Year: 1887

page_text: Date of Application, 26th Mar., 1887
Complete Left, 24th Dec., 1887
Complete Accepted, 27th Jan., 1888
other Colors,
We, ROBERT CHADWICK and JOHN WILLIAM CONSTERDINE-CHADWICK, trading
as Robert Chadwick & Son of Clensmore Chemical Works, Kidderminster, County
of Worcester, Manufacturers, do hereby declare the nature of this invention to be as
follows:-
Our invention relates to the dyeing of yarns or fabrics black, blue, and other
colors by a single-bath process. According to the processes now commonly used, the
dyeing is effected by firstly mordanting the yarn for one or two hours in a bath
composed of bichromate of potash, with or without other ingredients, after which it is
dyed in a bath of logwood chip or extract, with or without other substances, in which
bath it remains for about 40 minutes.
According to our present invention we effect the dyeing of the yarn or fabric, in a
single bath formed of the dye compound described in our application for a Patent
No. 3280 of 1887, for which purpose we prefer to proceed in the following manner.
The article to be dyed is preferably first well washed or scoured and cleansed from all
grease, after which, in order to dye a raven black, we add to a bath of from three to.
four hundred galions of water, that may be either cold or boiling, about eight pounds
of the said dye compound, to which is added sufficient vitriol to render the bath
slightly acid. Into this bath, we enter, for example, about 120 lbs. of carpet yarn,
which is kept constantly turned, and after a lapse of about 30 minutes the material
will be found to be dyed a fast black; the more of the extract is used and the longer
the materal remains in the bath, the better will be the result.
In order to obtain different shades of black, a little blue, red, yellow or other
coloring matter may be added at the discretion of the user. If it is desired to dye the

page_text: articles other colors, such as bottle or other greens, peacock or other blues, reds or
rubies, the same compound above mentioned is used in combination with other
ingredients such as are well known to dyers for obtaining those colors with logwood
dyes.
The above described proportions are only given by way of example, and we dc
therefore not limit ourselves to them.
By our above described improved process, a considerable saving of labor, fuel and
steam will be effected, while at the same time the duration of the process is greatly
reduced.

page_text: We, ROBERT CHADWICK, and JOHN WILLIAM CONSTERDINE CHADWICK, trading
as Robert Chadwick & Son, of Clensmore Chemical Works, Kidderminster, County
of Worcester, Manufacturers, 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 :-
Our invention relates to the dyeing of yarns or fabrics, black, blue, and other colors
by a single bath process. According to the processes now commonly used the dyeing
is effected by firstly, inordanting the yarn for one or two hours in a bath composed
of bichromate of potash, with or without other ingredients, after which it is dyed in
a bath of logwood, chip, or extract with or without other substances, in which bath it
remains for about 40 minutes.
According to our present invention we effect the dyeing of the yarn or fabric in a
single bath formed of the dye compound described in the specification to our appli-
cation for a patent No. 32807 for which purpose we prefer to proceed in the following
manner.
The article to be dyed is preferably first well washed or scoured and cleansed from
all grease, after which in order to dye a raven black we add to a bath of from three
to four hundred gallons of water, that may be either cold or boiling, about eight
pounds of the said dye compound, to which is added sufficient vitriol to render the
bath slightly acid.
Into this bath we enter for example about 120 lbs. of carpet yarn, which is kept
constantly turned, and after a lapse of about 30 minutes the material will be found to
be dyed a fast black, the more of the extract is used and the longer the material
remains in the bath, the better will be the result.
In order to obtain different shades of black, a little blue, red, yellow, or other
coloring matter may be added at the discretion of the user.
If it is desired to dye the articles other colours such as bottle or other greens,
peacock or other blues, reds or rubies, the same compound above mentioned is used in
combination with other ingredients such as are well known to dyers for obtaining
those colours with logwood dyes.
The above described proportions are only given by way of example, and we do
therefore not limit ourselves to them.
By our above described improved process a considerable saving of labor, fuel, and
steam will be effected while at the same time the duration of the process is greatly
reduced.

page_text: Having now
particularly described and ascertained the nature of this
invention and in what manner the same is to be performed we declare that what we
claim is -
The herein described process of dyeing yarus and fabrics in a single bath by the
use of the dye stuff on coloring matter described in the specification to our appli-
cation for a patent No. 3280 of 1887, by dissolving the said dye in a bath of acidulated
water and then treating the yarn or fabric therein, substantially as herein set
forth.
Dated this 10th ...
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