Year: 1887

page_text: Date of Application, 25th Feb., 1887
Complete Left, 15th Nov., 1887
Complete Accepted, 16th Dec., 1887
[Communicated from abroad by THE FARBWERKE VORMALS MEISTER LUCIUS and
BRUNING, of Hoechst-am-Main, in the Empire of Germany, carrying on business
as Chemical Manufacturers.]
1, OLIVER IMRAY of No. 28 Southampton Buildings Chancery Lane in the County
of Middlesex, Fellow of the Institute of Patent Agents do hereby declare the nature of
this invention to be as follows:-
The methylene-blue employed hitherto contains the colouring matter in the form of a
chlorzine-bicompound. Now this chlorzine contained in the colouring matter has the
effect that when textile fabrics printed with the ordinary methylene-blue of commerce,
are being steamed somewhat intensively the fibres become short and the colouring
matter itself is partly destroyed.
In order to avoid this defect in the ordinary methylene-blue of commerce there is,
according to the present invention, prepared from the same a colouring matter which
does not contain any chlorzinc and which gives much better technical results. More-
over this product dissolves far more easily, a fact of great importance in the art of
printing.
According to this invention the zinc is precipitated from the solution of the ordinary
methylene-blue of commerce by means of suitable precipitating agents such as alkalies,
carbonates of alkalies or similar basic compounds, or sulphides or by means of oxalates
or phosphates of alkalies, and by addition of common salt (or by recrystallization) the
dissolved colouring matter is separated from the filtrate.
Example: 100 parts of the methylene-blue-chlorzine-double-salt are dissolved in
about 1000 parts of boiling water and to this solution are added 14 parts of calcined
soda. From the liquid which is filtered hot from off the precipitate, the colouring
matter will crystallize on cooling down.
Dated this 25th day of Fahruary 1887
ABEL & IMRAY,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improved Manufacture of a Methylene Blue Specially Adapted for
Printing on Textile Fibres.
I, OLIVER IMRAY, of No. 28 Southampton Buildings, Chancery Lane, in the County
of Middlesex, Fellow of the Institute of Patent Agents, 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:-
The methylene-blue employed hitherto contains the colouring matter in the form of
a zinc chloride bicompound.
Now this zinc chloride contained in the colouring matter has the effect that when
textile fabrics printed with the ordinary methylene blue of commerce, are being
steamed somewhat intensively the fibres become short and the colouring matter itself is
partly destroyed.
In order to avoid this defect in the ordinary methylene blue of commerce there is,
according to the present invention, prepared from the same a colouring matter which
does not contain any zinc chloride and which gives much better technical results.
Moreover this product dissolves far more easily, a fact of great importance in the art
of printing.
According to this invention the zine is precipitated from the solution of the ordinary
methylene-blue of commerce by means of suitable precipitating agents such as alkalies,
carbonates of alkalies, or similar basic compounds or sulphides or by means of oxalates
or phosphates of alkalies and by addition of common salt (or by recrystallization) the
dissolved colouring matter is separated from the filtrate.
Example: 100 parts of the methylene-blne zinc-chloride-double-salt are dissolved
in about 1000 parts of boiling water and to this solution are added 14 parts of calcined
soda. From the liquid which is filtered hot from off the precipitate,. the colouring
matter will crystallize on cooling down.
Having now particularly described and ascertained the nature of this invention and
in what manner the same is to be performed, I declare that what I claim is :-
An improved manufacture of blue colouring matter specially adapted for printing on
textile fibres wherein the zine is precipitated from the solution of methylene-blue zinc-
chloride double-salt by means of suitable precipitating agents such as alkalies, car-
bonates of alkalies, or similar basic compounds, sulphides, or oxalates, or phosphates of
alkalies the colouring matter being then obtained from the resulting solution thereof
either by the addition of common salt or by crystallization or evaporation.
Dated this 15th day of November 1887
ABEL & IMRAY,
. Agents for the Applicant.