Improvements in Dyeing Textile Fibres.
Year: 1890

page_text: Date of Application, 3rd Feb., 1890
Complete Specification Left, 1st Nov., 1890-Accepted, 6th Dec., 1890
PROVISIONAL SPECIFICATION.
Improvements in Dyeing Textile Fibres.
I, ROBERT 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:-
This invention relates to the dyeing of wool and other textile fibres various shades
of colours by alternately treating the fibres with metallic salts-such as chrome iron,
copper or lead salts-to form mordants and with the dinitroso or nitroso compounds
derived from the following dioxynapthalines that is to say
a naptho hydroquinone (A₁-A₂)
Dioxynapthaline (A1-A2) (known as Armstrong's dioxynapthaline)
Dioxynapthaline (B-B)
Dioxynapthaline (B-B) known as Ebert and Merz's
ẞ naptho hydroquinone (A-B₁)
Dioxynapthaline (A₁-B) (known as Ewer and Pick's)
in manner analogous to that described, with reference to the like employment of
nitroso compounds derived from the napthols, in the Specification of Letters Patent
granted to Thomas Holliday dated August 17th, 1886 No. 10542.
As an example of the method to be adopted in carrying the present invention into
practical effect I may boil say 100 lbs. of wool in water with about 3 lbs. of bichromate
of soda and 1 lb. of sulphuric acid for about one hour, then wash off and afterwards
pass the wool into a bath of hot water containing say 3 lbs. of a nitroso compound of
one or other of the dioxynapthalines above mentioned.
Dated the 3rd day of February 1890.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Dyeing Textile Fibres.
1 ROBERT 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 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 the dyeing of wool and other textile fibres various shades
of colours by alternately treating the fibres with metallic salts-such as chrome,
iron, copper or lead salts-to form mordants and with the dinitroso or nitroso
compounds derived from the following dioxynaphthalenes, that is to say
a naptho hydroquinone (A-A₂)
Dioxynapthalene (A₁-A3) (known as Armstrong's dioxynapthalene)

page_text: in manner analogous to that described with reference to the like employment of
nitroso compounds derived from the napthols, in the Specification of Letters Patent
granted to Thomas Holliday dated August 17th 1886, No. 10542.
As an example of the method to be adopted in carrying the present invention
into practical effect, I may boil say 100 lbs. of wool in water with about 3 lbs. of
bichromate of soda, and 1 lb. of sulphuric acid for about one hour, then wash off and
afterwards pass the wool into a bath of hot water containing say 3 lbs. of a nitroso
compound of one or other of the dioxynapthalenes above mentioned.
The quantities of wool or other fibre and nature of the metallic salt, acid and
nitroso compounds can be varied according to the result required and the shades of
colour varied by using other dyeing or colouring matters along with or alternatively
with these nitroso compounds. The fibre can be dyed either in a raw, woven, felted
or otherwise partly manufactured or manufactured state.
When cotton or other fibres which have not the same affinity as wool for metallic
oxides are required to be dyed the oxides of the metals mentioned can be fixed in any
of the ordinary manners well known to dyers.
I prefer to use the nitroso compounds in the state of precipitated paste though they
can be used combined with alkali or otherwise, if combined with alkali, the alkali had
better be neutralized in the dye bath with acetic or other acid.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed, I declare that I am aware that it
has been claimed already in Letters Patent No. 17223 of 1889 to effect the dyeing of
textile fibres by forming thereon the products of the combination of the oxides of iron
with the mononitroso compound formed from dioxynapthalene of the melting point
of 186° C. obtained from alpha naphthalenedisulpho acid or beta naphtholmonosulpho
acid F, and to this I make no claim, but with this reservation what I do claim is :-
The dyeing of textile fibres by forming thereon the products of the combination
of the oxides of chrome, iron, copper, lead or alumina with the dinitroso or nitroso
dioxynaphthalenes substantially as described.
Dated the 31st day of October 1890.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.