Improvements in making Aniline Black for Dyeing or Printing.

Practical Magazine 14, 1876

(Chemistry applied to the Arts, Manufactures, &c.
Dyeing, Calico Printing, Bleaching, Tanning, and Allied Subjects.)

M. PINCKNEY’s process for making aniline black consists in treating an aniline salt with compounds of vanadium or uranium, either alone or together with a nickel salt and an oxidizing agent such as the chlorates.

For dyeing, the textures are dipped in a mixture of the following substances, or first in the metallic bath and afterwards in the bath containing aniline salt and chlorate. The proportions of the various ingredients may vary according to the nature of the tissues to be dyed, but the following proportions seem best: -
Hydrochlorate of aniline ... 150 parts
Vanadium salt ... 18'5 "
Chloride of nickel ... 20 "
Chlorate of potash ... 100 "
Water ... 2500 "

The dyeing may be done cold or hot.

For printing the following proportions may be used: —
Hydrochlorate of aniline ... 150 parts
Uranium or Vanadium salt ... 18.5"
Chloride of nickel ... 20 "
Chlorate of soda or potash ... 150 or 100 "
Water ... 1200 "

Thicken with gum or dextrine.

- Moniteur de la Teinture.

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