An Improved Process for Decorating Glass Panels and the like, for Covering Walls or similar surfaces.
Year: 1898

page_text: Date o Application, 8th Mar., 1898-Accepted, 20th May, 1898
COMPLETE SPECIFICATION.
An Improved Process for Decorating Glass Panels and the like, for
Covering Walls or similar surfaces.
I, LEON MONDRON, of Verreries de la Planche, Lodelinsart, Belgium, Glass
Manufacturer, 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:-
This invention has for its object the decoration of opal glasses and the like
intended for the covering of walls or analogous uses. The opal glasses have designs
or drawings impressed upon or transferred to their surfaces and are treated with
artistic and decorative subjects coloured with materials prepared by the improved
process.
"
These glass panels provided with designs or ornaments present over the decorated
faience squares at present in use the advantage of being less costly and further
the surface does not peel off or crack in the annealing process, and the finished
article is easily cut into squares with the aid of the diamond.
In carrying the invention into effect the required pigments or colours are
prepared of vitrifiable substances with the assistance of suitable fluxes and diverse
colouring matters according to the shades or tints required. The following list
gives the compositions for the different colours, and these mixtures when prepared
are melted and reduced to fine powder for use:-
COMPLETE SPECIFICATION.
An Improved Process for Decorating Glass Panels and the like, for
Covering Walls or similar surfaces.
I, LEON MONDRON, of Verreries de la Planche, Lodelinsart, Belgium, Glass
Manufacturer, 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:-
This invention has for its object the decoration of opal glasses and the like
intended for the covering of walls or analogous uses. The opal glasses have designs
or drawings impressed upon or transferred to their surfaces and are treated with
artistic and decorative subjects coloured with materials prepared by the improved
process.
"
These glass panels provided with designs or ornaments present over the decorated
faience squares at present in use the advantage of being less costly and further
the surface does not peel off or crack in the annealing process, and the finished
article is easily cut into squares with the aid of the diamond.
In carrying the invention into effect the required pigments or colours are
prepared of vitrifiable substances with the assistance of suitable fluxes and diverse
colouring matters according to the shades or tints required. The following list
gives the compositions for the different colours, and these mixtures when prepared
are melted and reduced to fine powder for use:-
Red colour (flesh).
Silica
Protoxide of lead
Borax
-
Red oxide of iron
10
25
7
10
Peroxide of copper
-
1
Silica
10
5
Red Purple.
Blue
Red lead
Powder of cassius, or gold
purple (variable according
to the shade desired)
Borax
(Silica
-
-
Carbonate of soda
Fluor spar
-
20
10
8
"
20%

page_text: Green
Violet.
Yellow (is obtained without
enamel).
Fluor spar
Red lead
Binoxide of copper
Oxide of iron
Nitrate of sodium
Silica
Carbonate of soda
Fluor spar
Red lead
Pyrolusite
Nitrate of sodium
Ochre -
Black.
15
2호
0.25
25263 00215303
-
-
-
8
10
Nitrate of silver
1
Silica
10
Carbonate of soda
Fluor spar
Red lead
Binoxide of copper
Pyrolusite
082004
6
Red oxide of iron
Nitrate of sodium
The shades obtained with these diverse compositions are varied in intensity
according to the proportions of colouring matter added to the flux and they can
thus gradate from the clearest to the darkest tint. As to the intermediate colours
they are obtained by combining the others according to the colour required.
When the transfer process is followed in placing the coloured design upon
the glass, the glass is covered in the first instance with a thin coat of a mixture
of colophony and turpentine. A sheet of paper is first coated with a gum com-
position or dextrine mixture and receives the design imprinted in one or several
of the colour mixtures herein before described. This sheet is damped and after
having been pressed slightly against the glass the design adheres and the paper
is removed. To fix the design, the glass is annealed in the usual manner.
Other transfer processes can also be employed. The design can for example
be imprinted in the improved vitrifiable colours upon a gelatinous pellicle, and
the pellicle fixed in turn on paper by a gummy solution. The paper is allowed
to soak in lukewarm water until the pellicle becomes loose, and then the paper
with its design placed outermost is arranged upon the glass which in this instance
is free from any coating. With one hand the gelatinous pellicle is held, while
with the other the paper is drawn away from underneath leaving the pellicle
upon the surface of the glass. In this case also annealing completes the process.
When the process of direct impression is employed the design or picture is
imprinted upon a thin sheet of paper directly with the vitrifiable colours from
a stereotype plate. This paper is afterwards damped and its printed face applied
to the glass surface. Here again annealing completes the process.
Having now particularly described and ascertained the nature of my said in-
vention, and in what manner the same is to be performed, I declare that what I
claim is:
1, An improved process for decorating clear or opal glass panels intended for
the covering of walls and the like consisting in transferring or directly applying
to these panels appropriate designs or ornaments in the vitrifiable colours sub-
stantially as herein before described, and afterwards annealing the same to render
them permanent.

page_text: 2,-The improved mixtures of vitrifiable materials and substances to produce
the primary colours directly or the secondary colours by mixture of the primary
all substantially as herein before described."
3,-In the production of decorated glass panels claimed in the preceding claims
the mode of transferring the ornament or picture by a gelatinous pellicle substan-
tially as hereinbefore described. .
Dated tis
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.