Year: 1885

page_text: 3
I THOMAS HOLLIDAY of the firm of Read Holliday & Sons of Huddersfield in
the County of York Manufacturing Chemist, do hereby declare the nature of this
invention to be as follows:-
I have found that oxide of lead or the compounds formed by oxide of lead and
oily bodies, which compounds I call “lead soap” when fixed on cotton will take
up alpha- or beta-napthols from mixtures of those napthols with, or their solutions
in, water; and this invention has for its object the utilization of this action for the
purpose of fixing azo colours on cotton or other vegetable fibres, either in a raw
state, spun, woven, or otherwise manufactured.
"
"
Oxide of lead may be fixed on the fibre by passing the cotton through a weak,
saturated solution of oxide of lead in caustic alkali that is to say a solution of
caustic alkali may be saturated with about as much oxide of lead as it will
dissolve and the solution employed weak say for instance, of a strength of 1° to 2°.
Beaume and "lead soap" may be formed by passing the cotton through a weak.
solution of soluble soap, or oily emulsion, either before, or after, passing it through
the solution of oxide of lead. The cotton, on which oxide of lead, or
lead soap,
is so fixed is then ready for the formation of such azo colours as are formed with
alpha-, or beta-, napthol and diazo, or diazoazo, compounds preferably, such as are
insoluble, or nearly insoluble, in water; which colours may be formed by any
suitable process, more especially will such processes as are given in the specifi-
cations of Letters Patent N° 2757 dated 6th July 1880 granted to Thomas Holliday
and Robert Holliday; N° 1638 dated 14th April 1881 granted to Thomas Holliday;
No 2946 dated 21st June 1882 granted to Charles Holliday; and N° 9701 dated
3 July 1884 granted to Dan Dawson and in the specification filed in pursuance of
my application for Patent Nº 2580 dated 25th February 1885 be found suitable for.
the purpose.
}

page_text: www
other Vegetable Fibre.
I THOMAS HOLLIDAY of the firm of Read Holliday & Sons of Huddersfield in
the County of York, Manufacturing Chemist, do hereby declare the nature of my
invention for IMPROVEMENTS IN THE PRODUCTION OF AZO COLORS ON COTTON OR
OTHER VEGETABLE FIBRE, and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
:
I have found that oxide of lead or the compounds formed by oxide of lead and
oily bodies, which compounds I call "lead soap" when fixed on cotton will take
up alpha or beta-napthols.from mixtures of those napthols with, or their solutions
in water; and this invention has for its object the utilization of this action for the
purpose of fixing azo colors on cotton or other vegetable fibres, either in a raw
state, spun, woven, or otherwise manufactured..
Oxide of lead may be fixed on the fibre by passing the cotton through a weak
saturated solution of oxide of lead in caustic alkali that is to say a solution of
caustic alkali may be saturated with about as much oxide of lead as it will
dissolve and the solution employed weak, say for instance, of a strength of 1° to 2°
Beaume and "lead soap "may be formed by passing the cotton through a weak
solution of soluble soap, or oily emulsion, either before, or after, passing it through
the solution of oxide of lead. The cotton on which oxide of lead, or "lead soap,"
so fixed is then ready for the formation of such azo colours as are formed with
alpha-, or beta-napthol and diazo or diazoazo, compounds preferably, such as are
insoluble, or nearly insoluble, in water; which colors may be formed by any
suitable process, more especially will such processes as are given in the specifi-
cations of Letters Patent N° 2757 dated 6th July 1880 granted to Thomas Holliday
and Robert Holliday; N° 1638 dated 14th April 1881 granted to Thomas Holliday;
No 2946 dated 21st June 1882 granted to Charles Holliday; and N° 9701 dated
3rd July 1884 granted to Dan Dawson and in the specification filed in pursuance
of my application for Patent N° 2580 dated 25th February 1885 be found suitable
for the purpose.
°
Other methods of fixing oxide of lead or lead soap' may be used' such as passing
the fibre through a solution of a lead salt then through caustic soda solution when
the lead oxide will be fixed and then through a solution of soap. when lead soap
will be fixed.
Having now particularly described and ascertained the nature of my said

page_text: not claim or confine myself to any particular method of fixing oxide of lead or
lead soap on the fibre or any particular method of forming the azo colours but that
what I do claim is :-
The production of azo colours on cotton or other vegetable fibre by fixing oxide
of lead or lead soap.on the fibre and forming thereon such colours as are formed
by combining the napthols with diazo or diazoazo compounds substantially as
described.