An Improved Process for Dyeing Textile Materials.
Year: 1893

page_text: Date of Application, 5th Aug., 1893
Complete Specification Left, 28th Mar., 1894-Accepted, 28th Apr., 1894 ·
•
PROVISIONAL SPECIFICATION.
[Communicated from abroad by E. MICHAELIS & Co., of Cottbus, in the
Empire of Germany.]
An Improved Process for Dyeing Textile Materials.
I, HENRY HARRIS LAKE, of the Firm of Haseltine Lake & Co., Patent Agents,
45 Southampton Buildings, in the County of Middlesex, do hereby declare the
nature of this invention to be as follows:-
This invention relates to a process for dyeing textile materials in the hypo-
sulphite indigo vat.
According to the said invention the textile materials, after having been charged
with indigo white in the vat, are not exposed to the air as heretofore, but are
immersed directly in water wherein acids or salts having an acid reaction are
dissolved.
The oxygen which is dissolved in the water effects a perfectly uniform blue
coloration, which is considerably accelerated by the presence of acids, or of salts
having an acid reaction, or a mixture of the same.
For this purpose it is very advantageous to use acetic acid or potassium or
sodium acetate, which cause a rapid and yet perfectly uniform action, especially if
these substances are employed in quantitative proportions of about one-half to two
litres of the concentrated solution for one cubic metre of the liquid effecting the
blue coloration. But useful results are also obtained if these concentrations are
varied.
In lieu of acetic acid use may also be inade of sulphuric acid, hydrochloric
acid or other mineral or organic acids, or else their salts in so far as they have
an acid reaction, in quantitative proportions corresponding to the degree of their
acidity.
The liquid which causes the blue coloration may be employed either in the hot
or in the cold state.
It is expedient to move the textile materials after their introduction into the said
liquid, which promotes the process of blue coloration itself and ensures a more
uniform blue.
In order to increase the oxygen contained in the liquid for the blue coloration,
alcohol, ether or other suitable substances may be added to this liquid.
Dated this 5th day of August 1893.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improved Process for Dyeing Textile Materials.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent Agents,
45 Southampton Buildings, in the County of Middlesex, 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 invention relates to a process for dyeing textile materials in the hypo-
sulphite indigo vat.

page_text: According to the said invention the textile matérials after having been charged
with indigo white in the vat, are not exposed to the air as heretofore, but are
immersed directly in water wherein acids or salts. having an acid reaction are
dissolved.
The oxygen which is dissolved in the water effects a perfectly uniform blue
coloration, which is considerably accelerated by the presence of acids, or of salts
having an acid reaction, or a mixture of the same.
For this purpose it is very advantageous to use acetic acid or potassium or
sodium acetate, which cause a rapid and yet perfectly uniform action, especially if
these substances are employed in quantitative proportions of about one-half to two
litres of the concentrated solution for one cubic metre of the liquid effecting the
blue coloration. But useful results are also obtained if these concentrations are
varied.
In lieu of acetic acid use may also be made of sulphuric acid, hydrochloric
acid or other mineral or organic acids, or else their salts in so far as they have
an acid reaction, in quantitative proportions corresponding to the degree of their
acidity.
The liquid which causes the blue coloration may be employed either in the hot
or in the cold state.
It is expedient to move the textile materials after their introduction into the said
liquid, which promotes the process of blue coloration itself and ensures a more
uniform blue.
In order to increase the oxygen contained in the liquid for the blue coloration,
alcohol, ether or other suitable substances may be added to this liquid.
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 correspondents, I declare that what I claim is :-
A process of dyeing textile materials of any kind in the hyposulphite indigo vat;
which consists in that these textile materials, after they have been charged in the
customary manner, with indigo white, are immersed in a solution of acids or of
salts having an acid reaction, or a mixture of the two in water and causing the blue
coloration.
Dated 1
Dated 01 1
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
HÁSELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.