A NEW RED COLOURING MATTER
Year: 1867

page_text: LETTERS PATENT to Théobalt Luthringer, of Lyons, in the Empire of
France, at present temporarily residing at the Hotel de France et de
Belgique, Bloomsbury Square, in the County of Middlesex, for the
PROVISIONAL SPECIFICATION left by the said Théobalt Luthringer at
the Office of the Commissioners of Patents, with his Petition, on the
6th August 1867.
I, THÉOBALT LUTHRINGER, of Lyons, in the Empire of France, at present
temporarily residing at the Hotel de France et de Belgique, Bloomsbury
Square, in the County of Middlesex, do hereby declare the nature of the
said Invention for "A NEW RED COLOURING MATTER," to be, as follows:
In order to carry out my Invention I take, first, a kilogramme (=2.20 lbs.
avoirdupois) of crystalized chlorhydrate of rosaniline or fuchsine, which I dissolve
in 1000 litres (=220 gallons) of boiling water, the whole to be mixed in a
large wooden vat; I stir the liquid for a quarter of an hour in order to
thoroughly mix the solution of fuchsine; I filter the hot solution through
fine cloth; I let the beat of the liquid fall until a thermometer plunged
therein shows 45 degrees (centigrade) above zero. Secondly, I take 4
kilogrammes and 500 grammes (=10 lbs.) of bi-oxide of baryum without
water and in-a-powdered form; this I dissolve in an earthenware or wooden,
vessel together with 35 litres (-7-7 gallons)-of-cold-water so as to form a
hydrate of this oxide with the water; I pour upon this hydrate 10 kilo-

page_text: grammes (22.04 lbs.) of sulphuric acid at 66 degrees of density by the
areometer of Beaumé; I stir this mixture well during half a minute, then I
pour upon the said mixture of sulphuric acid, water, and bi-oxide of baryum the
said 1000 litres (=220 gallons) of the solution of fuchsine at 45 degrees
above zero; I thoroughly stir the whole, and instantaneously the mixture
becomes a yellow citron colour, then after two or three minutes becomes
discoloured, preserving however a slight red tinge; I then filter the whole in
'order' to separate the sulphate of protoxide of baryum which has been formed
by the reaction I let the filtered solution get cold, and then pour it into a
'wooden vat or tinned copper boiler, and heat the liquid mass until it boils. As
the temperature gradually increases this new' red coloring matter, which I
call geranosine, is developped, the colour becomes remarkably intense, and
arrives at the height of perfection at boiling point; I let it boil for two
"minutes; I filter it and let it get cold; at this state of the process the colouring
.matter is formed and is then ready for use! In some cases I can. replace the
bi-oxide of baryum by the bi-oxide of strontium or of calcium. I can also
replace the chlorbydrate of rosaniline by either the sulphate, the arseniate or
the acetate of rosaniline,, or any other salt of rosaniline, whatever. .I, can
dissolve the fuchsine in alcohol, and pour the solution in the boiling water. I
can also replace the sulphuric acid by chlorhydric acid or acetic acid, and I
employ sulphuric acid to completely take away the baryte in the form of a
sulphate which is quite insoluble:
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Théobalt Luthringer in the Great Seal Patent Office on the
6th February 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THEOBALT
LUTHRINGER, of Lyons, in the Empire of France, at present temporarily
residing at the Hotel de France et de Belgique, Bloomsbury Square, in the
County of Middlesex, send greeting..
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixth day of August, in the year of our Lord
One thousand eight hundred and sixty-seven, in the thirty-first year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Théobalt Luthringer, Her special licence that, I,, the said Théobalt
Luthringer, my executors, administrators, and assigns, or such others as I, the
said Théobalt Luthringer, my executors, administrators, and assigns, should

page_text: :
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, "A NEW
RED COLOURING MATTER,". upon the condition (amongst others) that I, the
said Théobalt Lutbringer, niy.executors or administrators, by an instrument
in writing under my, or their, or one of their hands and seals, should par.
ticularly 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
after the date of the said Letters Patent.
next and immediately
NOW KNOW YE, that I, the said Théobalt Lüthringer, .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 thereof (that is to say):
In order to carry out my Invention I take, first, a kilogramme (=2.20 lbs.
avoirdupois) of crystallized chlorhydrate of rosanilinė or fuchsine, and dissolve it
in 1000 litres (=220 gallons) of boiling water contained in a large wooden vat';
I stir the liquid for a quarter of an hour in order to thoroughly effect the
solution of fuchsine, and then filter the hot solution through fine cloth; I let
the heat of the liquid fall, until a thermometer plunged therein shows 45
degrees (centigrade) above zero. Second, I take 4 kilogrammes and 500
grammes (=10 lbs.) of anhydrous bi-oxide of baryum in a powdered state and
lace it in an earthenware or wooden vessel containing 35 litres (=7.7 gallons)
of cold water so as to form a bydrate of this oxide with the water; I pour
upon this hydrate 10 kilogrammes (=22·04 lbs.) of sulphuric acid at 66 degrees
of density by the areometer of Beamé, and stir this mixture for half a minute,
and then pour upon the said mixture of sulphuric acid, water, and bi-oxide of
baryum the before-mentioned 1000 litres (=220 gallons) of the solution of
fuchsine at 45 degrees above zero; I thoroughly stir the whole and instan-
taneously the mixture becomes a yellow citron colour, which after two or three
minutes changes to a slight reddish tinge; I then filter the whole in order to
separate the sulphate of protoxide of baryum which has been formed by the
reaction, and let the filtered solution get cold, and then pour it into a wooden
vat or tinned copper boiler and heat the liquid mass until it boils. As the
temperature gradually increases this new red colouring matter, which I call
"géranosine," is developped, the colour becoming-remarkably intense. and
arriving at its highest state of perfection at boiling point; I let it boil-for-two-
minutes, filter it and let it get cold, and then the filtered liquid which is the

page_text: géranosine is ready for use. I can substitute for the.bi-oxide of baryum the
bi-oxide of strontium, or the bi-oxide of calcium. I can also. replace the
chlorbydrate of rosaniline either by the sulphate, the arseniate, or the acetate of
rosaniline, or any salt of rosaniline whatever. I can dissolve the fuchsine in
alcohol, and pour the solution in the boiling water. I can also replace the
sulphuric acid by hydrochloric or acetic acids, but I employ the sulphuric
acid to completely take away the baryte in the form of a sulphate which is
quite insoluble..
Having now described the nature of the said Invention, and in what manner
the same is to be performed, I claim,-
First. The production of this new colouring matter by reacting on the fuchsine
dissolved in water or diluted alcohol by oxygen contained in bi-oxide of hydrogen
or oxygenated water in co-operation with the mineral or vegetable acids and
the action of heat.
Second. The above-described process for the manufacture and preparation of
this colouring matter..
Third. Its application industry and more especially to the colouring by
dyeing or printing of textile fabrics, such as silk, wool, cotton, and thread, and
also of paper, feathers, skins, and other materials.
.
In witness whereof, I, the said Théobalt Luthringer, have hereunto
set my hand and seal, this Tenth day of January, in the year of our
Lord One thousand eight hundred and sixty-eight.
Witness,
JH. HENNING.
T. LUTHRINGER. (L.S.)