Is there a difference between Pyrex and Pyrex?

Products with the name 'pyrex' (all lowercase) are made by a company called World Kitchen and are made out of clear tempered high-thermal-expansion soda-lime glass, which has a lower thermal shock resistance, making them susceptible to explosions in the microwave or oven.

Is Pyrex different from Pyrex?

Pyrex (trademarked as PYREX and pyrex) is a brand introduced by Corning Inc. in 1915 for a line of clear, low-thermal-expansion borosilicate glass used for laboratory glassware and kitchenware. It was later expanded to include ware products made of soda-lime glass and other materials.

Is all Pyrex the same?

Corning has licensed out the use of their PYREX® (upper case lettering) and pyrex® (lower case lettering) logos to 2 different companies. They are not the same products! FRENCH PYREX IS MUCH SAFER!!!!

Why did they change Pyrex?

However, in the early 90s, Corning, the company that invented Pyrex, started using soda lime silicate glass instead of borosilicate (another manufacturer now owns the line). The switch was, its makers say, to boost the glassware's ability to withstand being dropped.

How can you tell if glass is Pyrex?

The difference between Pyrex and glass is that Pyrex is tempered glass and used for cook wares whereas glass is mostly used for architecture and furniture.

The Story of Borosilicate Glass: Why Pyrex was Special

Are vintage Pyrex bowls safe to use?

Is vintage Pyrex safe to use? The short answer to this is "I wouldn't use it." This was a common response to the test posted on Facebook. People insisted that since food doesn't come in contact with the outside of the bowls, these tests do nothing more than drum up fear.

What do the numbers on the bottom of Pyrex mean?

Pyrex dishes also hide a little secret code: Many contain a three- or four-digit number that corresponds to a specific dish. A series of Mixing Bowls will feature 401 (1.5 pint), 402 (1.5 quart), 403 (2.5 quart), 404 (4 quart). The iconic two-quart green-and-white casserole dish is a 232.

Is Pyrex still made?

The Pyrex brand continues to be produced by World Kitchen today. Pyrex has become an icon in most American homes, in the forms of clear borosilicate bakeware, sets of patterned opal ware, and stovetop FLAMEWARE.

Why does Pyrex glass not break?

This is partly because the brand is so popular in the US, but also partly because its bakeware used to be less prone to breaking from thermal shock. Pyrex pieces used to be made of borosilicate glass, which is more resistant to breakage when subjected to extreme shifts in temperature.

Is Corning Ware and Pyrex the same?

Essentially, the main difference between Corningware and Pyrex is that Corningware tends to be smaller, and more aesthetically pleasing. No one wants to see grandma's gorgeously glazed holiday ham in a Pyrex dish; presentation is everything!

Can Pyrex go from refrigerator to oven?

You shouldn't let your Pyrex go from one extreme temperature to another, whether you're moving a piping-hot casserole from the oven to the fridge, or a make-ahead cobbler from the fridge to the oven. Instead, let items come to room temperature before adding them to a cold or hot place.

Can I put Pyrex glass in the microwave?

As a general rule, you shouldn't microwave cold pyrex. This is because, like any glassware, Pyrex glassware is susceptible to thermal shock. This means that sudden temperature changes can cause the glass dishes and containers to crack or shatter.

Can Pyrex glass go in oven?

Pyrex® glassware is designed to be as versatile as it is long lasting. You can use it to prepare, store, cook, bake, warm or reheat food—in pre-heated conventional and convection ovens, or in microwaves. And cleanup is easy – just place your Pyrex® glassware in the dishwasher.

Which Pyrex is oven safe?

The short answer is yes; Pyrex glassware is completely safe to put in a preheated oven. But, Pyrex plasticware, including the plastic lids that come with the glassware, are not oven-safe. The plastic lids are designed for storage only and will melt if you put them in the oven.

What is Cinderella Pyrex?

Cinderella Story. In 1957, Corning's Pyrex kitchenware designers devised a few new shape models to freshen things up a bit. These were, primarily, a set of four nesting mixing bowls, with new round casseroles in a handful of sizes following in 1958.

Why is vintage Pyrex so expensive?

The series caused interest in vintage Pyrex to spike, with long-term collectors that were used to easily locating the glassware at yard sales and thrift stores finding the items harder to come by — and more expensive when they were available.

What is special about Pyrex glass?

Chemically, Pyrex contains borosilicate and expands only about one-third as much as common glass (silicate) when heated. As a result, it is less apt to break when subjected to rapid temperature changes. It is resistant to many chemicals and is an electrical insulator.

Is Pyrex made in China?

Pyrex glass bakeware has been proudly made in Charleroi, PA for nearly 60 years, first by Corning Inc. and now by Corelle Brands. Heat-strengthened soda lime glass provides the same high-quality performance as borosilicate glass.

How do you clean old Pyrex bowls?

Dish washing detergent will literally strip the sheen off your Pyrex and eventually wear away some of the color and the pattern. Instead, you must wash it by hand, in hot soapy water, using gentle dish washing soap like Ajax.

How do I know what size my Pyrex dish is?

All Pyrex is stamped on the bottom of the dish with this kind of information. It will say Pyrex and have the number and size stamped with it as well. Mixing Bowls, originally uploaded by jenib320.

When did Pyrex stop using lead paint?

The short answer is most likely. The thing is this isn't limited to Pyrex. Lead standards for dishes start until the 1970s. Because of this, it's really hard to know if our vintage dishes contain lead.

Is Pyrex glass toxic?

Best in Glass: Pyrex Basic Dishes

Glass is a naturally non-toxic cookware material and the baking dishes are also non-porous, so odors and stains won't seep into them as you cook your food. Pyrex cookware is dishwasher-safe and safe to use in the microwave, oven, fridge, and freezer.

Is scratched Pyrex safe to use?

1 Answer. Show activity on this post. The reason not to use scratched glass bakeware is because the internal stresses encountered during heating can (rarely) cause the bakeware to violently fracture along the scratches.