acid dye

American  

noun

Chemistry.

1. any of a class of dyes containing one or more acidic groups, as the sulfo group: used in acid solution chiefly for dyeing wool and silk.

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acid dye British  

noun

1. a dye in which the chromophore is part of a negative ion usually applied from an acidic solution

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Etymology

Origin of acid dye

First recorded in 1885–90

Example Sentences

Without knowing exactly which acid dyes are in the ties you will be using, it is best to practice caution and avoid breathing in potentially dangerous dye fumes when heating the ties in hot water.

From Scientific American

The acid dyes are so called because they are of an acid character and are applied in an acid dye-bath.

From Project Gutenberg

She works on wool rugs with acid dyes and watercolors to create stained, eaten-away works that suggest woolly mammoth hides attacked by avant-garde cave painters.

From New York Times

The Coarsely Granular Eosinophile Cell.—These large cells contain a number of well-defined granules which stain deeply with acid dyes.

From Project Gutenberg

The acid dyes specially suited for the production of soluble neutral stains are the easily soluble salts of the polysulpho-acids.

From Project Gutenberg