1918 Pyrex Loaf Pan-Corning, NY

This is one of the earliest made Pyrex borosilicate glass ovenware pieces.

Excellent condition

1918 Clear Pyrex Loaf Pan with the Spray Pattern made in Corning, New York

In 1908, Corning Glass Works, in Corning, New York, developed a borosilicate glass that could withstand extreme heat and cold without breaking. They called the glass "Nonex" and used it in battery jars and railroad lanterns. Ironically, Nonex's strength meant battery jars and lanterns no longer broke and needed replacing, so the company looked for other ways to use its heatproof glass. In 1913, a woman named Bessie Littleton, who was married to Corning scientist Jesse Littleton, found it. After an earthenware baking dish cracked in her hot oven, Bessie asked Jesse to bring home a Nonex battery jar for her to experiment with on a sponge cake. Bessie baked the cake in the jar, and it turned out perfectly, and the jar stayed intact at high oven temps. This sent Corning down a new path of pie plate cookware experiments with Nonex glass. In 1915, the company launched its first Pyrex line (Pyrex combined "pie" and "Nonex") with 12 baking pieces, including pie plates and a loaf pan. The new glass ovenware was patterned in a floral arrangement simply titled "Spray" which was an early American term to describe a flat floral arrangement. The invention of Pyrex glass quickly became the world's most used and trusted glass ovenware. In 1998, Corning USA switched to soda-lime traditional glass which made borosilicate Pyrex glass production a memory. Vintage and antique borosilicate Pyrex glass can be identified by the "yellow tint" on molding edges from light reflecting through the glass. Soda-lime glass reflects a "bluish-green" tint seen in today's ovenbake glassware.
Thank you to Katie Monsell of the Rakow Research Library at the Corning Museum of Glass for the help identifying this item.

Weighs 1 pound 7 ounces
Measures 9-1/4” X 5-1/8” X 3”

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