PYREX vs. pyrex: Understanding the Material and Manufacturing Differences
By
lisper
An everything bagel for the brain. Substantive, layered, well-seasoned.
Summary
The article explains the key differences between PYREX (uppercase) and pyrex (lowercase) products. PYREX refers to Corning's original borosilicate glass laboratory equipment that withstands extreme temperature changes and chemical reactions, while pyrex refers to consumer cookware made with soda-lime glass after Corning sold the consumer products division. The distinction lies in the glass composition and intended use - borosilicate for labs and soda-lime for kitchenware.
Key quotes
· 3 pulledCorning used borosilicate to produce all Pyrex products. However, the company that purchased the cookware products switched to soda-lime glass, adopting the name pyrex (spelled with all lowercase letters).
Corning continued to make its lab tools with borosilicate, dubbing these products to be PYREX (spelled with all uppercase letters).
Borosilicate glassware can sustain the large, sudden temperature changes that frequently occur in labs without shattering. These products are also less likely to react to chemicals.
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