IMPROVEMENTS IN TREATING LINSEED, POPPY, AND OTHER OILS EMPLOYED IN THE MIXING OF PAINT
Year: 1855

page_text: LETTERS PATENT to Pierre Gontier, of Paris, France, Chemist, for the
Invention of "IMPROVEMENTS IN TREATING LINSEED, POPPY, AND OTHER OILS
EMPLOYED IN THE MIXING OF PAINT."
Sealed the 1st February 1856, and dated the 20th August 1855.
PROVISIONAL SPECIFICATION left by the said Pierre Gontier at the
Office of the Commissioners of Patents, with his Petition, on the 20th
August 1855.
I, PIERRE GONTIER, of Paris, France, Chemist, do hereby declare the nature
of the said Invention for "IMPROVEMENTS IN TREATING LINSEED, POPPY, AND
OTHER OILS EMPLOYED IN THE MIXING OF PAINT," to be as follows:-
My Invention consists in adding to these oils over the fire, or when slightly
heated, sulphuric acid, resin, and manganese or litharge, in proportions and
quantities to be fully described in my final Specification. Oils after having
been treated with the above materials enable the colors with which they are
mixed to cover in two coatings what would require three, four, or more coats
of color mixed with oil as now ordinarily prepared.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Pierre Gontier in the Great Seal Patent Office on the
14th February 1856.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, PIERRE
GONTIER, of Paris, France, Chemist, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twentieth day of August, in the year of our Lord
One thousand eight hundred and fifty-five, in the nineteenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Pierre Gontier, Her special licence that I, the said Pierre Gontier, my
executors, administrators, and assigns, or such others as I, the said Pierre
Gontier, my 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 TREATING
LINSEED, POPPY, AND OTHER OILS EMPLOYED IN THE MIXING OF PAINT," upon the
condition (amongst others) that I, the said Pierre Gontier, by an instrument
in writing under my hand and seal, 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 Pierre Gontier, 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 :-
My Invention consists in treating linseed, poppy, and other oils employed in
the mixing of paint, by adding to these oils over the fire, or when slightly
heated, sulphuric acid, resin, and manganese or litharge. Colors mixed with
oils treated with the above materials acquire the property of covering in two
coatings a surface which would require three, four, or more coatings of color
mixed with oils as now ordinarily employed.
I now proceed to describe the manner in which I carry my Invention into
effect, taking, for example, the preparation of linseed oils; firstly, for zinc
white; and, secondly, for white lead and other lead colors.
To treat oil for nixing with zinc white.-I first clarify the oil, by adding

page_text: about 2 lbs. of sulphuric acid to every 225 lbs. oil, and beat up the mixture
for half an hour; I then add about 35 pints warm water, and continue the
beating up for another half hour; I leave the mixture to stand for about eight
days, and then filter it through a piece of cloth or through charcoal, and pour
off the oil thus clarified into a receiver. I now take 30 lbs. per cent. of the
clarified oil, and place it in a suitable vessel over a fire, and add thereto 16 lbs.
resin, preferring the description known as colophany, and leave the mixture
over the fire till it boils. When I place the oil over the fire I suspend in it a
bag containing 6 lbs. of manganese, and keep it clear of the bottom of the
vessel. As soon as the mixture begius to boil I remove the manganese, which
may be used again and again without losing its strength. The boiling oil is
then poured back into the receiver which contains the remainder of the oil,
and the whole is well stirred for a few seconds and left to cool, and when cold
the oil is ready for use.
To treat oil for mixing with white lead and other lead colors.-I prepare
it in the same manner as just described for mixing with zinc white, but with
these exceptions, that I substitute oxide of lead or litharge for the man-
ganese (in the samo proportion), and instead of 16 lbs. of resin to every 30 lbs.
of clarified oil, I use 6 lbs. of the resin. I do not, however, restrict myself
to the precise proportions herein-before given, as the same may be slightly
varied.
And having now described the nature of my said Invention, and in what
manner the same is to be performed, I declare that I claim, as constituting my
said Invention, the treating of oils employed in the mixing of paints, by adding
to these oils over a fire, or when slightly heated, sulphuric acid, resin, and
manganese or litharge.
In witness whereof, I, the said Pierre Gontier, have hereunto set my
hand and seal, this Ninth day of February, One thousand eight
hundred and fifty-six.
P. GONTIER. (L.S.)