Difference between revisions of "Nicholson Blue"
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Revision as of 07:10, 24 July 2013
Description
A water-soluble blue aniline dye. Nicholson blue is the sodium salt of triphenylrosaniline-monosulfonic acid. Discovered in 1862 by Nicholson, it readily forms a permanent blue color on silk and wool. Nicholson blue was sometimes mixed with barwood to form an inexpensive imitation of indigo.