Im- PROVEMENTS IN DYEING AND PRINTING
Year: 1864

page_text: LETTERS PATENT to Edward Joseph Hughes, of the City of Manchester,
in the County of Lancaster, Patent Agent, for the Invention of "Im-
PROVEMENTS IN DYEING AND PRINTING."-A communication from abroad by
PROVISIONAL SPECIFICATION left by the said Edward Joseph Hughes
at the Office of the Commissioners of Patents, with his Petition, on the
7th June 1864.
I, EDWARD JOSEPH HUGHES, of the City of Manchester, in the County of
Lancaster, Patent Agent, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN DYEING AND PRINTING," being a communication to me
from abroad by Charles Lauth, of Paris, in the Empire of France, to be as
follows:-
This Invention consists in the production of a black color on cotton or linen
cloth or yarns, and I produce such black color by the admixture of a salt of
aniline with chlorate of potash and sulphuret or sulphide of copper, or sulphuret
or sulphide of iron, or mixtures of the same, the proportions being about sixteen
ounces salt of aniline, four ounces sulphide of copper, and four ounces chlorate
of potash to one gallon of water. I am aware that a black has before been pro-
duced by the admixture of a salt of aniline with soluble salts of copper, but the
use of such soluble salts of copper has been found attended with such difficulties
as to render it almost useless. These difficulties are entirely overcome by the

page_text: use of sulphide of copper or iron with the salt of aniline and chlorate of potash
in about the proportions already described when the black is required to be
printed. When I dye black by this process I first precipitate in the cloth or
yarn the sulphide of copper or iron and subsequently pass through a solution of
a salt of aniline and chlorate of potash. The cloth or yarn is afterwards dyed
and washed when the black color is produced.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Edward Joseph Hughes in the Great Seal Patent Office
on the 6th December 1864.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDWARD
JOSEPH HUGHES, of the City of Manchester, in the County of Lancaster, Patent
Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Seventh day of June, in the year of our Lord One
thousand eight hundred and sixty-four, in the twenty-seventh year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Edward Joseph Hughes, Her special license that I, the said
Edward Joseph Hughes, my executors, administrators, and assigns, or such
others as I, the said Edward Joseph Hughes, my executors, administrators,
and assigns, should at any time agree with, and no others, from time to
time and at all times thereafter during the term therein expressed, should
and lawfully might make, use, exercise, and vend, within the United
Kingdom of Great Britain and Ireland, the Channel Islands, and Isle of
Man, an Invention for "IMPROVEMENTS IN DYEING AND PRINTING," being a
communication to me from abroad by Charles Lauth, of Paris, in the Empire
of France, upon the condition (amongst others) that I, the said Edward
Joseph Hughes, my executors or administrators, by an instrument in writing
under my, or their, or one of their hands and seals, should particularly
describe and ascertain the nature of the said Invention, and in what manner
the same was to be performed, and cause the same to be filed in the Great
Seal Patent Office within six calendar months next and immediately after
the date of the said Letters Patent.
NOW KNOW YE, that I, the said Edward Joseph Hughes, do hereby
declare the nature of the said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement (that is to say) :-

page_text: This Invention consists in the production of a black color on cotton or linen
cloth or yarns, and I produce such black color by the admixture of a salt of
aniline with chlorate of potash and sulphuret or sulphide of copper or sulphuret
or sulphide of iron, or mixtures of the same, the proportions to be about sixteen
ounces salt of aniline, four ounces sulphide of copper, and four ounces chromate
of potash to one gallon of water. I am aware that a black has before been
produced by the admixture of a salt of aniline with soluble salts of copper, but
the use of such soluble salts of copper has been found to be attended with
such difficulties as to render it almost useless. These difficulties are entirely
overcome by the use of sulphide of copper or iron with the salt of aniline and
chlorate of potash in about the proportions already described when the black
is required to be printed. When I dye black by this process I first precipi-
tate in the cloth or yarn the sulphide of copper or iron and subsequently pass
through a solution of a salt of aniline and chlorate of potash. The cloth or
yarn is afterwards aged and washed when the black color is produced.
In witness whereof, I, the said Edward Joseph Hughes, have hereunto
set my hand and seal, this Fifth day of December, in the year
of our Lord One thousand eight hundred and sixty-four.
E. J. HUGHES. (L.S.)