The new glass was soda-lime glass, which is strong but hasnt stopped peoples Pyrex glass products from breaking from time to time. That old casserole dish is sufficiently heat-resistant (and thermal-shock proof) and will withstand even the most extreme temperature changes since its of the original glass.

Why did they change Pyrex?

But at some point in the past several decades (a representative we contacted at Corelle Brands, the manufacturer, wouldnt reveal when exactly, but they confirmed that the company has been producing at least some tempered glass since the 1950s), Pyrex switched to tempered glass, most likely because boron, which is used

Is new Pyrex safe?

The short answer to this question is “yes!” Pyrex bakeware (both old and new) is safe to use in your oven – and microwave – as long as you avoid dramatic, sudden temperature changes.

Is Pyrex worth anything?

Patterned Pyrex—such as the 1956 Pink Daisy or the 1983 Colonial Mist—also tend to be valuable as a collectors item. Some patterned collections, like the 1959 Lucky in Love heart and four-leaf clover design, have been valued as high as $4,000 for one bowl. But colored Pyrex must look shiny and new.

Does clear Pyrex contain lead?

No, it is not lead free. Pyrex still contains lead as per their statement below (read between the lines). Whether FDA or California has approved some measure of lead, is not as relevant as how ANY exposure to lead in your familys daily lives will affect your health over the long term.

Is Vintage clear Pyrex safe?

Is vintage Pyrex safe to use? The short answer to this is I wouldnt use it. This was a common response to the test posted on Facebook. People insisted that since food doesnt come in contact with the outside of the bowls, these tests do nothing more than drum up fear.

Can a Pyrex dish go in the freezer?

To prepare for a busy weeks meals or freeze leftovers, Pyrex® has designed COOK&FREEZE, a range of heatresistant borosilicate glass ovenware, that allows you to move from freezer to oven and oven to freezer safely. Without handle and with straight lines, its design allows optimal storage in the freezer.

Can you bake a frozen Pyrex dish?

When using Pyrex or any glass bakeware or cookware, you should avoid extreme temperature changes—very cold dishes shouldnt be placed in a hot oven, and vice versa. For example, if you froze a piecrust in a glass pie plate, then wanted to bake it, you shouldnt put the pie plate directly into a preheated oven.

Why did my Pyrex baking dish exploded?

When a Pyrex bowl is heated or cooled rapidly, different parts of the bowl expand or contract by different amounts, causing stress. If the stress is too extreme, the bowls structure will fail, causing a spectacular shattering effect.

Does baking in Pyrex take longer?

Youre right: Pyrex, and other tempered glass, takes longer to heat up and longer to cool down than metal. Because glass is so efficient, you often need to make adjustments in either baking time or temperature, or both, when baking. Otherwise, food tends to get overbaked or over-browned.