AN IMPROVEMENT IN THE MANU- FACTURE OF SOFT SOAP
Year: 1859

page_text: LETTERS PATENT to André Prosper Rochette, of Brighouse, in the
County of York, for the Invention of "AN IMPROVEMENT IN THE MANU-
FACTURE OF SOFT SOAP."
Sealed the 11th November 1859, and dated the 12th May 1859.
PROVISIONAL SPECIFICATION left by the said André Prosper Rochette
at the Office of the Commissioners of Patents, with his Petition, on
the 12th May 1859.
I, ANDRÉ PROSPER ROCHETTE, of Brighouse, in the County of York, do
hereby declare the nature of the Invention for "AN IMPROVEMENT IN
MANUFACTURE OF SOFT SOAP," to be as follows:-
This Invention has for its object an improvement in the manufacture of
soft soap, and consists in applying the oleic acid obtained when distilling fatty
and oily matters in combination with caustic potash and water. The com-
bination of these matters 1 believe to be best accomplished cold; but heat
may be applied in the process. If it be desired to give to the soap the
scent, color, or character of any oil, then a small per-centage of such oil.
is added..

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said André Prosper Rochette in the Great Seal Patent Office on
the 11th November 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ANDRÉ
PROSPER ROCHETTE, of Brighouse, in the County of York, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twelfth day of May, in the year of our Lord
One thousand eight hundred and fifty-nine, in the twenty-second year
of Her reign, did, for Herself, Her heirs and successors, give and grant
unto me, the said André Prosper Rochette, Her special licence that I, the
said André Prosper Rochette, my executors, administrators, and assigns, or
such others as I, the said André Prosper Rochette, my executors, adminis-
trators, 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 "AN IMPROVEMENT IN THE MANUFACTURE OF SOFT SOAP," upon the
condition (amongst others) that I, the said André Prosper Rochette, my
executors or administrators, by an instrument in writing under my, or their,
or one of their hands and seals, 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 I, the said André Prosper Rochette, do hereby
declare the nature of the 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 :-
This Invention has for its object an improvement in the manufacture of
soft soap, and consists in applying the oleic acid obtained when distilling fatty
and oily matters in combination with caustic potash and water.
The com-
bination of these matters I believe to be best accomplished cold; but heat
may be applied in the process. If it be desired to give to the soap the
scent, color, or character of any oil, then a small per-centage of such oil
is added.
Having thus stated the nature of my Invention, I will proceed more fully
to describe the manner of performing the same.
The best preparation I believe will be found to consist of one measure of

page_text: water, containing at the rate of eighteen and a half per cent. of caustic potash
to one measure of the oleic acid resulting from the distillation of fatty or oily
matters; these are to be intimately mixed, and, by preference, when cold, and
if oil is to be added, say, not less than about three per cent. of such oil. I
do not confine myself to the proportions of water and alkali, as the same may
be varied, and it may in some cases be found desirable to vary the proportions
to suit particular samples of oleic acid obtained when distilling fatty and oily
substances.
In witness whereof, I, the said André Prosper Rochette, have hereunto
set my hand and seal, this Ninth day of November, in the year of
our Lord One thousand eight hundred and fifty-nine.
ANDRE PROSPER ROCHETTE. (L.S.)