How do you tell the difference between old and new Pyrex?

Identify Pyrex Using Markings and Stamps Use the glass markings, stamps, and logos on the pieces themselves to identify when the glass was produced. The oldest Pyrex markings should be on the bottom of glass pieces and feature Pyrex in all capital letters inside a circle with CG for Corning Glassworks.

How can you tell if Pyrex is real?

If you look at the edge of a dish and it is made out of soda-lime glass it will be a blueish-green hue. If the glass is Borosilicate then you should not see any color.

What does the number on the bottom of a Pyrex bowl mean?

In many but not all cases, the trailing digit of the model number corresponds to the capacity in pints of the bowl or dish, e.g. #043 = 1½ quarts = 3 pints. Sets were typically assigned catalog numbers similar to the model number sequence of the pieces they contained, e.g. a #470 set contained 1 each 471, 472, and 473.

Is all Pyrex marked?

While colors and styles of decoration reflected consumer tastes at the time of production, the first thing to look at is the backstamp. On the bottom of most every genuine Pyrex opalware article is an embossed set of markings which contains a variety of information.

What is the most valuable vintage Pyrex?

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.

Is new Pyrex as good as old Pyrex?

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.

What is the most expensive Pyrex?

The most expensive Pyrex sold on eBay was on June 5, 2020 sold for $5,655.55 and it was an “Oh My Stars” Gold Constellation 474 MCM Starburst Grail with lid. This dish is so unique and would be perfect for a New Years Eve soiree.

Are old Pyrex bowls worth anything?

Youve definitely seen those old-fashioned Pyrex dishes somewhere. Before you decide to donate or toss any of that outdated glassware, think twice: Vintage Pyrex sets have sold for up to $1,800 online. Even single bowls have gone for a whopping $900 and this Foulard Pyrex mug on Etsy is up for sale at $800.

What is the most sought after Pyrex pattern?

Starburst is one of the most wanted rare Pyrex patterns, but the the Cinderella Serving Casserole almost never turns up for sale.

Can Pyrex explode?

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.

Is Pyrex worth collecting?

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.

Is it safe to use old Pyrex?

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 you roast in Pyrex?

Pyrex® Glassware can be used for cooking, baking, warming and reheating food in microwave ovens and preheated conventional or convection ovens. Pyrex Glassware is dishwasher safe and may be washed by hand using non-abrasive cleansers and plastic or nylon cleaning pads if scouring is necessary.