Improvements in Dyeing Certain Colors on Cotton Yarns and Fabrics.
Year: 1894

page_text: Date of Application, 14th Aug., 1894
Complete Specification Left, 11th May, 1895-Accepted, 15th June, 1895
'
PROVISIONAL SPECIFICATION.
Improvements in Dyeing Certain Colors on Cotton Yarns and
Fabrics.
We, HUGH WYLIE, Turkey-red Dyer and Printer, of Cordale and Dalquhurn
Works, Renton, in the County of Dumbarton, North Britain, and JAMES
MORTON, of Dalquhurn Works, aforesaid, Works Manager, do hereby declare
the nature of this invention to be as follows, that is to say :-
This invention has for its object, by an improved process to fix oxide of chromium
and oxide of iron in various proportions on cotton yarns and fabrics in a manner to
produce fast and permanent colors ranging from olive green to olive brown in
shades of various depths.
In carrying out the invention a solution of bisulphite of chromium is mixed with
a solution of bisulphite of iron, and the goods to be dyed are passed through the
mixture. By way of example it may be stated that for a greenish olive, the
mixture may consist of two gallons of a solution of bisulphite of chromium of a
strength of 12 degrees, Twaddell, and one gallon of a solution of bisulphite of iron
of the same strength. For browner olives the proportion of bisulphite of iron
should be increased.
A woven fabric may be padded in the usual way between rollers; and yarns may
be tramped and wrung in the usual way. On subsequently simply drying or
steaming, or drying and steaming the goods, the oxides of chromium and iron become
fixed on them. When steaming is employed it may in some cases be advantageous
to introduce some ammonia into the steaming box.
Dated this Thirteenth day of August 1894.
EDMUND HUNT,
Applicants' Agent.
Improvements in Dyeing Certain Colors on Cotton Yarns and
Fabrics.
We, HUGH WYLIE, Turkey-red Dyer and Printer, of Cordale and Dalquhurn
Works, Renton, in the County of Dumbarton, North Britain, and JAMES
MORTON, of Dalquhurn Works, aforesaid, Works Manager, 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, that is
to say:
This invention has for its object, by an improved process to fix oxide of
chromium and oxide of iron in various proportions on cotton yarns and fabrics in a
manner to produce fast and permanent colors ranging from olive green to olive
brown in shades of various depths.
In carrying out the invention a solution of bisulphite of chromium is mixed with
a solution of bisulphite of iron, and the goods to be dyed are passed through the
mixture which is by preference cold. By way of example it may be stated that

page_text: for a greenish olive, the mixture may consist of two gallons of a solution of bisulphite
of chromium of a strength of 12 degrees, Twaddell, and one gallon of a solution of
bisulphite of iron of the same strength. For browner olives the proportion of
bisulphite of iron should be increased.
A woven fabric may be padded in the usual way between rollers; and yarns may
be tramped and wrung in the usual way. On subsequently simply drying or
steaming, or drying and steaming the goods, the oxides of chromium and iron become
fixed on them. When steaming is employed it may in some cases be advantageous
to introduce some ammonia into the steaming box.
If found desirable, or in order to render the fixation complete, the goods may be
passed through a hot bath containing phosphate of soda, and carbonate of soda or
of potash, or caustic soda, as is done in various dyeing operations of an analogous
kind.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
The use of bisulphite of chromium and bisulphite of iron substantially in the
manner and for the purposes hereinbefore described.
Dated this Tenth day of May 1895.
EDMUND HUNT,
Applicants' Agent.