AN IMPROVED METHOD OF PRODUCING AND REPRODUCING DRAWINGS, DEVICES, AND DESIGNS ON PORCELAIN, DELPH-WARE, AND SUCH LIKE MATERIALS.
Year: 1873

page_text: LETTERS PATENT to Léon Frèret, of Princes Street, Barbican, in the
City of London, for the Invention of "AN IMPROVED METHOD OF
PRODUCING AND REPRODUCING DRAWINGS, DEVICES, AND DESIGNS ON PORCELAIN,
DELPH-WARE, AND SUCH LIKE MATERIALS.' A communication from
abroad by Paul Marny Godard, of No. 62, Rue Triquetonne, Paris,
in the French Republic.
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PROVISIONAL SPECIFICATION left by the said Léon Frèret at the
Office of the Commissioners of Patents, with his Petition, on the
12th June 1873.
I, LÉON FRÈRET, of Princes Street, Barbican, in the City of London,
do hereby declare the nature of the said Invention for "AN IMPROVED
METHOD OF PRODUCING AND REPRODUCING DRAWINGS, DEVICES, AND DESIGNS ON
PORCELAIN, DELPH-WABE, AND BUCH LIKE MATERIALS,” a communication to him
from abroad by Paul Marny Godard, of No. 62, Rue Triquetonne, Paris,
in the French Republic, to be as follows:-
By this Invention all kinds of drawings, portraits, ornaments, land-
scapes, and devices can be obtained and reproduced or copied direct

page_text: upon porcelain, delph-ware, biscuit, or enamel, and other materials of
the same character, by the following means:-I take any kind of
drawing, painting, engraving, or positive or negative pictures or
subjects, produced in the manner commonly practised by photographers
according to the carbon process, and print or copy them in the manner
practised by photographic artists. The proofs so copied on porcelain or
other like materials I then coat or cover with enamel or vitreous glaze
and bake in an oven, and in this manner and by these means I obtain
direct proofs of drawings, landscapes, and other devices or portraits on
porcelain, delph, and other pottery ware.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Léon Frèret in the Great Seal Patent Office on
the 12th December 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, LÉON
FRERET, of Princes Street, Barbican, in the City of London, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twelfth day of June, in the year
of our Lord One thousand eight hundred and seventy-three, in the
thirty-sixth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Léon Frèret, Her special licence that I,
the said Léon Freret, my executors, administrators, and assigns, or such
others as I, the said Léon Frèret, 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 "AN IMPROVED METHOD OF PRODUCING AND REPRODUCING
DRAWINGS, DEVICES, AND DESIGNS, ON PORCELAIN, DELPH-WARE, AND SUCH LIKE
MATERIALS," a communication from abroad by Paul Marny Godard, of
No. 62, Rue Triquetonne, Paris, in the French Republic, upon the
condition (amongst others) that I, the said Léon Frèret, 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

page_text: 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 Léon Frèret, 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, that is to say :-
By this Invention all kinds of drawings, portraits, ornaments, land-
scapes, and devices, can be obtained and reproduced or copied direct
upon porcelain, delph-ware, biscuit, or enamel, and other materials of
the same character by the following means:-I take any kind of
drawing, painting, engraving, or positive or negative pictures or subjects,
produced in the manner commonly practised by photographers according
to the carbon process, and print or copy them in the manner practised
by photographic artists. The proofs so copied on porcelain or other like
materials I then coat or cover with enamel or vitreous glaze and bake in
an oven. And in this manner and by these means I obtain direct
proofs of drawings, landscapes, and other devices or portraits on
porcelain, delph, and other pottery wares..
And in order to explain this Invention more fully I now proceed to
describe the means by which it may be carried into practical effect.
I take any drawing, landscape, and other device or portrait, and
having produced a negative therefrom, I print from this negative the
picture or portrait thereon represented on paper prepared by means of
the following bath:
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First. A solution of glycerine water and color.
Second.. Pure gelatine, melted in a water bath.
Third. A solution of bichromate of potash.
This bath is kept at a temperature of 90 to 100 degrees Fahrenheit.
One surface of a sheet of paper is wetted in this bath and then allowed
to dry in a dark room.
The negative plate on which the desired subject has been photo-
graphed, is applied on the said prepared paper and exposed to the light for
a suitable space of time in the manner practised by photographers when

page_text: copying ordinary photographs. When the paper has been sufficiently
exposed to the light it is placed in cold water until well soaked. It is
then applied on porcelain, delph-ware, biscuit, enamel, or other
materials of the same character, and by means of pressure is made to
adhere thereto. The whole is then placed in a warm water bath at
about 100 degrees Farenheit. In the course of a few minutes the
paper will detach itself leaving the gelatine on the object on which it
has been applied. Bichromate of potash, having the property of
rendering gelatine insoluble after it has been exposed to light all the
parts which have been exposed will be fixed to the porcelain or other
material, and the remainder will be detached by the hot water and thus
leave a perfect picture of the negative on the object on which the said
picture has been applied.
I would here remark that mineral colors should be used in these
reproductions as vegetable colors would be destroyed by heat. I then
coat or cover the picture with enamel or vitreous glaze and bake in an
oven.
Having now described and set forth the nature and object of this
Invention for "An Improved Method of Producing and Reproducing
Drawings, Devices, and Designs, on Porcelain, Delph-ware, and such
like Materials," I would remark in conclusion that I hereby declare this
Invention to consist in and I claim, the mode of reproducing drawings,
devices, and designs on porcelain delph-ware, and such like materials,
substantially as above described and set forth, by means of the carbon
process above mentioned.
In witness whereof, I, the said Léon Frèret, have hereunto set my
hand and seal, this Eleventh day of December, in the year of our
Lord One thousand eight hundred and seventy-three.