Pyrex

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Measuring cup

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Pyrex dish

Pyrex newspaper ad 1922

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Pyrex and PYREX

Hale telescope mirror during grinding 1945

Pyrex is a brand name for glassware, introduced by Corning Inc. in the early 20th century. It is made from a type of glass known as borosilicate glass, which is more resistant to thermal shock than any other common glass. This makes Pyrex ideal for use in a wide range of cooking and laboratory settings, where sudden changes in temperature are common.

History

The development of Pyrex began in the late 19th century when German chemist Otto Schott developed borosilicate glass, which was later used by Corning Inc. to create the Pyrex brand in 1915. The introduction of Pyrex marked a significant advancement in both the scientific and culinary fields, as it provided a durable and heat-resistant material that could be used in various applications, from baking dishes to laboratory equipment.

Composition

Pyrex glass is composed primarily of silicon dioxide (SiO2), boron trioxide (B2O3), sodium oxide (Na2O), and aluminum oxide (Al2O3). The addition of boron trioxide to the glass mixture is what gives Pyrex its low coefficient of thermal expansion, allowing it to withstand sudden temperature changes without shattering.

Uses

Pyrex has been widely used in both household and professional settings. In the kitchen, Pyrex is known for its cookware, including baking dishes, measuring cups, and mixing bowls. In the laboratory, Pyrex is used for beakers, test tubes, and other glassware, where its resistance to chemical corrosion and thermal shock is highly valued.

Safety and Care

While Pyrex glassware is designed to be durable, it is not indestructible. It can break under certain conditions, such as if it is dropped or exposed to an extreme temperature change. To maintain the longevity of Pyrex glassware, it is recommended to avoid placing hot glassware on wet or cold surfaces, not to use on stovetop, and to avoid using abrasive cleaners that can scratch the glass.

Evolution and Market

Over the years, the Pyrex brand has evolved, with changes in its composition and the introduction of new products. In some regions, the composition of Pyrex switched from borosilicate glass to soda-lime glass, which, while still durable, has different thermal resistance properties. Despite these changes, Pyrex continues to be a popular choice for consumers looking for reliable and durable glassware.

Collectibility

Vintage Pyrex, especially pieces with unique patterns or colors, has become highly collectible. Collectors often seek out rare or discontinued models, and some pieces can fetch high prices on the secondary market.

Conclusion

Pyrex glassware represents a significant innovation in the use of glass for cooking and scientific research. Its durability, resistance to thermal shock, and versatility have made it a staple in kitchens and laboratories around the world. As Pyrex continues to evolve, it remains a symbol of quality and reliability in glassware.

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