Turns out, 'PYREX' and 'pyrex' refer to 2 different things

[Orange]

 

When it comes to kitchen essentials, Pyrex has long been a trusted name. But not all Pyrex dishes are created equal, and the difference between "PYREX" and "pyrex" can mean more than just a change in font. It boils down to the materials used—and more importantly, the safety of your bakeware under extreme temperatures.

 

Originally introduced by Corning Inc. in 1915, PYREX, with its distinct uppercase branding, is made from borosilicate glass. Known for its impressive resistance to thermal shock, borosilicate glass can handle quick transitions from hot to cold without breaking. Whether you’re moving dishes from the fridge straight into the oven, PYREX is designed to withstand these temperature swings.

 

 

However, not all glassware bearing the Pyrex name has the same durability. In the US, South America, and parts of Asia, the lowercase “pyrex” signifies a different type of glass entirely. Made from tempered soda-lime glass, this version is less resistant to sudden temperature changes, which can sometimes lead to shattering when exposed to extreme heat. While tempered soda-lime glass is more durable than regular glass, it’s simply not as resilient as the borosilicate variety.

 

This distinction often confuses consumers, especially since PYREX and pyrex are sold side by side, often sporting similar red logos and packaging. However, the shift from borosilicate to soda-lime glass in the US market was driven by cost and environmental concerns, as boron, a key component of borosilicate, is both expensive and tricky to dispose of.

 

To avoid kitchen mishaps, it’s essential to check the labeling and be aware of what your glassware is made from. While both types have their uses, knowing whether your dish is borosilicate or soda-lime glass could save you from a shattered mess.

 

• https://www.apartmenttherapy.com/pyrex-brand-differences-37426401 
• https://www.allrecipes.com/article/what-is-the-difference-between-two-pyrex-types/ 
• https://www.simplyrecipes.com/pyrex-vs-pyrex-which-is-safe-7488788 
• https://www.hunker.com/13778152/difference-between-types-of-pyrex/ 

 

 

 

Images: ColleenMichaels and David Tonelson | Dreamstime.com