Improvements in Preparing Glass and the like for the Production of Designs thereon by Etching.
Year: 1899

page_text: Date of Application, 11th Sept., 1899-Accepted, 28th Oct., 1899
COMPLETE SPECIFICATION.
Improvements in Preparing Glass and the like for the Production of
Designs thereon by Etching.
We, LEONHARD KIESEL, Merchant, and FRANZ WATZINA, Lithographer, both
of 110, Bahnhofstrasse, Essen-Ruhr, Essen, in the Empire of Germany, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed to be particularly described and ascertained in and by the following
statement:
Heretofore glass was prepared for the etching process, by placing the required
design underneath the glass and then tracing the design by hand thereon by
means of a brush containing the fluid protecting medium, such as asphalting
solution. This operation requires very great skill on the part of the operator,
takes a considerable time, and even with the greatest care no two copies are
exactly alike.
The present invention has for its object to greatly facilitate and expedite the
preparation of the glass for the etching process, at the same time insuring
accurately similar copies and considerably cheapening the manufacture of orna-
mental etched glass as no skilled artistic labour is required. The improved
process is as follows: The required design which may be either a drawing or
writing is printed upon transfer paper by any suitable known process such as
lithography, typography, zincography, autotype process and the like. While the
impressed design on the transfer paper is still moist or sticky, it is powdered
over with powdered resin or other suitable material, which consequently only
adheres to the parts printed upon, while it falls off the other parts. By this
means a design coated with the protective medium is obtained.
The design is then subjected to a moderate heat so that the powdered pro-
tective medium melts forming a cohering layer, and the design thus prepared
is then applied to the glass to be treated.
The application can be effected either by pressing the design upon the glass
by passing a heated roller over the back of the transfer paper, or by moistening
the protective layer on the design with spirits or other solvent sprayed on, and
after applying the same to glass, pressing it down by a roller.
The paper is afterwards wetted on the back and after a few minutes it is drawn
off, leaving the design which is proof against the etching fluid, firmly adhering
to the glass, and this is then treated with the etching fluid and finished in the
usual manner.
It will be obvious that the above described method of coating transfer designs
with a melted coating of protective material can be employed for the production of
all kinds of etched work on glass or the like.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what
we claim is:-
1. Process for preparing glass and the like for the production of etched
designs thereon, which consists in printing the design by lithography typography.

page_text: zincography autotype process or other known means on to transfer paper, then
dusting over the printed design with powdered resin or other suitable protective
material, then subjecting the impression to heat so as to melt the protective
material and after applying the design to the surface to be etched and causing
it to adhere thereto by rolling if necessary with a heated roller, moistening the
back of the transfer paper and removing it from the said surface, substantially
as described.
2. In the process referred to in the first claim, moistening the melted protec-
tive coating of the design with a solvent before applying it to the surface to be
etched, substantially as described.
1 1
111
I Cantamban 1000
ABEL & IMRAY,
Agents for the Applicants.