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1. What Did Pyrex Misrepresent? Pyrex sold glass measuring cups that the company claimed were made in the U.S., but were in fact made in China.
Older clear-glass Pyrex manufactured by Corning, Arc International's Pyrex products, and Pyrex laboratory glassware are made of borosilicate glass. According to the National Institute of Standards and Technology , borosilicate Pyrex is composed of (as percentage of weight): 4.0% boron , 54.0% oxygen , 2.8% sodium , 1.1% aluminum , 37.7% silicon ...
The lids of CorningWare are typically made of Pyrex. Though some early lids were made of Pyroceram, most subsequent covers have been made of borosilicate or tempered soda-lime glass. Unlike the cookware, these lids have a lower tolerance for thermal shock and cannot be used under direct heat.
The B 2 O 3 content for borosilicate glass is typically 12–13% and the SiO 2 content over 80%. High chemical durability and low thermal expansion (3.3 × 10 −6 K −1) – the lowest of all commercial glasses for large-scale technical applications – make this a versatile glass material. High-grade borosilicate flat glasses are used in a ...
The gun ports were closed by means of temporary lids, a temporary replacement of the collapsed sterncastle was constructed, and many of the holes from the iron bolts that had rusted away were plugged. The final lift began on 8 April 1961, and on the morning of 24 April, Vasa was ready to return to the world for the first time in 333 years ...
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