An Improved Method for Producing Coloured Designs on Glass.
Year: 1890

page_text: Date of Application, 26th June, 1890
Complete Specification Left, 26th Feb., 1891-Accepted, 25th Apr., 1891
PROVISIONAL SPECIFICATION.
An Improved Method for Producing Coloured Designs on Glass.
I, OTTO DILLMANN, of Findlingstrasse, 10, Munich, in the Empire of Germany,
Artist, do hereby declare the nature of this invention to be as follows
:―
The object of this invention is to produce glass with coloured designs in which a
greater variety of colours may be obtained at less cost than by the usual method
alone.
To this end the invention consists in the placing together of two panes of
flashed glass previously etched in different manners so that the coloured part of the
one may coincide with the plain part of the other. By this means I obtain a pane
of glass having designs produced by etching from flashed glass in two ground or
primary colours whereas by etching on a double flashed glass only two colours can
be obtained (except the clear glass) namely the one pure ground colour and the
other double or blended colour.
Furthermore by such method of superposition of two independently etched single
flashed glasses besides obtaining a design in two pure ground colours by exact
coincidence of the etched and unetched surfaces I may have clear glass by coinci-
dence of etched portions and also the blended colour of the two ground colours by
means of the coincidence of the unetched portions. By the use of two double
flashed glasses in like manner I may obtain clear glass, two primary or ground
colours and six blended or secondary colours the first being the combination of the
four colours the second and third being after the removal by etching of the
respective surface colour of the one or other glass leaving a combination of three
colours the fourth being after removal of the surface colours only of each glass
the fifth and sixth respectively after removal of both flashings of the one or other
glass, leaving clear glass of the one or other glass these last three, the fourth, fifth
and sixth being combinations of two colours.
Dated this 26th day of June 1890.
HERBERT & Co.,
Agents to Applicant,
COMPLETE SPECIFICATION.
An Improved Method for Producing Coloured Designs on Glass.
I, OTTO DILLMANN, of Findlingstrasse, 10, Munich, in the Empire of Germany,
Artist, 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 :-
The object of this invention is to produce glass with coloured designs in which
a greater variety of colours may be obtained at less cost than by the usual method
alone.
To this end the invention consists in the placing together of two panes of flashed
glass previously etched in different manners so that the coloured part of the one
may coincide with the plain part of the other. By this means I obtain a pane of
glass having designs produced by etching from flashed glass in two ground or
primary colours whereas by etching on a double flashed glass only two colours can
be obtained (except the clear glass) namely the one pure ground colour and the
other double or blended colour.
Furthermore by such method of superposition of two independently etched single
flashed glasses, besides obtaining a design in two pure ground colours by exact
coincidence of the etched and unetched surfaces, I may have clear glass by

page_text: coincidence of etched portions and also the blended colour of the two ground colours
by means of the coincidence of unetched portions.
By the use of two double flashed glasses in like manner I may obtain clear glass,
two primary or ground colours and six blended or secondary colours the first being
the combination of the four colours, the second and third being after the removal
by etching of the respective surface colour of the one or other glass, leaving a
combination of three colours, the fourth being after removal of the surface colours
only of each glass the fifth and sixth respectively after removal of both flashings
of the one or other glass leaving clear glass of the one or other glass, these last
three, the fourth fifth and sixth being combinations of two colours.
Reference being made to the accompanying drawing
Fig. 1 illustrates a plate a of single flashed glass etched with a design.
Fig. 2 illustrates a plate b of single flashed glass of another' colour etched with
a design.
Fig. 3 shows these two plates superposed illustrating the combination of the two
designs to form one design.
Fig. 4 shows the two plates in cross section.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. The method of producing coloured designs upon glass consisting in the
etching of two plates of flashed glass and the superposing of said plates whereby
designs are formed by the combinations of the etched and unetched portions
substantially as set forth.
2. The method of producing coloured designs upon glass consisting in the partial
and complete etching of two plates of double flashed glass and the superposing of
said plates whereby designs are formed by the combinations of the etched and
unetched portions substantially as set forth."
HERBERT & Co.,
18, Buckingham Street, Strand, W.C., Agents to Applicant.