IMPROVEMENTS IN DYEING WITH ANILINE BLACK
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I, WILLIAM PHILLIPS THOMPSON Fel. Inst. P.A. of the Agency for Foreign
Patent Solicitors 6 Lord Street Liverpool, in the County of Lancaster and
323 High Holborn in the County of Middlesex, Civil Engineer do hereby declare
the nature of the said invention for "IMPROVEMENTS IN DYEING WITH ANILINE
BLACK (a communication from abroad by Monsieur André Descroix of Ville-
franche (Rhône) in the Republic of France, trading under the style or firm of
Descroix Frères, Chemist,) to be as follows:-
"
This invention consists of a process of dyeing woven fabrics and textile materials
of every description with aniline black by printing alone, in the cold, without
subsequent aeration, and without deterioration of the material or fabric.
In carrying the process into effect a cold solution of aniline, and of bichromate
of potash or of soda, or of any other soluble bichromate is printed upon the fabric.
The fabric or other material is then rolled automatically upon a small roller,
when it is left until the black is sufficiently developed, a process which requires a
longer or shorter time according to the proportions of the dyeing solution. The
black may be developed in from fifteen minutes to fifteen hours as may be
requisite.
The goods are then washed, soaped and finished in the usual manner.
The proportions of aniline and of bichromate used are preferably two parts of
bichromate to one part of aniline, dissolved in a quantity of acid sufficient to
saturate the alkali of the bichromate.

page_text: COMPLETE SPECIFICATION.
.I, WILLIAM PHILLIPS THOMPSON, Fel. Inst P.A. of the Agency for Foreign
Patent Solicitors, 6 Lord Street, Liverpool in the County of Lancaster, and
323 High Holborn, in the county of Middlesex, Civil Engineer do hereby declare
the nature of the said invention for "IMPROVEMENTS IN DYEING WITH ANILINE
BLACK" (a communication from abroad by André Descroix of Villefranche (Rhône)
in the republic of France, trading under the style or firm of Descroix Frères,
Chemist), and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
2
This invention consists of a process of dyeing woven fabrics and textile materials
of every description with aniline black by printing alone, in the cold without
subsequent aeration and without deterioration of the material or fabric.
In carrying the process into effect a cold solution of aniline, and of bichromate
of potash or of soda or of any soluble bichromate is printed upon the fabric.
The fabric or other material is then rolled automatically upon a small roller,
when it is left until the black is sufficiently developed, a process which requires a
longer or shorter time according to the proportions of the dyeing solution. The
black may be developed in from fifteen minutes to fifteen hours as may be
requisite.
The goods are then washed, soaped, and finished in the usual manner.
The proportions of aniline and of bichromate used are preferably two parts of
bichromate to one part of aniline, dissolved in a quantity of acid sufficient to
saturate the alkali of the bichromate.
Baving now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed as communicated to
me by my foreign correspondent, I declare that what I claim is
The method of producing aniline black on fibres or woven fabrics of any kind,
without aeration, in the cold by printing upon them with a cold solution of aniline
and of bichromate of soda or of potash or other suitable bichromate, substantially
as described.