An Improved Process of Dyeing for Producing Genuine Turkey Red and Rose Colour in Yarn Hanks and Fabrics.
Year: 1894

page_text: Date of Application, 16th Feb., 1894-Accepted, 17th Mar., 1894
COMPLETE SPECIFICATION.
An Improved Process of Dyeing for Producing Genuine Turkey Red
and Rose Colour in Yarn Hanks and Fabrics.
A communication by ERNEST HAEFFELY, of 15, Bredderstrasse, Barmen, in the
Empire of Germany, Dyeworks Manager.
I, WILLIAM PHILLIPS THOMPSON F.C.S., M.I.M.E., of The Agency for
Foreign Patent Solicitors, 6, Lord Street, Liverpool and 6 Bank Street,
Manchester both in the County of Lancaster and 323 High Holborn in the County
of Middlesex, Civil Engineer, do hereby declare the nature of this invention and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:—
This improved process of dyeing for producing genuine Turkey red and rose in
hanks and fabrics differs from the processes hitherto employed in that the fibres
are not merely dyed on their surfaces, but thoroughly dyed through.
The process is as follows:-
The hanks or fabrics are first oiled in a bath of Turkey red oil solution, and
then freed from the superfluous liquid by means of a hydro extractor, centrifugal,
wringing machine, or other suitable means, and, when dry, or even whilst wet,
treated with the following aluminous mordant :
6
100
"
"
of acetate of lime of 15° Beaume
of water
which is brought to a suitable degree for the desired shade of colour.
After the hanks or fabrics have been treated with the above described mordant,
they are exposed, after a preliminary centrifugalling and drying, or whilst still wet,
to the action of a solution of borate of soda in order to fix the mordant.
The subsequent dyeing takes place in a cold bath of alizarine in solution.
The dye bath is used at one of the effective degrees for mordanting, and, during
the process of dyeing, is maintained at a suitable excessive concentration by being
fed. After the dyeing, the alizarine in the solution, which alizarine has not
formed lake by the action of the mordant, is removed by means of a centrifugal,
and the alizarine solvent is removed by the hanks or fabrics being placed in a bath
of suitable chemically composed substances (acidulated water).
The banks or fabrics are then steamed in an oil bath under pressure for 1 to
24 hours, and a clearing under pressure in a suitably strong soap bath follows.
The novelty of this process consists in the previously mordanted hanks or fabrics
being dyed in a cold solution of alizarine, without exhausting the dye bath, and in
the circumstance that, by a suitable regulation of the degree of mordanting, the
mordanted fibres may be made to absorb from the bath, and convert into lake,
exactly the amount of alizarine which is necessary for producing the desired shade
of colour. The dyeing of the previously mordanted materials requires a dye
solution which contains an excess of alizarine, that is to say, more alizarine than
the mordant contained in the fibres can convert into lake.
This process may be employed for all other dyes belonging to the alizarine
Groun

page_text: Having now particularly described and ascertained the nature of the said inven-
tion 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 :-
-
An improved process for producing genuine Turkey red and rose colour on
vegetable yarn in hanks and fabrics, consisting in dyeing the hanks or fabrics in a
cold solution of alizarine (after they have been oiled and mordanted in the usual
manner) then extracting, and afterwards freeing them from the solvent by means
of suitable chemically composed substances and oiling them; the complete develop-
ment and fixing of the alizarine red and rose afterwards taking place in the usual
manner by treating the hanks or fabrics with superheated steam, which process is
finally followed by a clearing in a hot soap bath substantially as hereinbefore
described.
Dated this 15th day of February 1894.
WM. P. THOMPSON & Co.,
Agents.