Where is pyrex made in the usa

Pyrex began manufacturing patterned sets in the s. Use the glass markings, stamps, and logos on the pieces themselves to identify when the glass was produced. Glass kitchenware by Pyrex and Anchor Hocking are both safe and healthy choices.

Glass kitchenware can break when you drop it or handle it carelessly. Bakeware and storage containers by these brands will also crack if you expose them to drastic temperature changes. Is vintage Pyrex safe to use? No, it is not lead free. Pyrex still contains lead as per their statement below read between the lines. Pyrex has been around since It was developed by Corning, but was spun off, along with Corelleware, into a separate company in the early s. Save my name, email, and website in this browser for the next time I comment.

Skip to content Pyrex glassware is made in the USA as well. Where is Pyrex bakeware made? Where is Pyrex made? Is Pyrex glass made in USA? Is Pyrex still made in the USA? Where are Pyrex products made?

France Is Pyrex a French company? Where is Pyrex made now? Is Pyrex an American company? Is all Pyrex marked? Where does Pyrex come from? When asked about the science behind the glass, Dr. John C. Mauro, a professor of engineering and materials science at Penn State, said in an email that the coefficient of thermal expansion CTE is the main parameter used to measure thermal shock resistance.

A higher CTE number means the material is less resilient to thermal shock. But soda-lime glass has a CTE of 9 to 9. Mauro knows his glass, too. Before taking his faculty position at Penn State, he spent nearly two decades working at Corning, where he was one of the inventors of Gorilla Glass.

Mauro has also co-authored academic papers on the glass chemistry of Pyrex, and he is the editor of the Journal of the American Ceramics Society. Based on his extensive knowledge of the material, Mauro actually makes the science behind soda-lime glass and heat sound even more damning. He went on to note how soda-lime glass is tempered to improve its strength. However, that tempering process also makes the interior of glass more stressed.

So perhaps appropriately, the shift from borosilicate to soda-lime glass was a big deal to Pyrex enthusiasts. Many believe that the new tempered soda-lime glass is more prone to exploding during temperature changes, a belief that is supported by some basic science.

Meanwhile, Corning executives have since claimed it manufactured Pyrex out of both borosilicate and soda lime glass for years before selling the brand to World Kitchen.

One website even points out how different graphics and origins amount to safer Pyrex products. How much better older or European borosilicate Pyrex is than newer soda-lime glass Pyrex is up for debate. Exploding Pyrex incidents have happened, since the World Kitchen takeover, however. An oft-cited Consumer Affairs investigation from showed some pretty gnarly accounts of people doing simple things like putting a hot Pyrex pan in the oven only to have it explode in their hands, sending scalding shards of glass into their appendages.

There are photos of the injuries, too, so be careful clicking through to the report. Other companies also make cookware out of soda-lime glass , which would make those pans and cups more susceptible to shattering or cracking as well. Pyrex parent company Corelle Brand—again, this is the company formerly known as World Kitchen—said as much, when we asked about the exploding cookware controversy. Corelle Brands also confirmed that some of its cookware has been made of soda-lime glass since the s.

However, when Consumer Reports conducted an investigation into the issue of shattering cookware in , a Corning spokesperson told the magazine that several of its factories were producing Pyrex out of both borosilicate and soda-lime glass up until Corning licensed the brand to World Kitchen in In an email, the CPSC specified that it has received reports of shattering or exploding in the past seven years.

But still, exploding Pyrex incidents do happen, and they keep happening. Following more reports of exploding and shattering Pyrex containers, Popular Science replicated an explosion incident in , showing in a video how small amounts of stress can lead to dramatic breakage incidents due to thermal shock.