Dating pyrex glass Explore Pyrex Cookware, Kitchenware, and more!

Dating pyrex glass, about the pattern reference

In many cases, unknowns were named by other people.

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It was not until a few years later that the largest bowl was offered in open stock and also in red. I belive that Corning still makes the glass availible for this purpose.

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June 25, at 8: The most common Pyrex insulator found in clear glass would probably be the CD style. The design of series refrigerator storage dishes' lids can help determine their age. Because of time and energy constraints, I may not be able to answer all emails personally, but you can contact me directly at: Shades of color can also be a clue to age.

Glass tubing, test tubes, lab can you hook up a gfci outlet without a ground, funnels and other miscellaneous laboratory equipment and containers were made in quantity.

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This website is not intended as an appraisal service, but as a resource for background info on glass companies and the marks they used, so I usually delete "What is this bottle worth? These appear to be related to either molds or production runs.

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I myself, use a pyrex flameware percolator. As an amateur astronomer, I would mention that tons of Pyrex glass has been made into reflecting telescopes mirrors over the years.

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Side by side comparisons, however, are often necessary to distinguish among them. Pyrex Love is a resource for collectors of vintage pyrex and other glassware. One of the very first items that piqued my interest in collecting and selling vintage items was a Pyrex bowl. Since pattern collections and promotional pieces were available for relatively finite periods, knowing their years of introduction and discontinuance can also help narrow down dating somewhat.

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August 14, at 6: From Consumer Reports, quote: Being embossed rather than incised, and the material being glass, it is obviously molded in rather than stamped. November 12, at 7: The glass would have to be tempered at the factory and there is nothing in the environment that could cause this to happen on a piece of glassware that was tempered adequately. What would have caused this? While colors and styles of decoration reflected consumer tastes at the time of production, the dating pyrex glass thing to look at is the backstamp.

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Please bookmark this site and I hope you will return often. If this is your first time here, please read the sidebar at right for tips on notation we've used throughout these datings pyrex glass.

AGEE PYREXWARE — circa 1930s, not before 1931

Mauzy This is an essential Pyrex book for collectors featuring over beautiful color photographs of our favorite glassware! Pyrex ovenware has been a staple in American households for many decades. Such things have happened over the years occasionally, but the frequency of the occurrences have greatly increased after the manufacturers changed their formula to a cheaper grade of glass.

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The glass was not tempered correctly. Sorry I have no definitive answer.

AGEE PYREX — from 1930s until about 1972

PYREX — group of 3 heat-resistant bowls. Pyrex Passion by Michael D.

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On the bottom of most every genuine Pyrex opalware article is an embossed set of markings which contains a variety of information.

The configuration of the backstamp would undergo a few revisions after the introduction of opal glass kitchenware in They do not appear to be indicative of dating.