turmeric paper

American  

noun

1. paper treated with turmeric: used to indicate the presence of alkalis, which turn it brown, or of boric acid, which turns it reddish-brown.

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turmeric paper British  

noun

1. chem paper impregnated with turmeric used as a test for alkalis, which turn it brown, and for boric acid, which turns it reddish brown

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Etymology

Origin of turmeric paper

First recorded in 1800–10

Example Sentences

The machine was then worked for a few turns, and alkali immediately appeared at the point of the discharging train which rested on the turmeric paper.

From Experimental Researches in Electricity, Volume 1 by Faraday, Michael

Before the blow-pipe, this species of calculus expands into a kind of white efflorescence, which, when moistened and brought into contact with turmeric paper, stains it red.

From North American Medical and Surgical Journal, Vol. 2, No. 3, July, 1826 by Bache, Franklin

This is dissolved in water, rendered faintly acid with dilute hydrochloric acid, and a strip of turmeric paper immersed for a few minutes in the liquid.

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

Solutions of boric acid give with "turmeric paper," which has been dipped into it and dried, a characteristic red tint.

From A Text-book of Assaying: For the Use of Those Connected with Mines. by Beringer, Cornelius

Test the gas given off with moistened turmeric paper.

From Human Foods and Their Nutritive Value by Snyder, Harry