iron mold

American  

noun

1. a stain on cloth or the like made by rusty iron or by ink pigmented with an iron derivative.

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Etymology

Origin of iron mold

First recorded in 1595–1605

Example Sentences

She has even bought iron molds from shuttered factories.

From New York Times

“Miller designed the iron molds that became pitchers, creamers and other items, and was excellent at it,” says Cooper.

From Washington Times

A piece of cotton thread must be heated in a furnace in an iron mold, which would prevent the thread from burning by keeping out the air.

From Project Gutenberg

The heavy November twilight caught them as the train roared through the Bobmin valley past hillsides stained with dead bracken—like iron mold, Jenny thought.

From Project Gutenberg

To a man of Bismarck’s iron mold, the exercise of power is the breath of life; this made it a tragedy for the aged Bismarck to withdraw.

From Project Gutenberg