IMPROVEMENTS IN THE MANUFACTURE OF BLUE AND VIOLET COLORING MATTERS SUITABLE FOR DYEING AND PRINTING
Year: 1863

page_text: LETTERS PATENT to Alcide Poirrier, of Paris, and Charles Chappat, fils,
of Paris, Manufacturers, for the Invention of "IMPROVEMENTS IN THE
MANUFACTURE OF BLUE AND VIOLET COLORING MATTERS SUITABLE FOR DYEING AND
PRINTING."
Sealed the 2nd October 1863, and dated the 25th April 1868.
PROVISIONAL SPECIFICATION left by the said Alcide Poirrier and Charles
Chappat at the Office of the Commissioners of Patents, with their Petition.
on the 25th April 1863.
We, ALCIDE POIRBIER, of Paris, and CHARLES CHAPPAT, fils, of Paris, Manu-
facturers, do hereby declare the nature of the Invention for "IMPROVEMENTS IN
THE MANUFACTURE OF BLUE AND VIOLET COLORING MATTERS SUITABLE FOR DYEING
AND PRINTING," to be as follows:-
This Invention has for its object improvements in the manufacture of blue and
violet coloring matters suitable for dyeing and printing. For these purposes we
take aniline red dyes, known commercially as "fuchsine," " roseine," " magenta,"
and by other names, and chemically as different salts of rosaniline, and these
red dyes we treat with napthylamine a substance derived from napthaline in
the same manner as aniline is derived from benzine. We mix together the
aniline red and the napthylamine and heat the mixture. The proportions
which up to the present time we have found to be the most suitable are one part
of auiline red and three parts of napthylamine. When working with some

page_text: descriptions of aniline red we find that the reaction is facilitated by adding to
the mixture above mentioned a small quantity of benzoic acid; there aro also
other substances which act similarly to assist the reaction. We would remark
that by "aniline red dyes," and by "rosaniline," we mean not only the red
dyes and rosaniline prepared from aniline itself, but also those which may be
prepared from substances very similar to aniline, and which are known as the
homologues of aniline, as toluidine, cumidine, and others.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Alcide Poirrier and Charles Chappat in the Great Seal
Patent Office on the 24th October, 1863.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, ALCIDE
POIRRIER, of Paris, and CHARLES CHAPPAT, fils, of Paris, Manufacturers, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-fifth day of April, in the year of our Lord
One thousand eight hundred and sixty-three, in the twenty-sixth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us,
the said Alcide Poirrier and Charles Chappat, Her special licence that we, the
said Alcide Poirrier and Charles Chappat, our executors, administrators, and
assigns, or such others as we, the said Alcide Poirrier and Charles Chappat,
our executors, administrators, and assigns, should 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 "IMPROVEMENTS IN THE MANU-
FACTURE OF BLUE AND VIOLET COLORING MATTERS, SUITABLE FOR DYEING AND
PAINTING," upon the condition (amongst others) that we, the said Alcide
Poirrier and Charles Chappat, our executors or administrators, by an instru-
ment in writing under our or their hands and seals, or under the hand and
and seal of one of us or them, 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 of the said
Letters Patent.
NOW KNOW YE, that we, the said Alcide Poirrier and Charles Chappat
do hereby declare the nature of the said Invention, and in what manner the

page_text: same is to be performed, to be particularly described and ascertained in and by
the following statement thereof, that is to say :-
This Invention has for its object improvements in the manufacture of blue
and violet coloring matters suitable for dyeing and printing. For this purpose
we take the aniline reds known in commerce under the names of "fuchsine,"
"roseine," " magenta," and under other names, and chemically as being different
salts of rosaniline, and we treat these red colors with napthylamine, a substance
which is derived from napthaline, as aniline is derived from benzine. The
proportions of these substances which we employ as being the most suitable are
the following:-To 100 parts of aniline red we add from 400 to 500 parts of
napthylamine, except when certain special salts of rosaniline (such as the acetate)
are taken, it is necessary in order to obtain a good solution of the red in the
napthylamine (melted in an oil bath as herein-after stated) and so that a good
result may follow to add to the above-mentioned mixture a proportion of benzoic
acid (from 20 to 30 parts) or better still of an alkaline or metallic acetate (from
50 to 100 parts) such as the acetate of alumina, lime, or soda. The materials
are heated in an oil bath for a sufficient time, say four or five hours, and some-
times more, at a temperature between 150 and 155 degrees centigrade; with a
lower temperaturo the coloring matters formed give shades of less purity. It
is important to take care during the operation that the mixture of the matters
shall be complete.
When the matters in the retort appear of the shade desired the purification
of the coloring matter is proceeded with in the usual manner of purifying
aniline dyes with diluted sulphuric acid, hydrochloric acid, &c., and is finished
by washing in pure water, so as to leave the color quite pure and ready for
drying.
In witness whereof, we, the said Alcide Poirrier and Charles Chappat
have hereunto set our hands and seals, this Twentieth day of October
in the year of our Lord One thousand eight hundred and sixty-
throo
A. POIRRIER. (L.S.)
C. CHAPPAT. (L.S.)