Improvements in Resists or Discharges for Use in Printing or Dyeing Cotton, Wool, and other Fabrics.
Year: 1893

page_text: Date of Application, 11th Apr., 1893
Complete Specification Left, 12th Dec., 1893-Accepted, 27th Jan., 1894
PROVISIONAL SPECIFICATION.
Improvements in Resists or Discharges for Use in Printing or Dyeing
Cotton, Wool, and other Fabrics.
I WILLIAM THOMAS WHITEHEAD of the Dominion Cotton Company, Magog
Branch, Magog, in the Province of Quebec, Canada, Manager, do hereby declare
the nature of this invention to be as follows:-
:-
I have discovered that cloth may be produced having a pattern or figure
contrasting in shade or color with the ground color, by printing the pattern or
figure in a resist-mordant containing zinc as the essential element and thereafter
dyeing the cloth a plain color.
Cotton, wool, or silk fabric prepared for printing as usual has the pattern or
figure printed thereon in a resist mordant containing zinc as the essential element,
mixed with a proper thickener, and with or without the admixture of a color.
If the resist-mordant is used without the addition of a color, and the cloth is
dyed a plain color, the pattern or figure displayed thereon will be the same in color
but of a lighter shade than the ground.
If a color is used with the resist-mordant the pattern or figure will appear
darker in shade than the ground.
The pattern or figure may be produced in one color and the ground in another
by using one color with the resist-mordant for printing and another color for the
dyeing.
The dyeing may be performed in any usual or desired manner.
Did she
1
CA
+1 1000
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Resists or Discharges for Use in Printing or Dyeing
Cotton, Wool, and other Fabrics.
I, WILLIAM THOMAS WHITEHEAD of the Dominion Cotton Company, Magog
Branch, Magog, in the Province of Quebec, Canada, 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 :-
I have discovered that cloth may be produced having a pattern or figure thereon
of a shade contrasting with the ground, the pattern or figure being either of the
same color as the ground color or of a different color, by printing the pattern or
figure in a resist-mordant containing zinc as the essential element, and thereafter
dyeing the cloth in a plain color.
In practising my invention I take cotton, wool or silk fabric prepared for
printing in any usual way, and print thereon the desired pattern or figure in a
resist-mordant particularly described hereinafter, then dry in the usual way and
steam if required.
The cloth is then dyed a plain color in a jig, dye beck, padding machine, or in
any well-known way, and thereafter developed and finished as usual,

page_text: When so treated the cloth will present a plain colored ground with the pattern
or figure displayed thereon in the same color, but of a shade contrasting with the
ground.
I use a resist mordant containing zinc as the essential or active element thereof,
and print the pattern or figure in such a resist-mordant, mixed with a proper
thickener, thereafter dyeing the fabric a plain color and finishing.
The zinc in the mixture will act to mordant a portion of the plain color on the
parts of the fabric covered by the resist-mordant, at the same time resisting some
of the color on such portions, and the result is the figured effect in two different
shades of the same color, the pattern or figure in this instance being lighter than
the ground work.
If the pattern or figure is to appear in a shade darker than the ground, that
particular color will be mixed with the resist-mordant preparatory to printing
therewith, and after printing the cloth is plain dyed the same color.
In this instance the zinc appears to act as a mordant for the color carried by the
mixture, fixing it in the cloth in the desired pattern, while it also acts to resist a
portion of the plain color in the subsequent dyeing.
The resist-mordant mixture is prepared by taking about six pounds, more or less,
of a zinc compound, such as oxide, hydrate or carbonate of zinc, to supply the zinc,
which is the essential or active element, or a like quantity of metallic zinc in
a finely divided state, and mix it with one-half a gallon of water, to which is added
one gallon of starch paste (one and one-half pounds per gallon) and one half gallon
of albumen solution (six pounds per gallon) or any other usual thickening
preparation, such as gum tragacanth or gum arabic.
These ingredients are thoroughly mixed, and the cloth is printed therewith as
described.
For general use I have found the oxide of zinc preferable, but I do not restrict
myself to its use, nor yet to the hydrate or carbonate of zinc, nor to the stated
quantity of zinc, in metallic form or as a compound, as all give good results.
By mixing a coal tar, extract or pigment color with the foregoing mixture in the
proper proportion and quantity, which varies according to the depth of shade
desired, the character of the pattern, particular nature of the color itself,
and the like, the pattern or figure will be of a darker shade than the ground.
Very beautiful effects may be produced by making the color in the resist-mordant
and the color of the ground different, in which case the finished cloth will have the
pattern or figure in one color and the ground in another, and pattern and ground
may or may not contrast in shade as desired.
The proportions of the described mixture may be varied according to circum-
stances, and yet remain within the scope of my invention.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what. I
claim is :-
1. The process of producing cloth having a pattern or figure thereon of a shade
contrasting with the ground color, which consists in printing the pattern or figure
on the cloth in a resist mordant containing zinc or a zinc compound as the essential
or active element, and thereafter dyeing the cloth a plain color, substantially as
described.
2. The process of producing cloth having a pattern or figure thereon of a shade
darker than the ground color, which consists in printing the pattern or figure on the
cloth in a resist mordant containing zinc, or a zinc compound as the essential or
active element, and a color, and thereafter plain dyeing the cloth in the same color
substantially as described.
3. The process of producing cloth having a pattern or figure thereon of a color
contrasting with the ground which consists in printing the pattern or figure on the

page_text: cloth in a resist-mordant containing zinc or a zinc compound as the essential or
active element, and a color, and thereafter dyeing the cloth in a plain contrasting
color, substantially as described.
Dated the 12th day of December 1893.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.