Year: 1888

page_text: We, CHARLES JOSEPH LEROUX and JULES HENRI FISCHBACH of 95 Boulevard
Beaumarchais, Paris in the Republic of France, Engineers, do hereby declare the
nature of this invention to be as follows:-
Numerous experiments have been made for the purpose of producing firm and fast
painting on. metal plates, but the different processes which have been used have
given but very unsatisfactory results. This is mostly due to the paint not being.
sufficiently fast.
The object of the present process is to obviate these disadvantages and to produce
a painting not affected by atinospheric changes and which can therefore be employed
in the open air.
The process
is as follows:
The metal plate which is to be painted is fixed to a piece of canvas by means of
rye flour paste, when this is dry the plate is cleaned with essence of turpentine and
the painting can then be begun. The colours employed are ground with turpentine
and diluted with thick varnish. The first coating of paint is extended over the metal
plate and the canvas, which is then placed in the stove and fired at a temperature of
from 50° to a 100° centigrade according to the nature of the product and circumstances.
The other coats are made in the same manner and always subjected to a similar
firing. When the decoration of the plate is finished it is coated with a last coat of
varnish and subjected to a last firing.
Thus prepared the plates are fastened to the wall by means of rye paste mixed
with Flemish glue when the wall is dry, but if the wall is at all damp the plates are
fixed by means of a mixture of white lead, linseed oil and turpentine well worked up
together.
The canvas facilitates the fixing of the plates and also strengthens the metal
plates which are always very thin. The fixing of the plates might have the effect to
soften the canvas and to cause it to separate from the metal, but to prevent this the
first coat of paint is extended also over the canvas rendering this impermeable.

page_text: If the canvas is coarse enough it gives the plate a certain grain which might often
be used advantageously, for instance for imitating tapestry. The plates may more-
over be stamped or pressed with designs before being painted and can afterwards
be painted in different colours according to the design.
The plates can be applied indoors or in the open air and can be made to imitate
wood, metals, fabric or tapestry and the like.
For the imitation of silver a simple coat of varnish on tin plates will be sufficient,
while for the imitation of gold a special tinting before the varnishing must take
place.
This process can be employed with plates of all sizes as also for letters for signs
and the like.
Dated this 6th day of September 1888.

page_text: Improved Process for Fired Painting on Metal Plates.
We, CHARLES JOSEPH LEROUX and JULES HENRI FISCHBACH, both of Paris in
the Republic of France, Engineers, do hereby declare the nature of this invention and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement
--
Numerous experiments have been made for the purpose of producing firm and fast
painting on metal plates, but the different processes which have been used have given
but very unsatisfactory results. This is mostly due to the paint not being sufficiently
fast.
The object of the present process is to obviate these disadvantages and to produce a
painting not affected by atmospheric changes and which can therefore be employed in
the open air.
The process is as follows:
The metal plate which is to be painted is fixed to a piece of canvas by means of ryc
flour paste; when this is dry the plate is cleaned with essence of turpentine and the
painting can then be begun. The colours employed are ground with turpentine and
diluted with thick varnish. The first coating of paint is extended over the metal plate
and the canvas, which is then placed in the stove and fired at a temperature of from
50° to a 100° Centigrade according to the nature of the product and circumstances. The
other coats are made in the same manner and always subjected to a similar firing.
When the decoration of the plate is finished it is coated with a last coat of varnish
and subjected to a last varnish.
Thus prepared the plates are fastened to the wall by means of rye paste mixed with
Flemish glue when the wall is dry, but if the wall is at all damp, the plates are
fixed by means of a mixture of white lead, linseed oil and turpentine well worked up
together.
The canvas facilitates the fixing of the plates and also strengthens the metal plates
which are always very thin. The fixing of the plates might have the effect of
softening the canvas and causing it to separate from the metal, but to prevent this
the first coat of paint is extended also over the canvas rendering this impermeable.
If the canvas is coarse enough it gives the plate a certain grain which might often
be used advantageously, for instance for imitating tapestry. The plates may more-
over be stamped or pressed with designs before being painted and can afterwards be
painted in different colours according to the design.
The plates can be applied indoors or in the open air and can be made to imitate
wood, metals, fabric or tapestry and the like.
For the imitation of silver a simple coat of varnish on tin plates will be sufficient,
while for the imitation of gold a special tinting before the varnishing must take
place.
This process can be employed with plates of all sizes as also for letters for signs
and the like.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :
1. The process substantially as specified for the production of painted metal plates
and consisting in
(a) Backing the plate with more or less fine canvas according to the effect to be
produced and fixing the canvas by means of rye flour paste.
(b) Grinding the colours with turpentine and mixing them with thick varnish.
(c) Covering both plate and canvas with the first coat of paint and firing at a
suitable temperature.
(d) Firing each succeeding coat of colour and the last coat of varnish.