Improvements in Marking Cotton Goods.
Year: 1889

page_text: Date of Application, 5th Nov., 1889
Complete Specification Left, 1st Aug., 1890-Accepted, 13th Sept., 1890
PROVISIONAL SPECIFICATION.
Improvements in Marking Cotton Goods.
We, ELRIC BIRCH, of Princess Street, Manchester, Merchant, and WILLIAM
THOMSON of the Royal Institution Laboratory, Manchester, Chemist, do hereby
declare the nature of this invention to be as follows:-
The improvements relate to the marking of cotton goods which are or may be
required to be indigo dyed with names, trade marks, numbers, or other marks; and
have for object the preparation of the cotton goods, in such manner that the desired
marks are developed in the act of dyeing the same with indigo dye, in foreign
countries.
As much of the cloth shipped from England is employed by the natives for dyeing
with indigo and the stamps or "chops" at present are for the most part obliterated
by the dye in the dyeing process, it is found to be desirable that cotton goods should
retain the mark of origin upon them, either as trade or other marks, after such goods'
have been exported abroad and have been indigo-dyed.
To accomplish this, and to effect our improvements, we stamp the cotton goods
with a substance or with substances which have a resistant or oxidizing or destroying
action to indigo, so that when the goods are dyed abroad the stamped portion will
remain free of dye and there may thus be developed the mark in white, or at least in
a different or lighter colour than the body of the cloth.
By preference, for this purpose, we employ per-oxide of lead, mixed with albumen,
and it may be with china clay; but other substances capable of resisting indigo to a
lesser or greater extent may be employed.
Variations in detail, such as the nature and manner of stamping the goods, and
the particular substance or mixture of substances employed, may be made without
departing from the peculiar character of the invention, which mainly consists of
stamping the marks of cotton goods which have ultimately to be dyed with indigo,
with per-oxide of lead, or compounds therewith, or with similar substances, which will
enable the stamped portions to resist the action of indigo when such goods como to
be dyed, and thus develope the required mark in the process of dyeing.
Dated this 2nd day of November 1889.
WILLIAM GADD, C.E..
64, Barton Arcade, Manchester, Agent.
COMPLETE SPECIFICATION.
Improvements in Marking Cotton Goods,
We ELRIC BIRCH of Princess Street, Manchester, Merchant, and WILLIAM
THOMSON of the Royal Institution Laboratory, Manchester, 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:
The improvements relate to the marking of cotton goods which are or may be
required to be indigo dyed with names, trade marks, numbers, or other marks; and
have for object the preparation of the cotton goods, in such manner that the
desired marks are developed in the act of dyeing the same with indigo dye, in foreign
countries.
32
As much of the cloth shipped from England is employed by the natives for dyeing
with indigo and the "stamps ог "chops" at present are for the most part obliterated
by the dye in the dyeing process, it is found to be desirable that cotton goods should

page_text: retain the mark of origin upon them, either as trade or other marks, after such goods
have been exported abroad and have been indigo-dyed.
To accomplish this, and to effect our improvements, we stamp the cotton goods with
a substance or with substances which have a resistant or oxidizing or destroying
action to indigo, so that when the goods are dyed abroad the stamped portion will
remain free of dye and there may thus be developed the mark in white, or at least
in a different or lighter colour than the body of the cloth.
By preference. for this purpose, we employ per-oxide of lead, mixed with albumen,
and it may be with china clay; but other substances capable of resisting indigo to a
lesser or greater extent; such as parafine wax, of proper consistency; or india rubber,
which may be dissolved in alcohol, naptha or benzole; or other like substances which
are firmly adhesive and practically insoluble in water, may be employed.
Variations in detail, such as the nature and manner of stamping the goods, and the
particular substance or mixture of substances employed, may be made without
departing from the peculiar character of the invention, which mainly consists of
stamping the marks of cotton goods which have ultimately to be dyed with indigo,
with per-oxide of lead or compounds therewith, or with similarly acting substances
as hereinbefore indicated which will enable the stamped portions to resist the action
of indigo when such goods come to be dyed, and thus develope the required mark in
the process of dyeing.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
The stamping of cotton goods which have ultimately to be dyed with indigo dye
with marks, by means of a preparation of the nature herein before indicated which
has a resistant action upon indigo for the purpose and in manner substantially as
herein described.
Dated this 31st day of July 1890.
WILLIAM GADD, C.E.,
64, Barton Arcade, Manchester.