Designs thereon, and in the Means of Producing such Colored Designs thereon.
Year: 1885

page_text: Designs thereon, and in the Means of Producing such Colored
Designs thereon.
I GEORGE KISSAM COOKE of 12 Harp Alley, Farringdon Street in the City of
London, Manufacturer, do hereby declare the nature of my said invention for
AN IMPROVED METHOD OF PREPARING GLASS FOR FORMING COLORED DESIGNS
THEREON AND IN THE MEANS OF PRODUCING SUCH COLORED DESIGNS THEREON
to be as follows:-
23
This Invention relates to an improved method of preparing glass for forming
colored designs thereon and in the means of producing such colored designs
thereon.
In carrying my Invention into practice :-I take a piece of glass colored or plain
and on each flat side thereof I flash or fuse one or more thin films of colored glass
or glaze.
"
The design is first placed upon one side of the glass, those parts forming the
design being composed of a "resist
or the design may be the exposed surface of
the glass surrounded by the "resist."
The resist may be formed of prepared asphaltum, wax or other resisting material
which will prevent a corroding acid attacking those parts of the glass so covered
those parts of the glass upon which the acid is to act being left exposed.
That portion of the film of glass not covered with the resist is then eaten away
with a suitable corroding acid which attacks the film of glaze or glass but not the
resist leaving the plain glass or the next colored film underneath exposed as may
be desired.
It will thus be seen that by removing those portions of the film from one side
of the glass that it will expose the film next against it.
To vary the design so etched on one side of the glass that when held against the
light, it will show different colors, the design may, for forming the next color, be
placed upon the opposite side of the glass in correct register with the design
already produced and treated as before described to remove that portion of the
film or films not required in the design.
The design may be applied to the glass by any convenient means which will
ensure perfect register but preferably by means of a "resist" prepared to be
insoluble in its natural solvent when exposed to the action of light, which allows
of designs being formed in the glass in such suitable resist by the action of the
sun, the soluble portion of the resist being removed exposing the glass for etching.
Dated 2nd day of February 1885

page_text: Designs thereon, and in the Means of Producing such Colored
Designs thereon.
I GEORGE KISSAM COOKE, of 67 Cow Cross Street, in the county of Middlesex,
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:-
In carrying my invention into practice I take a piece of glass colored or plain
and on each flat side thereof I flash or fuse one or more thin films of colored glass
or glaze, or I flash or fuse two or more films on one side thereof.
The design to be produced is first placed upon one side of the glass, those parts
forming the design being composed of any well known "resist."
The "resist" which I have found to give good results is formed of prepared
asphaltum such as is used in zinco-graphy or wax or other resisting material which
will prevent a corrosive acid such as fluoric acid attacking those parts of the glass
so covered, those parts of the glass upon which the acid is to act being left
exposed.
That portion of the colored film of glass not covered with the "resist" is then
eaten away with a suitable corrosive acid which attacks the film of glass or glaze,
but not the "resist," leaving the plain glass or the next colored film underneath
exposed, or only partially eating away the colored film or films as may be desired.
It will thus be seen that by removing those portions of the film from one side
of the glass, that it will more or less expose the film next against it or the plain or
colored glass according to whether there is more than one film or not formed upon
it. To vary the design so formed or etched on one side of the glass in order that
when held against the light or viewed by transmitted light it will show different
colors; the design in "resist" for forming the next color is placed upon the
opposite side of the glass in correct register with or local relation to the design
already produced; it is then treated as before described so as to remove that portion
of the film or films not required in the design.
The design in resist can be applied to the glass by any convenient means
which will insure perfect register but preferably by means of any well known
"resist" prepared so as to be insoluble in its natural solvent when exposed to the
action of light which will allow of designs being formed on the glass in such
suitable "resist" by the action of the sun, the soluble portion of the "resist being
removed, thereby exposing the glass for etching.
"
It will be obvious that if it be desired to abrade instead of corrode those
portions of the design exposed, any suitable process such as the sand blast can be.
employed, a proper " resist or protection adapted to such processes being used.
"
By treating the surfaces of glass in the manner above described, varied coloured
effects and shades are. obtained which resemble those of stained or painted glass
and obviously at a much reduced cost.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that
what I claim is
1. The production as herein described of colored designs on glass prepared as
above described by removing portions of the colored film or films from the glass
substantially as and for the purposes herein before described.
2. The manufacture and use of glass formed with colored designs substantially
as hereinbefore described.