AN IMPROVEMENT IN DYEING AND FIXING OF WHAT ARE KNOWN AS ANILINE COLORS
Year: 1873

page_text: LETTERS PATENT to Edward Hunt, Professional Chemist, of Worsley
Stret, Salford, in the County of Lancashire, for the Invention of
"AN IMPROVEMENT IN DYEING AND FIXING OF WHAT ARE KNOWN AS ANILINE
COLORS."
Sealed the 27th May 1878, and dated the 3rd March 1878,
PROVISIONAL SPECIFICATION left by the said Edward Hunt at the
Office of the Commissioners of Patents, with his Petition, on the
Brd March 1878.
I, EDWARD HUNT, Professional Chemist, of Worsley Street, Salford,
in the County of Lancashire, do hereby declare the nature of the said
Invention for "AF IMPROVEMENT IN DYEING AND FIXING OF WHAT ARE KNOWN
AS ANILINE COLORS," to be as follows :—
My improvement consists in dyeing and fixing aniline colors upon
cotton and linen yarns and fabrics with a mordant composed of an
aluminous salt combined with gelatine and tannin.
I insure what is termed the fixation of the dye by drying in the yarn
or fabric an aqueous solution of gelatine with a salt of alumina such as

page_text: the subsulphate dissolved in acetic acid, which is a preparation known
as acetate of alumina, and then ageing or steaming and rinsing in hot
water and passing into a solution of tannin and dyeing.
The fabric can be dyed even though the ageing or steaming processes
are omitted, but not in so beneficial a way.
-
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Edward Hunt in the Great Seal Patent Office on
the 2nd September 1873.
TO ALL TO WHOM THESE PREȘENTS SHALL COME, I, ¿EDWARD
HUNT, Professional Chemist, of Worsley Street, Salford, in the County 1
of Lancashire, send greeting.
·
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Third day of March, in the year
of our Lord One thousand eight hundred and seventy-three, in the
thirty-sixth year of Her reign, did, for Herself, Her heirs and suc- 1
cessors, give and grant unto me, the said Edward Hunt, Her special
license that I, the said Edward Hunt, my executors, administrators,
and assigns, or such others as I, the said Edward Hunt, my executors,
administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereaftor during the term i
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 “AN IMPROVEMENT
IN DYEING AND FIXING OF WHAT ARE KNOWN AS ANILINE COLORS," upon the
condition (amongst others) that I, the said Edward Hunt, 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 1
of the said Letters Patent.
"
NOW KNOW YE, that I, the said Edward Hunt, do hereby declare
the nature of the said Invention, and in what manner the same is to be

page_text: Acetato of alumina may as is well known to chemists be produced in
other ways besides the one described.
Besides the acetate of alumina, various other salts of alumina may
be employed to furnish the supply of alumina necessary (although not
with the same advantage) care being taken to render these, when very 5
acid, sufficiently neutral, so that when dried with gelatine on the
material to be dyed, the alumina shall form a compound insoluble, or
soluble with difficulty in boiling water. Thus the alums and sulphate of
alumina, with such an addition of alkali as just stops short of making
a permanent precipitate of alumina, or with the addition of the acetate of 1
soda will supply sufficient alumina to gelatine to form a compound
but slightly soluble in boiling water.
I do not confine myself to the exact proportions of alumina and
gelatine given; and the proportion of water to bo added, and of tannin
employed, is determined by the depth of shade required in the dye to be 1
produced; but I claim as my improvement in dyeing and fixing of what
are known as aniline colors upon cotton and linen yarns and fabrics, the
use of a mordant composed of an aluminous salt combined with gelatine
and tannin, substantially as described.
In witness whereof, I, the said Edward Hunt, have hereunto set 2
my hand and seal, this Thirtieth day of August, in the year
of our Lord One thousand eight hundred and seventy-three.
EDWARD HUNT.” (L.S.)
"