Are Older Pyrex Casseroles Stovetop-Safe? Unveiling the Truth Behind the White and Blue Flower Corning Ware

For many, the sight of a Pyrex casserole dish, especially the older models, brings back memories of family dinners and holiday feasts. These dishes, often adorned with a white and blue flower design, are a staple in many kitchens. But are these older Pyrex casseroles stovetop-safe? This question has been a topic of debate among cooking enthusiasts and collectors alike. Let’s delve into the history and manufacturing process of these dishes to unveil the truth.

The History of Pyrex

Pyrex, a brand introduced by Corning Inc. in 1915, is known for its glassware products, including casserole dishes, bowls, and measuring cups. The original Pyrex was made from borosilicate glass, which is resistant to thermal shock. This means it can withstand sudden temperature changes without cracking or breaking, making it ideal for oven use.

Changes in Pyrex Manufacturing

In the 1980s, Corning Inc. sold the Pyrex brand to World Kitchen, LLC. The new company changed the manufacturing process, replacing borosilicate glass with soda-lime glass. While soda-lime glass is more resistant to breaking when dropped, it is less resistant to thermal shock, making it less suitable for stovetop use.

Are Older Pyrex Casseroles Stovetop-Safe?

Given the change in manufacturing, it’s clear that not all Pyrex dishes are created equal. Older Pyrex dishes made from borosilicate glass are indeed stovetop-safe. They can withstand high temperatures and sudden temperature changes without risk of damage. However, Pyrex dishes made after the 1980s from soda-lime glass should not be used on the stovetop, as they can crack or shatter.

Identifying Old vs. New Pyrex

So how can you tell if your Pyrex dish is old or new? Older Pyrex dishes often have a bluish tint, while newer ones are clear. Additionally, older dishes may have the word “Pyrex” in all capital letters, while newer dishes use a mix of upper and lower case letters. However, these are not foolproof methods, and when in doubt, it’s best to err on the side of caution and avoid using your Pyrex dish on the stovetop.

Conclusion

In conclusion, while older Pyrex casseroles made from borosilicate glass are stovetop-safe, newer models made from soda-lime glass are not. It’s important to know the difference to ensure the safety and longevity of your Pyrex dishes. Remember, when it comes to cooking, safety should always be your top priority.