It can absorb heat and really hold it just like a liquid can." "It has mass," Meshulam said of the sand. Using sand, which is common in this type of demonstration, glass expert Mark Meshulam filled both baking dishes and put them in a standard oven at 450 degrees. One was Pyrex brand, made of soda lime glass, and one was a different brand, made of borosilicate. So why is it happening? In a demonstration, NBC Responds brought two brand-new baking dishes. NBC 5 Responds in Chicago found 850 reports of shattering or exploding glass cookware, including Pyrex and other brands, submitted to the Consumer Product Safety Commission over the past seven years.Ĭorelle Brands said that while "any glass bakeware has a risk of breakage, Pyrex glassware has an exceptional safety record." "It was like a bomb had gone off."Ĭorelle Brands called those type of cases unusual, saying it "produces glassware of the highest quality that is safe to use in conventional, convection and microwave ovens." "Fifteen minutes in, is it was just like, 'Kaboom!'" one consumer told NBC Responds about her experience with a Pyrex dish. Tight Deadline to Apply for Miami-Dade Schools Superintendent Ends