nigrosine


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nigrosine

[′nī·grə‚sēn]
(materials)
Any of a group of blue or black azine dyes used for coloring inks, shoe polish, leather, and wood; can be water-, alcohol-, or oil-soluble.
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The 1959 version of "Shark Sense" extols the virtues of the "Shark Chaser" and its nigrosine dye cake that downed aviators were supposed to release into the water, with the assumption that it would repel sharks and hide the aviator from the shark's sight (U.
Available in concentrations up to 40% in nylon 6 and 66, the nigrosine black master-batches boast advantages over carbon black dispersions.
The ink contained `a synthetic dye of the nigrosine type' which, he concluded, was not available in Victorian times.