As a consequence, the methods of dyeing furs with aniline black have also become simpler and more efficient.
aniline black is the name given to an insoluble black dyestuff produced by the oxidation of aniline in an acid medium.
The chemical composition and constitution of aniline black has not yet been worked out.
This can account for the fact that aniline black dyeings usually turned green after a short time.
A purer benzol was subsequently required for the manufacture of aniline black and other dye-stuffs.
Strictly speaking, aniline black is also an Oxidation dye, but it is usually considered in a class by itself.
Any of this class of black may be so topped with aniline black if thought necessary A very fast black is thus got.
The chemistry of aniline black is still incomplete, but it would appear that there are several oxidation products of aniline.
aniline black was by no means a new dye when the French succeeded in producing it on furs.
Since the introduction of aniline black, some dyers use it in place of logwood both for wool and cotton.