Improvements in or in connection with Dyeing certain Colours on Vegetable Fibres, Yarns, and Fabrics.
Year: 1897

page_text: Date of Application, 18th Mar., 1897
Complete Specification Left, 4th Dec., 1897-Accepted, 8th Jan., 1898
PROVISIONAL SPECIFICATION.
Improvements in or in connection with Dyeing certain Colours on
Vegetable Fibres, Yarns, and Fabrics.
We, F. A. GATTY AND COMPANY LIMITED, of Bannister Hall Works, near Preston, in
the County of Lancaster, Bleachers and Dyers, and VICTOR HERBERT GATTY, of the
same place, Bleacher and Dyer, do hereby declare the nature of this Invention to be
as follows:-
This invention relates to improvements in or in connection with dyeing certain
colours on vegetable fibres, yarns and fabrics.
In order to greatly increase the fastness against the action of acids of colours
produced on vegetable fibres, yarns and fabrics by the oxides or insoluble salts of iron
and chromium fixed separately or together we treat the fibres, yarns or fabrics upon
which the oxides or insoluble salts (or one of them) have already been fixed with a
solution of a soluble silicate. We find that a solution of silicate of soda of a strength
of two degrees Twaddle, gives good results and we prefer to use it hot but do not
confine ourselves to any strength or temperature.
It must be understood that this result is not attained by mixing silicate of soda
or other soluble silicate in any proportion with the precipitant used to fix the oxides
or insoluble salts (where they are fixed by means of a precipitant) but that the
treatment with the soluble silicate is an additional process subsequent to the fixation
in any suitable way of the oxides or insoluble salts of iron and chromium upon the
fibres, yarns or fabrics.
H. B. BARLOW & GILLETT,
Agents for Applicants.
UPOT
Improvements in or in connection with Dyeing certain Colours on
Vegetable Fibres, Yarns, and Fabrics.
We, F. A. GATTY AND COMPANY LIMITED, of Bannister Hall Works, near Preston, in
the County of Lancaster, Bleachers and Dyers, and VICTOR HERBERT GATTY, of the
same place, Bleacher and Dyer, do hereby declare the nature of this Invention

page_text: 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 improvements in or in connection with dyeing certain
colours on vegetable fibres, yarns and fabrics.
In order to greatly increase the fastness against the action of acids of colours
produced on vegetable fibres, yarns and fabrics by the oxides or insoluble salts of iron
and chromium fixed separately or together we treat the fibres, yarns or fabrics upon
which the oxides or insoluble salts ((or one of them) have already been fixed with a
solution of a soluble silicate.
For instance, we take the fibres, yarns or fabrics upon which the oxides or insoluble
salts (or one of them) have already been fixed in any suitable way and subject them to
the action of a solution of a soluble silicate such as silicate of soda. We find that a
solution of two degrees Twaddle gives good results but the strength is not material. We
prefer to use this solution at or near boiling point in which case we find that an
immersion of fifteen minutes in the.solution is sufficient to give good results but the
treatment may be continued for an hour; a simple passage of the goods of one
minute's duration through the boiling solution is sufficient to materially increase the
fastness of the colours against the action of acids. If the solution be used at a lower
temperature a longer immersion is necessary to produce the same result.
The treatment with the silicate solution may be performed in any way convenient
or customary in dyeing operations or the goods may be simply passed through the
boiling solution and packed together or steamed whilst saturated with it.but we prefer
to keep the goods immersed in the boiling solution for at least fifteen minutes.
After this treatment the goods are simply washed and may then be dried. The
colours may then be subjected without injury to the action of acids of a strength
which would have entirely altered or destroyed them before treatment.
It must be understood that this result is not attained by mixing silicate of soda or
other soluble silicate in any proportion with the precipitant used to fix the oxides.or
insoluble salts (where they are fixed by means of a precipitant) but that the treat-
ment with the soluble silicate is an additional process subsequent to the fixation in 1
any suitable way of the oxides or insoluble salts (or one of them) of iron and chromium
upon the fibres, yarns or fabrics.
As examples of suitable methods of fixing the oxides ar insoluble salts the following
may be cited :-
By impregnation of the fibres, yarns or fabrics with solutions of any soluble salts of
iron of chromium basic or normal followed with or without a previous drying by
and
or
fixation with an alkali such as soda potash ammonia or their carbonates or by
ammonia gas or in any other suitable way or in the case of salts of iron
and chromium containing volatile acids such as the acetates or bisulphites
by fixation by means of steaming or expelling the volatile acids in any other
suitable way or by depositing the oxides or insoluble salts on the fibres, yarns
or fabrics from alkaline solutions of iron and
or
of chromium.
Having now particularly described and ascertained the nature of this said Inven⚫
tion and in what manner the same is to be performed we wish it to be
understood that we do not confine ourselves to any particular soluble silicate or to any
particular strength or temperature of the solution employed but we declare that what
we claim is :-
1. The additional process herein described of treating vegetable fibres, yarns or
fabrics, upon which the oxides or insoluble salts of iron and chromium (or one such
oxide or salt) have already been fixed, with a solution of a soluble silicate whereby the
fastness of the colours produced by such oxides or insoluble salts is greatly increased
against the action of acids.
2. Vegetable fibres, yarns or fabrics upon which the oxides or insoluble salts of

page_text: iron and of chromium (or one of them) have been fixed in any suitable way and
rendered additionally fast against the action of acids by subsequent treatment with a
soluble silicate in an additional process substantially as herein described.
Dated this 3rd day of December 1897.
H. B. BARLOW & GILLETT,
Agents for Applicant, 17 St. Ann's Square, Manchester.