THE PREPARATION AND USE OF NEW SUBSTANCES FOR DYEING, PRINTING, AND TANNING, ALSO APPLICABLE FOR THE MANUFACTURE OF PAPER AND THREADS OR YARNS
Year: 1872

page_text: LETTERS PATENT to Paul Philippe François Michcá, of Jubbulpore,
Central Provinces, East India, but at present of Nos. 17 and 18,
Leadenhall Street, in the City of London, for the Invention of
"THE PREPARATION AND USE OF NEW SUBSTANCES FOR DYEING, PRINTING,
AND TANNING, ALSO APPLICABLE FOR THE MANUFACTURE OF PAPER AND
THREADS OR YARNS."
""
Sealed the 24th January 1873, 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 greeting.
WHEREAS I am in possession of an Invention for "THE PRE-
PARATION AND USE OF NEW SUBSTANCES FOR DYEING, PRINTING, and Tanning,

page_text: ALSO APPLICABLE FOR THE MANUFACTURE OF PAPER AND THREADS OR YARNS," and
have petitioned Her most Excellent Majesty 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
first and true 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 in the employment of the barks of certain
trees to be found principally in East India, called the "butca frondosa"
and the "butea gibsonis," for the purposes of dyeing, printing, and
tanning, and also for the manufacture of paper, and for spinning into
threads or yarns. The said barks contain a large per-centage of tannin
or tannic acid and other extractive matter, which is separated from the
bark by treatment in water (more readily in hot than in cold water) ;
the decoction thus obtained can either be employed directly, or in order
to render it portable and to preserve it for use in a compact form it can
be evaporated at a temperature below 212° Fahr., either to a thick
syrupy state or by further evaporation to a dry state, and compressed
into solid blocks.
Dycing and Printing.-The decoction obtained as above described, or
a solution of the condensed extract, is used in the usual way for dyeing
a fast brownish red colour. With the salts of iron it will produce a
fast blue-black colour well suited for dyeing wool, silk, or cotton. For
calico printing the same decoction thickened by evaporation at a low
temperature to the required consistency will readily print a redish
colour, which is modified by the use of the various salts and mordants
usually employed, and with the addition of salts of iron it will readily
print a fast blue-black colour.
Tanning. The tannic acid contained in the above-named barks will
combine with the albumen of skins or hides to produce leather. The
solution being of a red colour these new substances are well adapted to
the use of morocco and fancy leather manufacturers.
Paper Pulp, Threads, or Yarns.-The above-named barks contain a
large per-centage of fibre, which is separated from the non-fibrous parts
of the bark by any ordinary scutching process; and after boiling,
washing, and if necessary bleaching, it is then readily applicable either

page_text: for making paper pulp or for spinning into threads or yarns of a coarse
quality, either by itself or in conjunction with other materials.
Having thus described the nature of my Invention, and in what
manner the same is to be performed, what I claim is,—
First. The use of the barks of the "butea frondosa" and the "butea
gibsonis," or of a decoction thereof, for dyeing, printing, and tanning.
Second. The use of the said barks for the manufacture of paper and
threads or yarns.
Third. The process, substantially as herein described, of producing
from the barks of buta frondosa and butea gibsonis a syrupy or solid
extract for use in dyeing, printing, and tanning.
In witness whereof, I, the said Paul Philippe Francois Micheá,
havo hereunto set my hand and seal, this Eighteenth day of
September, in the year, of our Lord One thousand eight hundred
and seventy-two.