IMPROVEMENTS IN THE MODE OF PRODUCING CERTAIN COLORS ON COTTON, LINEN, AND OTHER TEXTILE FABRICS
Year: 1870

page_text: LETTERS PATENT to Ludwig Hamel, of the City of Manchester, in
the County of Lancaster, Calico Printer, for the Invention of
"IMPROVEMENTS IN THE MODE OF PRODUCING CERTAIN COLORS ON COTTON,
LINEN, AND OTHER TEXTILE FABRICS."
Sealed the 20th December 1870, and dated the 22nd June 1870:
PROVISIONAL SPECIFICATION left by the said Ludwig Hamel at
the Office of the Commissioners of Patents, with his Petition, on
the 22nd June 1870.
I, LUDWIG HAMEL, of the City of Manchester, in the County of
Lancaster, Calico Printer, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN THE MODE OF PRODUCING CERTAIN COLORS ON
COTTON, LINEN, AND OTHER TEXTILE FABRICS," to be as follows:-
I
pass the cloth through a solution of aniline salt in the proportion of
from one ounce to sixteen ounces per gallon of water according to the
weight of the cloth and the strength of shade required. Dry the cloth,
then print on the pattern in the various colors required, afterwards age for
two or more days, then dye in indigo in the proportion of from two
drams to two ounces of indigo to the pound of cloth, according to the
pattern and the depth of shade required.

page_text: By this method patterns in white, blue, green, orange, yellow, red,
lilac, and black, on a blue ground are produced much cheaper than
heretofore.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Ludwig Hamel in the Great Seal Patent
Office on the 21st December 1870.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, LUDWIG
HAMEL, of the City of Manchester, in the County of Lancaster, Calico
Printer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-second day of June, in the year
of our Lord One thousand eight hundred and seventy, in the thirty-
fourth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Ludwig Hamel, Her special license, that
I, the said Ludwig Hamel, my executors, administrators, and assigns,
or such others as I, the said Ludwig Hamel, 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 THE MODE OF PRODUCING CERTAIN COLORS ON COTTON, LINEN, AND OTHER
TEXTILE FABRICS," upon the condition (amongst others) that I, the said
Ludwig Hamel, 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 Ludwig Hamel, do hereby
declare the nature of my 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 :-
-
This Invention has for its object an improvement in the present
expensive mode of indigo dyeing, and for this purpose I pass the cloth

page_text: through a solution of aniline salt, chlorate of potash, and water in about
the proportions of one to sixteen ounces of aniline salt, and one-eighth of
an ounce to four ounces chlorate of potash, to one gallon of water,
according to the weight of the cloth and the depth of shade required.
The cloth is then dried and the various colors required printed on in the
usual manner, and is afterwards aged for two or more days in a room at
about 80° F., then dyed in indigo in about the proportion of from two
drachms to two ounces of indigo to the pound of cloth, according to the
pattern and the depth of shade required and quality of indigo used. By this
method patterns in white, blue, green, orange, yellow, red, and black,
on a blue ground, are produced much cheaper than heretofore. The
paste or pulp used for printing the various designs or colors is made in
the usual way, but I have found by experience that a little resin paste,
dissolved in the color mixture has a great tendency to resist the action
of the aniline salt on the cloth.
Having now described the nature and particulars of my said Invention
and the manner in which the same is to be performed, I desire it to be
understood that I claim as my Invention the production of patterns in
white, blue, green, orange, yellow, red, and black, either separately or
in combination on a blue ground, by first padding the cloth in a salt
of aniline and afterwards dyeing in indigo as herein described, or any
mere modification thereof.
In witness whereof, I, the said Ludwig Hamel, have hereunto
set my hand and seal, this Eighth day of December, in the year
of our Lord One thousand eight hundred and seventy.
Witnesses,
HARRY M. LAZARUS,
Victoria Park,
Manchester.
HERMANN HILDESHEIN,
Ashfield,
Victoria Park,
Manchester.
L. HAMEL.
(L.S.)