Vintage Pyrex Price Guide 2023: The Complete Guide To Collecting Vintage Pyrex

Pyrex is a trusted brand name of ovenware that has been in business for over a century, started as a part of Corning Glass Works. Vintage pieces are still used in today's kitchens. The easiest way to identify whether your piece is antique or vintage is to examine it.How to Tell If Pyrex Is Vintage Using Patterns and ColorsPyrex glassware made by Corning Glass Works was originally clear. In the mid-1940s, however, colored and patterned bowls and casserole dishes began appearing and are what many collectors seek today. Pastel shades of blue, green, pink, and more became common, although bright primary colors also had their time along with more muted earth tones. The Corning Museum of Glass's Pyrex Pattern Library and Pyrex Pattern Reference from Pyrex Passion have timelines that features popular colors and patterns through the years. Just a few notable ones include:Primary colors (red, yellow, blue, plus green) from 1945 to 1950"Snowflakes" (both white on blue and white on black) from the mid-1950s to late 1960s...What Is Pyrex Made Of?Pyrex pieces are made of glass, although the type of glass has changed over the years.Pyrex ovenware was originally made of borosilicate glass due to its durability in heat.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.When opal glass was created in 1936, it was the catalyst for creating the colorful-hued bowls many collectors seek today, although it stopped being made for Pyrex in the 1980s.A soda lime mixture was made around the time of WWII to replace borosilicate.Various lines may have used other types of glass or mixtures, such as the aluminosilicate used in Flameware.The company stopped using borosilicate in the 1990s and went strictly to soda lime silicate glass for retail kitchen products, which has garnered some controversy among Pyrex users since it is not as heat-resistant as borosilicate.