nigrosine

American  

[nahy-gruh-seen, -sin] / ˈnaɪ grəˌsin, -sɪn /

Also nigrosin

noun

Chemistry.

1. any of the class of deep blue or black dyes obtained by the oxidation of aniline, used as coloring agents in inks and shoe polishes and for dyeing leather, wood, textiles, and furs.

---

nigrosine British  

/ ˈnɪɡrəsɪn, -sɪn, ˈnɪɡrəˌsiːn /

noun

1. any of a class of black pigments and dyes obtained from aniline: used in inks and shoe polishes and for dyeing textiles

---

Etymology

Origin of nigrosine

1890–95; < Latin nigr- (stem of niger ) black, dark + -ose ¹ + -ine ¹

Example Sentences

Nigrosine, nig′rō-sin, n. a coal-tar colour prepared from the hydrochloride of violaniline.

From Project Gutenberg

Shaw's—Borax, 3 ozs.; orange shellac, 5 ozs.; water, q. s.; boil and add soluble aniline black or nigrosine, q. s.

From Project Gutenberg

Black: Nigrosine black, four ounces, dissolved in one gallon of boiling water.

From Project Gutenberg

Closely related thereto is a bluish-grey called “nigrosine,” obtained by heating nitrobenzene with aniline, as well as a certain bluish by-product obtained during the formation of magenta, and known as “violaniline.”

From Project Gutenberg

By the chloring of the wool the intensity of the shade dyed is increased to such a degree that when dyeing with Acid black, Naphthol black, Naphthol green, Nigrosine, Fast blue, Water blue, and some others dyed in an acid bath, but little more than half the dye used on unchlored wool is required, while with Induline, more even and intense shades are obtained than is otherwise possible.

From Project Gutenberg