Improvements in or relating to the Preparation or Reproduction of Drawings, Etchings, and the like.
Year: 1897

page_text: Date of Application, 3rd July, 1897-Accepted, 7th Aug., 1897
COMPLETE SPECIFICATION.
Improvements in or relating to the Preparation or Reproduction of
Drawings, Etchings, and the like.
I, MAX BERNSTEIN, Proprietor of the Firm of Joh. Friedr. Wallmann & Co.
of 74 Blumenstrasse Berlin, in the Empire of Germany, 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 relates to an etching process for reproducing by printing as well
as by photography drawings of all kinds or the preparation of drawings directly
from nature.
Hitherto etching has been done on copper the operation consisting in coating
a copper plate with a layer of asphalte wax or the like and then the drawing being
made in this coating by means of a point or needle. Then the plate is treated
with acid so that the portions erased would be etched out the other portions
remaining in relief.
This invention substantially consists in using instead of a copper plate a glass
plate covered with a coat of paint as used by painters on glass and making the
drawing on this layer. This process has the advantage that not only the engraver's
needle can be used but also coarse or very fine portions of the drawing can be
treated or put in with a brush whereby the picture can be made incomparably
finer and the artist can at any moment see the positive of his picture by simply
turning the glass plate over.
The plate prepared in this way is then at once ready for photographing and if
more impressions are to be taken from it the drawing may be burnt in an oven
whereby indestructible plate is obtained which can still be altered or modified by
retouching putting in lights etc.
As the layer of paint stands out a little over the surface of glass the plate can be
used for printing by rolling it up with colour in which case of course a thick plate
is necessary to withstand the pressure used.
Corresponding with the process for preparing the described plates is the burning
in of metallic paint on metal plates for printing purposes.
The process according to the present invention has the following advantages over
other processes of preparing drawings and etchings.
1. Cheapness of material.
2. Rapidity of preparation owing to the possibility of reproducing even before
burning in or firing.
3. Combined use of needle and brush.
4. The production of improved detail and tone effects which cannot be produced
by either pen chinese ink or ordinary etching.
5. The possibility of putting in lights by the direct use of fluid glass paint.
6. Sharply defined details.
7. Indestructibility of the plate after firing.
8. The possibility of retouching after firing.
9. The production of various effects by photography owing to the use of papers
having different qualities.

page_text: Having now particularly described and ascertained the nature of the said in-
vention and in what manner the same is to be performed I declare that what I
claim is:
1. The method of producing drawings for reproduction purposes characterised
by the drawing being produced on a glass plate covered with a coat of paint and
the plate thus produced being fired in an oven substantially as described.
1007
BOULT & WADE,
Agents for the Applicant.