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Pyrex (trademarked as PYREX and pyrex) is a brand introduced by Corning Inc. in 1915, initially for a line of clear, low-thermal-expansion borosilicate glass used for laboratory glassware and kitchenware. It was later expanded in the 1930s to include kitchenware products made of soda–lime glass and other materials. [1]
Actually glass doesn't have any such thing as a melting point. Also borosilicate glass doesn't even have a higher softening temperature than conventional soda-lime glass. The main advantage is the low thermal expansion coefficient. It makes borosilicate glass less sensitive to thermal gradients and thermal shock. Regards, Herbert
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Also, if you examine the 10-K filings for WKI Holding Co., Inc., you will see that the 1999 filing says that Pyrex-Registered Trademark- products are made of borosilicate and tempered soda lime glass and are available in a number of colors, shapes and sizes, but by 2001 the word borosilicate was absent. So, the complete disappearance of ...
After Corning Glass Works introduced Pyrex in 1915, the name became synonymous with borosilicate glass in the English-speaking world (since the 1940s, a sizable portion of glass produced under the Pyrex brand has also been made of soda–lime glass). Borosilicate glass is the name of a glass family with various members tailored to completely ...
The results may taste a little different -- fish cooked in the oven is flaky, whereas fish cooked by lemon juice (a.k.a. ceviche) has a more raw-tasting consistency -- but the process is the same.
The manufacturing process for soda–lime glass consists in melting the raw materials, which are the silica, soda (Na 2 O), hydrated lime (Ca(OH) 2), dolomite (CaMg(CO 3) 2, which provides the magnesium oxide), and aluminium oxide; along with small quantities of fining agents (e.g., sodium sulfate (Na 2 SO 4), sodium chloride (NaCl), etc.) in a glass furnace at temperatures locally up to 1675 ...
It will say "brominated vegetable oil" or "brominated" and a specific type of oil, such as soybean. Some other things to look out for to avoid soda with BVO, according to Galligan: It's most ...