Pyrex Primary Colour Mixing Bowls
Pyrex Primary Colour Mixing Bowls
Date: Pattern introduced in 1945. Manufactured from 1945-1949.
Maker: Corning Glass Works
Details: Primary Colors (yellow, green, red, blue)
Proclaimed as the “World’s most famous mixing bowl set,” the Primary Colors set was the first of the Pyrex lines produced on white opal ware with colored overlay. The complete set has the most vibrant colors I’ve seen and includes four mixing bowls, which came in yellow, green, red, and blue.
The backstamps are what tell the history of these bowls! 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.
1950 or shortly thereafter, the registered trademark symbol "®" was added below the name, the encircling wording became TRADE MARK above the name, with MADE IN U.S.A. below. A model number and, later, the capacity in pints or quarts were added above, and OVEN WARE below.
This lovely bright and shiny set includes:
One Yellow 4 quart bowl from the 1940’s non-numbered bowls with the backstamp: T.M. REG.in an arch above “PYREX” horizontally in the middle, and “U.S. PAT. OFF” below in an up-facing arch. These early sets items had a more defined foot to the bottom of the bowls. A small yellow stain to the inside bowl and one scratch to the outside.
One Green 2 ½ quart bowl from the later 1950’s – 1970’s sets with the following backstamp: 403 2½ QT. in an arch above an arched “Trade Mark” followed by the number 28 above “PYREX” horizontally in the middle, and ®, then Made In U.S.A. in an up-facing arch with Ovenware in a final arch below. Hardly any scratching to the inside bowl and minor markings to the outside.
One Red 1½ quart bowl from the later 1950’s – 1970’s sets with the following backstamp: 402 1½ QT. in an arch above an arched “Trade Mark” followed by the number 6 above “PYREX” horizontally in the middle, and ®, then Made In U.S.A. in an up-facing arch with Ovenware in a final arch below. Minor scratching to the inside bowl and one small scratch to the outside.
One Blue 1½ pint bowl from the later 1950’s – 1970’s sets with the following backstamp: 401 followed an arched “Trade Mark” followed by the number 6 above “PYREX” horizontally in the middle, and ®, then Made In U.S.A. in an up-facing arch with Ovenware in a final arch below. This bowl has very likely not been used. No scratches inside or out.
A collaborative effort between Corning Glass Works and the United States Government resulted in Pyrex opal ware. They were working together to create a sturdy, lightweight and unbreakable dish for soldiers during WWII. Primary Colors was the first Pyrex opal ware ever produced.
This set is in good, barely used, vintage condition: no chips or cracks, and the outsides are very very strong and bright, nice and shiny, with no fading to the paint, some have minimal scratches, but nothing too noticeable or unexpected given their age. The insides have some utensil scratches, but hardly any in comparison to most sets. A nice set for display or everyday use.
*The harsh chemicals in some of today's dish-washing detergent will damage these bowls over time, making the shiny finish become chalky. I recommend hand washing them to preserve their beauty. Do not put them in the dishwasher or they will lose their shine and the colors will become clouded and then fade away.
Blue, 1 1/2 pint, 5 3/4" diameter
Red, 1 1/2 quart, 7" diameter
Green, 2 1/2 quart, 8 1/2" diameter
Yellow, 4 quart, 10 1/4" diameter