Improvements in the Production of Quinonoxime Colouring Matters (Nitroso-phenols) upon the Fibre.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in the Production of Quinonoxime Colouring Matters
(Nitroso-phenols) upon the Fibre.
I, GEORGE WILLIAM JOHNSON, of 47, Lincoln's Inn Fields, in the County of
London, Patent Agent, do hereby declare the nature of this invention (which has
been communicated to me from abroad by Kalle & Co., of Biebrich on the Rhine,
in the Empire of Germany) to be as follows:-
Although quinonoxime colouring matters (nitroso-phenols) are very permanent
or fast especially against the action of light their employment in printing on
fabrics has hitherto been very limited on account of various difficulties which are
incidental to their employment (for instance in the steaming process) and which
arise from the peculiar nature of this class of colouring-matters.
an
My foreign correspondents have succeeded in overcoming these difficulties by
proceeding in the following manner. Instead of printing the finished dyestuff
and fixing it upon the fibre by steaming the fabric so printed the quinonoximes
(or rather lakes thereof) are produced directly on the fibre without applying the
steaming process. If a fabric be impregnated with a mixture of a phenol (such
for instance as the naphthols dioxynaphthalenes, resorcine, and the like)
of a mordant suitable for quinonoxime colouring matters, and of
acid such as tartaric acid, and if the fabric so impregnated be dried and passed
through a neutral, and preferably boiling, nitrite solution, the dyestuff is at once
developed, and at the same time fixed on the fibre. Of course the same result is
obtained if a previously mordanted fabric be impregnated with a mixture of a
phenol and an acid and passed through a nitrite solution. The various ingredients
necessary for the colour-lake to be formed, can also be applied to the fibre in
different order, or different mixture. The fabric can, for instance, be impregnated
with a mixture of a phenolate and nitrite and can be introduced afterwards into
an acidulated mordant bath or it can be impregnated with nitrite and a mordant
and passed through an acid or neutral solution of a phenol and so forth but the
first described manner according to this invention is preferable.
The invention may be performed as follows:-
EXAMPLE I.

page_text: padded with an aqueous solution of the mixture and then be dried and the colour
developed in the aforesaid manner.
EXAMPLE II.
The cloth is padded or printed with a mixture of
288 grs. alpha-naphthol.
800 grs. acetine,
280 grs. copperas.
150 grs. tartaric acid and
4000 grs. of either water or thickening.
i
and after drying developed in a boiling nitrite bath. In this manner also green
shades are obtained.
i
My foreign correspondents have found that caustic soda lye and other substances
which mechanically, or chemically, prevent the formation, or fixing of the
colouring matters, can be employed, with good result, as discharges in the herein-
before described printing, or padding, processes.
Doted th 1991 do. of Wahma ……. 1000
Improvements in the Production of Quinonoxime Colouring Matters
(Nitroso-phenols) upon the Fibre.
I, GEORGE WILLIAM JOHNSON, of 47, Lincoln's Inn Fields, in the County of
London, Patent Agent, do hereby declare the nature of this invention (which has
been communicated to me from abroad by Kalle & Co., of Biebrich on the Rhine,
in the Empire of Germany) and in what manner the same is to be performed to
be particularly described and ascertained in and by the following statement:--
Although quinonoxime-colouring matters (nitroso-phenols) are very permanent
or fast, especially against the action of light their employment in printing on
fabrics has hitherto been very limited on account of various difficulties which are
incidental to their employment (for instance, in the steaming process) and which
arise from the peculiar nature of this class of colouring matters.
My foreign correspondents have succeeded in overcoming these difficulties by
proceeding in the following manner. Instead of printing the finished dyestuff
and fixing it upon the fibre by steaming the fabric so printed, the quinonoximes
(or rather lakes thereof) are produced directly on the fibre without applying the
steaming process. If a fabric be impregnated with a mixture of a phenol (such for
instance as the naphthols, dioxynaphthalenes, resorcine, and the like, that is to
say phenols the orthonitroso-derivatives (quinonoxime) of which form coloured lakes
with metallic salts), of a mordant suitable for quinonoxime-colouring matters, and
of an acid such as tartaric acid, and if the fabric so impregnated be dried and passed
through a neutral, and preferably boiling, nitrite solution, the dyestuff is at once
. developed, and at the same time fixed on the fibre. Of course the same result is
obtained if a previously mordanted fabric be impregnated with a mixture of a
phenol and an acid and passed through a nitrite solution. The various ingredients
necessary for the colour-lake to be formed, can also be applied to the fibre in
different order, or different mixture. The fabric can for instance be impregnated

page_text: with a mixture of a phenolate and nitrite and can be introduced afterwards into
an acidulated mordant-bath or it can be impregnated with nitrite and a mordant
and passed through an acid or neutral solution of a phenol, and so forth, but the
first described manner according to this invention is preferable.
The invention may be performed as follows, but it is not limited to the precise
details given.
It is then dried, which may be done by passing it between hot plates, and is then
introduced into a boiling sodium nitrite solution of, for instance 5 per cent. In
this manner green shades are obtained.
Instead of printing the mixture with the aid of a thickening, the fabric can be
padded with an aqueous solution of the mixture, and then be dried and the colour
developed in the aforesaid manner.
EXAMPLE II.
The cloth is padded or printed with a mixture of
288 grs. alpha-naphthol.
800 grs. acetine.
280 grs. copperas.
150 grs. tartaric acid and
4000 grs. of either water, or thickening
and after drying developed in a boiling nitrite bath. In this manner also green
shades are obtained.
My foreign correspondents have found that caustic soda-lye and other substances,
which mechanically, or 'chemically, prevent the formation, or fixing, of the
colouring matters, can be employed, with good result, as discharges in the hercin-
before described printing, or padding, processes.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:-
-
1. The production of quinonoxime-lakes upon the fibre, by impregnating the fibre
with a mixture consisting of a phenol, of a mordant suitable for fixing quinonoxime
colouring matters and of an acid or of a suitable acid salt, and by passing the
goods so impregnated, after drying them, through an aqueous solution of a nitrite,
or by padding the goods with nitrite substantially as described.
2. The improvements in the production of quinonoxime colouring matters
(nitroso-phenols) upon the fibre substantially as herein before described.
Dated this 22nd day of November 1898
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.