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pearl ash

British  

noun

  1. the granular crystalline form of potassium carbonate

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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In the 1780s, American cooks started adding the chemical leavener pearl ash to their pancake batter.

From Slate Feb. 5, 2013

This gave her a solution of pearl ash or potassium carbonate whose concentration she tested with an egg as a hydrometer.

From Creative Chemistry Descriptive of Recent Achievements in the Chemical Industries by Edwin E. Slosson

When all the soap is molten, additions of pearl ash solution are made to give it a finer and smoother texture, render it more transparent, and increase its lathering properties.

From The Handbook of Soap Manufacture by W. H. Simmons

They do not discourage our rice, pot and pearl ash, salted provisions, or whale-oil; but these articles, being in small demand at their markets, are carried thither but in a small degree.

From Memoir, Correspondence, And Miscellanies, From The Papers Of Thomas Jefferson, Volume 3 by Thomas Jefferson Randolph

The industries included a steam sawmill, a brickyard, pearl ash factory, blacksmith, carpenter and shoe shops as well as a good general store.

From The Journal of Negro History, Volume 3, 1918 by Various

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