IMPROVEMENTS IN THE PREPARATION OF CERTAIN COLORING MATERIALS
Year: 1854

page_text: LETTERS PATENT to Thomas Frederick Henley, of Brompton, in the
County of Middlesex, Merchant, for the Invention of "IMPROVEMENTS IN
THE PREPARATION OF CERTAIN COLORING MATERIALS."
COMPLETE SPECIFICATION filed by the said Thomas Frederick Henley
at the Office of the Commissioners of Patents, with his Petition and
Declaration, on the 11th July 1854, pursuant to the 9th section of the
Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
FREDERICK HENLEY,. of Brompton, in the County of Middlesex, Merchant, do
hereby declare the nature of my. Invention for "IMPROVEMENTS IN THE PRE-
PARATION OF CERTAIN COLORING MATERIALS," and the manner in which the same
is to be performed, are particularly described and ascertained in and by the
following statement thereof, that is to say:-
The raw materials which I employ are stick lac, or other varieties of lac,
and the smaller branches, twigs, and leaves of the tectona grandis, or teak, or
saugun tree, which materials may be obtained in British India.
I prepare a red coloring material from the lac by treating it in a pulverized
stato with an aqueous solution of ammonia, the strength of which may be
varied, but I prefer employing a solution of the specific gravity 0.988 (water
being 1000); the coloring matter is by this means extracted from the materials
in question. The solution of the coloring matter is drawn off or separated
from the undissolved matter, and the solution is then heated or distilled, so as
to drive off all or the greater part of the ammonia, leaving the coloring matter

page_text: in solution in the water. This aqueous solution, either with or without tho
ammonia, may then be used for dyeing, with solutions of tin or other mordants;
or it may be evaporated to dryness, and the dry coloring material may be
re-dissolved when required for use.
I place the smaller branches, twigs, or leaves of the tectona grandis, or teak,
or saugun tree, in a dyeing copper or other vessel, and add water to them and
apply heat, so as to extract or form a solution of the coloring matter. This
solution is employed in dyeing or printing with mordants in the ordinary
Thus a drab or olive color is obtained with a mordant of acetate of
iron; and a fawn color is obtained with a mordant of, alumina, and various
other colors and shades of colors may be obtained with mixtures of these
or other mordants, and by using other dyeing materials in combination
with it.
Various shades of color may be obtained by employing this coloring material
in combination with that obtained from lac, as herein-before described.
The solution of the coloring material of the tectona grandis may be
evaporated, so as to form a fluid extract, or to dryness, so as to obtain it in a
solid state, and it may be again dissolved when required for use.
Having now described the nature of the said Invention, and in what
manner the same is to be performed, I wish it to be understood that what
I claim is,
Firstly, the preparation of a coloring material from stick lac, or other
varieties of lac, by means of a solution of ammonia, as herein-before
described.
Secondly, the preparation of a coloring material from the smaller branches,
twigs, and leaves of the tectona grandis, or teak, or saugun tree, as herein-
before described.
In witness whereof, I, the said Thomas Frederick Henley, havo hereunto
set my hand and seal, this Eleventh day of July, in the year of
. our Lord One thousand eight hundred and fifty-four.
Witness,
CHARLES COWPER,
20, Southampton Buildings,
Chancery Lane.
T. F. HENLEY. (L.S.)