NEW SUBSTANCES FOR DYEING, PRINTING, AND TANNING, AND THE PROCESS EMPLOYED FOR TREATING ONE OF SUCH SUBSTANCES
Year: 1872

page_text: LETTERS PATENT to Paul Philippe François Micheń, of Jubbulpore,
Central Provinces, Fast India, but at present of Nos. 17 and 18,
Leadenhall Street, in the City of London, for the Invention of
"NEW SUBSTANCES FOR DYEING, PRINTING, AND TANNING, AND THE PROCESS
EMPLOYED FOR TREATING ONE OF SUCH SUBSTANCES."
Sealed the 15th November 1872, and dated the 20th September 1872.
COMPLETE SPECIFICATION filed by the said Paul Philippe François
Micheá at the Office of the Commissioners of Patents, with his
Petition and Declaration, on the 20th September 1872, pursuant
to the 9th Section of the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, PAUL
PHILIPPE FRANÇOIS MICHEÁ, of Jubbulpore, Central Provinces, East
India, but at present of Nos. 17 and 18, Leadenhall Street, in the City
of London, send grecting.
WHEREAS I am in possession of an Invention for "NEW SUBSTANCES
FOR DYEING, PRINTING, AND TANNING, AND THE PROCESS EMPLOYED FOR TREATING
ONE OF SUCH SUBSTANCES," and have petitioned Her most Excellent Majesty

page_text: Queen Victoria to grant unto me, my executors, administrators, and
assigns, Her Royal Letters Patent for the same, and have made solemn
Declaration that I am the true and first Inventor thereof.
NOW KNOW YE, that I, the said Paul Philippe François Micheá,
do hereby declare the nature of the said Invention to be as follows :—
My Invention consists of the employment of the leaves of certain
trees to be found principally in East India called the " canocarpus
latifolia" and the "myrobolana emblica" for the purposes of dyeing,
printing, and tanning.
Tanning. The said leaves contain tannic acid, which is obtained in
solution by the usual process of decoction, and will then combine with
the albumen of skins or hides to form leather.
Dyeing. The decoction of the leaves of the "canocarpus latifola "
or of the leaves of the myrobolana emblica I also employ for dyeing
textile fabrics of a brownish yellow colour, and with the addition of the
usual reagents or mordants used by dyers I produce a variety of hues
or tints which are principally useful to wool, silk, and cotton dyers.
Printing. By evaporating the decoction obtained from the leaves
of the myrobolana emblica to the required consistency the substance
becomes well suited for calico printing, as it can be used in a cold state
and will readily print a fast brown colour of different hues with the
addition of the various salts and mordants used with known astringents,
and with the addition of salts of iron it will readily print a fast blue-
black colour.
cano-
The addition of salts of iron to a decoction of the leaves of
carpus latifolia" or of the leaves of the "myrobolana emblica"
produces an abundant blue-black precipitate which is highly adapted
for the production of black dyes giving a fast black colour.
Furthermore, if a hot decoction of the leaves of the " canocarpus
latifolia" be evaporated to a semi-syrupy consistency and be then allowed
to cool, the liquor will become muddy on cooling, and there will be
precipitated in the bottom of the vessel a brownish powdery substance
which I term "canocarpine.”
If the supernatant syrupy liquor is decanted and mixed with cold
water a further quantity of the "canocarpine" will be precipitated, and
in carrying out this process for manufacturing purposes I repeat the

page_text: "
above process of adding cold water to the supernatant liquor until no
further precipitate is formed, and I employ the remaining liquor after
all the precipitate is extracted therefrom for producing another decoction
of the leaves.
The precipitated "canocarpine" is collected and drained, and it may
be used as a dry powder, or by preference for facility of transport I
press the same while moist in press boxes lined with cloth so as to
produce a solid mass, which is then cut up into cakes and dried on
shelves in a closed room or drying house.
The “canocarpine" produced as above described is highly soluble in
hot water, and it is applicable for dyeing in brown colours, or if treated
with salts of iron it will give a fast black colour.
The mode of employing the "canocarpine" for dyeing purposes, as
also the modes of using the decoctions of the leaves first described for
the purposes of dyeing and tanning, are the same as those employed for
dyeing and tanning with known substances and need therefore not be
further described.
Having thus described the nature of my Invention, and in what
manner the same is to be performed, what I claim is,-
canocarpus latifolia" or of
First. The use of the leaves of the "
decoctions produced therefrom for dyeing and tanning.
Second. The use of the leaves of the "myrobolana emblica
decoctions produced therefrom for dyeing, printing, and tanning.
"
"
or of
Third. The production of "canocarpine" from the leaves of the
canocarpus latifolia," and the use thereof for dyeing.
Fourth. The process substantially as herein described of producing
'canocarpine" from the leaves of the "canocarpus latifolia."
In witness whereof, I, the said Paul Philippe François Micheá, have
hereunto set my hand and seal, this Eighteenth day of Septem-
ber, in the year of our Lord One thousand eight hundred and
seventy-two.