Dating pyrex mixing bowls

How do I identify my old Pyrex dishes?

Look for it above the trademark on bowls and dishes, and on the handles or rims of lids. Below is a listing of model numbers of the most often-seen pieces of vintage Pyrex kitchenware, which may be helpful for identification purposes.

What is the model number on a Pyrex bowl?

The backstamp on the earliest color ware round bowls included the word PYREX with the abbreviation T.M. REG. arched above it, and U.S. PAT. OFF. in a downward curve below forming a broken circle of sorts around the name. On some pieces, this was also enclosed in a ring. No model number or other information was included on the earliest pieces.

Can you sell Pyrex dishes?

Once youve determined your dish is both Pyrex and vintage, you might wonder if you should use it, put it aside for safekeeping, or attempt to sell it. If you want to buy or sell common patterns for individual pieces, you will likely pay or receive a reasonable price for a sturdy piece of kitchenware.

What is Pyrex ovenware made of?

Pyrex pieces are made of glass, although the type of glass has changed over the years. Pyrex ovenware was originally made of borosilicate glass due to its durability in heat. You can use identification markings, such as glass hue, date stamp, and more to tell if Pyrex is borosilicate; however, an expert can confirm.

How do I know if my Pyrex is antique?

Identify Pyrex Using Markings and Stamps The color and pattern isnt the only thing that will help you determine whether your Pyrex is antique or vintage. Use the glass markings, stamps, and logos on the pieces themselves to identify when the glass was produced.

Do people still use old Pyrex dishes?

Home cooks still use many vintage Pyrex bowls and casseroles dishes in their homes today. If youre looking for pieces to add to your kitchen collectionor put to use, check with older relatives, yard sales, and consignment shops to get the dish you need.

How can you tell the age of Pyrex opal glass kitchenware?

Estimating the age of Pyrex opal glass kitchenware can most often be done by observing a few basic characteristics. While colors and styles of decoration reflected consumer tastes at the time of production, the first thing to look at is the backstamp.

How do you identify Pyrex Shakers?

The matching lid is also marked “Pyrex” on one handle and “502,” on the other. Some clear glass pieces like these salt and pepper shakers (“Old Town Blue” pattern) are not marked. But glass carafes, with various designs like orange slices and stars are generally marked on the side (as shown).

What are Pyrex dishes made of?

Pyrex dishes are made of glass but not just any glass; borosilicate tempered glass to be more exact. One of the main properties of this special material is that its thermal shock resistant; this means you can prep, store, freeze and heat it up in all safety.

Is Pyrex glass oven-safe?

The thing to remember with the Pyrex glass oven-safe temperature is your dish is not resistant to thermal-shock, and it could shatter when going from one temperature extreme to another. So if you’ve bought new Pyrex glassware since 1998, it’s important to keep in mind that what you have is ordinary glassware and it needs to be handled with care.

Is Pyrex made of tempered glass?

Corning licensed the Pyrex brand to a company called World Kitchen—now known as Corelle Brands—in 1998, and by nearly all accounts, all Pyrex cookware sold in the United States after that year has been made of tempered soda-lime glass. This is where the controversy really heats up.

When did Pyrex stop making borosilicate glass cookware?

Although Pyrex manufacturers discontinued making the borosilicate glass in the 80s, it was common cookware for people around 1936 when it surfaced. During World War II, a soda-lime combination and other glass materials and combinations replaced borosilicate glass. The aluminosilicate was used in Flameware, which was also common.