nigrosine definition

  • noun:
    • Any of a course of dyes, differing from blue to black, found in the make of inks as well as for dyeing wood and fabrics.
    • A dark blue synthetic dyestuff of induline team.
    • A dark blue dyestuff, for the induline team; -- called in addition azodiphenyl blue.
    • A coal-tar shade found in dyeing, prepared through the hydrochlorid of violaniline.
    • The name is put on three various coal-tar colors:
    • Spirit-soluble nigrosine, which can be closely allied to spirit-soluble induliue.
    • Water-soluble nigrosine, which is the sodium salt of specific snlphonic acids of spirit-soluble nigrosine.
    • Methylene grey (which see, under grey).

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