Fibrous Substances in Aniline Black.
Year: 1887

page_text: Date of Application, 12th Dec., 1887
Specification Accepted, 13th Jan., 1888
Fibrous Substances in Aniline Black.
I, JACQUES GRUNHUT, of South Shields, in the County of Durham, Manufacturing
Chemist, do hereby declare the nature of the said invention, and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement :-
This Invention relates to certain improvements in the process and means of dyeing
in aniline black, cotton, jute, and other vegetable fibres or fibrous substances in the
raw, spun or woven state, described in my former application for Letters Patent filed
on the 11th day of November 1887 and numbered 15432.
In carrying out my invention according to the present improvements, I effect the
mordanting of "the said materials" (which term is herein intended to comprehend all
such materials or substances to be dyed as are hereinbefore referred to) by placing
the same into a suitable vessel containing for each 100 lbs. of the said materials,
about 500 gallons of water, and about one half a pound of Congo Red, or of Benzo
Purpurine, or of Blue Azurine, or of Chrysamine, or of Paraphenylen Blue, or of
Delta Purpurine, or of Hessian Red, or of Benzo Azurine, or of Azo Blue, or of
Congo Corinth, or of Hessian Violet, or of Hessian Purple; or by placing the said
materials into a suitable vessel containing a like aqueous solution of about one half a
pound each of Congo Red and of Blue Azurine, and with about 10 lbs. of Soda
Crystals, or with about 5 lbs. of Carbonate of Soda, or with about 10 lbs. of Carbonate
of Potash; or by placing the said materials into a suitable vessel containing a like
aqueous solution of a mixture of any of the above colouring matters; and in each
or any of such cases boiling the said materials in the solution used for about half an
hour or sufficiently long for the said materials to be sufficiently mordanted or
impregnated with the said colouring matters; as described in the Specification of my
said former application.
After the said materials have been thus treated, they are washed, and are subse-
quently dyed in aniline black by being treated as hereinafter described; that is
to say
The said materials are firstly placed in a suitable vessel containing for each 100 lbs.
of the said materials, about 200 gallons of water, about 8 lbs. of aniline oil, about

page_text: 8 lbs. of Bichromate of Potash, and about 32 lbs. of Hydrochloric Acid, and are
suitably worked about in such solution, which may be either cold or warm, for about
an hour and a half or sufficiently long to be thoroughly impregnated with such
solution, and are then removed and washed.
The said materials are next placed in a suitable vessel containing for each 100 lbs.
of the said materials, about 200 gallons of water and about 8 pints of Sulphuric Acid
or a like or relatively equivalent quantity of any mineral or vegetable acid, and are
left in such solution, which may be either cold or warm, for about half an hour or
sufficiently long to be thoroughly impregnated with such solution, and are then
removed and washed.
Or, in lieu of the said materials being treated according to the process described
in the next preceding paragraph they are boiled in a solution of soap or soda or of
soap and soda for sufficiently long to be thoroughly impregnated with such solution,
and are then removed and washed, and are subsequently boiled in solutions of any of
the aforesaid colouring matters belonging to the Azo group.
The said materials are subsequently, that is after being treated according to either
of the alternative processes described in the two next preceding paragraphs, placed in
a suitable vessel containing for each 100 lbs. of the said materials, about 200 gallons
of water, about 10 lbs. of Carbonate of Soda or any other suitable alkali, or of
Carbonate of Potash or neutral alkali, or of phosphorate of sodium, and about 1 lb. of
Hessian Blue or of any other of the aforesaid Azo colouring matters, such solution
being prepared by boiling the water and adding the said salt and colouring matter,
and the said materials being placed in such solution and boiled therein for about
half an hour or sufficiently long to be thoroughly impregnated with such solution.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is
1. The process and means of dyeing cotton, jute and other vegetable fibres or
fibrous substances in the raw, spun or woven state, in aniline black, consisting in the
successive steps of mordanting the said materials with solutions of coloring matters
belonging to the Azo group, and in subsequently dyeing and treating the said
materials successively in solutions 1) of Aniline Oil, Bichromate of Potash, and Hydro-
chloric Acid; 2) of Sulphuric Acid or any mineral or vegetable acid; and 3) of
carbonate of soda or Potash or other alkali or phosphorate of sodium, and any of the
said coloring matters, substantially as hereinbefore described.
2. The process and means of dyeing cotton, jute and other vegetable fibres or
fibrous substances in the raw, spun or woven state, in aniline black, consisting in the
successive steps of mordanting the said materials with solutions of coloring matters
belonging to the Azo group, and in subsequently dyeing and treating the said
materials successively in solutions, 1) of Aniline Oil, Bichromate of Potash and
Hydrochloric Acid; 2) of Soap or Soda or Soap and Soda and any of the said
coloring matters, and 3) of Carbonate of soda or Potash or other alkali or
phosphorate of sodium and any of the said coloring matters, substantially as herein-
before described.
Dated this 12th day of December 1887
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C.,
Agents for the Applicant.