An Improved Process of Reproducing Pictures, Photographs, Drawings, and the like.
Year: 1898

page_text: Date of Application, 23rd Dec., 1898
Complete Specification Left, 22nd Sept., 1899-Accepted, 18th Dec., 1899
PROVISIONAL SPECIFICATION.
An Improved Process of Reproducing Pictures, Photographs,
Drawings, and the like.
I, HEINRICH BIERENZ, of IX Lustkandlgasse 6, Vienna, in the Empire of
Austria, Photographer, do hereby declare the nature of this invention to be as
follows.
This invention consists in employing, in the reproduction of pictures, photo-
graphs, diawings, and also of colour-prints, original articles, and so on, a
specially prepared plate, preferably of metal, such as zinc, copper or the like,-
the suitace of which 18 capable of receiving a direct transfer vi impression of
the drawing, photograph on the like, which it 18 intended to reproduce, as 'it
already possesses that giained texture which is requisite for the "decomposition"
pattern or design which reproduction necessitates.
")
The usual practice, hitherto, has been to provide for the decomposition of the
image or object to be reproduced according to the given systems of lines or dots
(2 e the shading hatching dotting, gaining &c.) by fust obtaining
a photographic negative of the object, using a well-known special appliance foi
the photographic reproduction of grained paper in the case of diawings, sketches
or the like, then, transferring the image by a somewhat complicated method
from the negative to the plate that was to receive the reproduction.
66
The improved plate which I propose to employ in the performance of my simpli-
hed process is produced as follows After being fist polished or smoothed down,
it 18, by any suitable means, subjected to the action of a sharp blast charged with
sand, iron filings or similar bodies for an adequate length of time, whereby
the giaining," alieady mentioned, 18 obtained, which renders the plate capable
of receiving the image direct It may be mentioned in this connection that the
resulting fine, though negular dotting, in the grain of the plate, 18 calculated
to prove very beneficial to the effect of the reproduction eventually obtained, and
that this advantage becomes manifest also in colour-printing as it enables the
possible unsightly effects of the juxtaposition of geometrical figures, into which
the design has been divided (by means of stencil plates, squares and the like,)
in the superposed punting of different shades of colour to be obviated.
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The following are the results which the novel process, involving the employ-
ment of the zinc (or other plate), giained as described, enables to be attained
(1) Any given pictures may be re-produced with suitable diawing materials,
preferably fat chalk (crayons) or fat Indian ink and so on, upon a plate, direct,
so that it is ready for immediate etching, engraving, "iouletting' 01 photo-
graphing, it being important, in regard to these reproductions that any necessary
corrections in the picture such as effacing, rubbing out, or retransfeiring, should
be readily feasible The fixing of a picture thus reproduced in a manner adapted
tor printing may be effected similarly to the way in which this has been done
then to, uz, by sprinkling it with some powdered substance, such as asphalt or
the like, resisting the action of acids, and then dipping the plate in a bath
prepared with certain acids, washing the same, and so on, until a plate adapted
to be printed from is obtained.

page_text: (2) Duect reproduction with the assistance of photography becomes possible
Owing to the fact that after the preparation of the giained plate with substances,
such as chiome salts or the like, sensitive to the action of light, a picture diaw-
ing or other object may be duectly photographed, the negative thus obtained,--
which by the way, may be developed by the aid of a prism even where the picture
to be reproduced was during the exposure turned down (or inverted), being capable
at the same time, by proper treatment with fatty colouring substances, such as
pinters ink on the like, of being developed and fixed upon the grained plate
Fumness is added to the fixing by the method described in paragraph 1, whereby
the plate is rendered fit for printing off any desired number of copies
(3) By the aid of photography the novel process will prove serviceable induectly
preparing positive plates or images, as the decomposition of the photographic
picture into variously shaded (dotted hatched, and the like) paits, and conse-
quently the employment of transparent, stencil, graining or other similar plates
01 frames, are avoided, the picture or the like to be reproduced being taken
in the well known manner as a negative, upon a glass plate, the novel feature in
this connection being that the negative may be taken even by the diy, or gelative,
process The negative plate 18 then placed upon the giamed zinc or other plate,
which has been previously sensitized by being covered with a film of substances
sensitive to the action of light, such as chrome salts and the like, the plate
being then exposed to the light, whereby, upon the grained plate, there is
obtained a positive image, which in other respects, for purposes of repro-
duction by pinting, may be treated in the manner described in the concluding
part of paragraph 1, so as to make it stand out more clearly, and fix it more
firmly for punting purposes.
(4) The new method which consists in employing a grained zinc or other plate
is also suited to the purposes of chromography, the fineness of the graining causing
the colouring of the image to appear clearer or puier than it would other w 18e
be, while in the case of particoloured designs or pictures in more than one colour,
the superposed colours become better assimilated and are brought out more fully,
in addition to which the several successive photographic views of the picture ou
object, which have to be taken in this last mentioned case, may-unless a transfer
18 intended, be conveniently treated by the simplified process above described
and be readily corrected in case of need
(5) Pictures may be transferred by fat printing from one plate, which may be
lithographic stone, a heliographic plate or the like, to a plate constructed in
accordance with this invention
☐ 1 J... 1000
HASELTINE, LAKE & Co,
45, Southampton Buildings, London, WC,
Agents for the Applicant.
An Improved Process of Reproducing Pictures, Photographs,
Drawings, and the like.
I, HEINRICH BIERENZ, of IX Lusthandlgasse 6, Vienna, in the Empire of
Austria, Photographer, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascen-
tained in and by the following statement
This invention consists in employing, in the reproduction of pictures, photo-
graphs, diawings, and also of coloui-prints, original articles, and so on, a

page_text: specially prepared plate, preferably of metal,--such as zinc, copper or the like,—
the surface of which is capable of receiving a device transfer or impression of
the drawing, photograph on the like, which it is intended to reproduce, as it
already possesses that giained texture which is requisite for the "decomposition
pattern or design which reproduction necessitates
"
The usual practice, hitherto, has been to provide for the "decomposition" of the
image or object to be reproduced according to the given systems of lines oi dots
(e the shading, hatching, dotting, graining and the like) by first obtaining
a photographic negative of the object, using a well-known special appliance foi
the photographic reproduction of grained paper in the case of drawings, sketches
or the like, then, transferring the image by a somewhat complicated method
from the negative to the plate that was to receive the reproduction.
The improved plate which I propose to employ in the performance of my simpli-
fied process is produced as follows. After being fist polished or smoothed down.
it is, by any suitable means, subjected to the action of a sharp blast chaiged with
sand, iron filings or similar bodies for an adequate length of time, whereby
the "
graining," already mentioned, is obtained, which renders the plate capable
of receiving the image direct. It may be mentioned in this connection that the
resulting fine, though uregular dotting, in the graining of the plate, 18 calculated
to prove very beneficial to the effect of the reproduction eventually obtained, and
that this advantage becomes manifest also in colour-printing, as it enables the
possible unsightly effects of the juxtaposition of geometrical figures, into which
the design has been divided (by means of stencil plates, squares and the like,)
in the superposed printing of different shades of colour to be obviated.
"
The following are the results which the novel process, involving the emplov-
ment of the zine (or other plate), grained as described, enables me to attain:
(1) Any given picture may be ie-produced with suitable diawing materials,
preferably fat chalk (crayons) or fat Indian ink and so on, upon a plate, direct,
80 that it is ready for immediate etching, engraving, "iouletting or photo-
graphing, it being important, in regard to these reproductions that any necessar
corrections in the picture such as effacing, rubbing out, or retransferring, should
be readily feasible The fixing of a picture thus reproduced in a manner adapted
for punting may be effected in a manner similarly to that hitherto employed,
uzby sprinkling it with some powder el substance, such as asphalte or the
like, resisting the action of acids, and then dipping the plate in a bath prepared
with certain acids, washing the same, and so on, until a plate adapted to be
printed from 18 obtained
(2) Duect reproduction with the assistance of photography becomes possible
owing to the fact that after the preparation of the giained plate with substances,---
such as chiome salts or the like,-sensitive to the action of light, a picture diaw-
ing or other object may be directly photographed; the negative thus obtained,
may be developed by the way by the aid of a prism, even where the picture to be
reproduced was, during the exposure tuined down (or inverted). The grained
sensitized plate (with gelatine film which has been treated with chrome salts) is
placed into the photographic camera in the same manner as an ordinary glass-
plate and is then exposed It 18 advantageous to have a strong light for exposing
(full sunshine, electric light, or the like). The negative is then taken into the
dark 100m and blackened in with soft or fat colour, treated with water and
the shade portions cleaned from off the fat colour, (which adheres to the gelatine
which is still soluble,) by the aid of wool or the like Hereupon it 18 dusted over
with fine asphalte powder and the plate is now ready for buining and etching
by which lafter procedure the picture is rendered ready for reproduction.
(3) By the aid of photography the novel process will prove serviceable in duectly
preparing positive plates or images, as the decomposition of the photographic
picture into variously shaded (dotted, hatched, and the like) parts, and conse-
quently the employment of transparent, stencil, graining or other similar plates
or frames, are avoided; the picture or the like to be reproduced being taken

page_text: process
in the well known manner as a negative, upon a glass plate, the novel feature in
this connection being that the negative may be taken even by the diy, oi gelatine,
The negative plate 18 then placed upon the giamed zinc or other plate,
which has been previously sensitized by being covered with a film of substances
sensitive to the action of light, such as chiome salts and the like, the plate
being then exposed to the light, whereby, upon the grained plate, theie 18
obtained a positive image, which in other respects, for purposes of
Періо-
duction by painting, may be treated in the manner described in the concluding
part of paragraph 1, so as to make it stand out more clearly, and fix it more
firmly for printing purposes
(4) The new method which consists in employing a grained zinc or other plate
18 also suited to the purposes of chromography, the fineness of the graining causing
the colouring of the image to appear clearer or puter than it would otherwise
be, while in the case of pailicoloured designs or pictures in more than one colour,
the super posed colours become better assimilated and are brought out more fully,
in addition to which the several successive photographic views of the picture oi
object, which have to be taken in this last mentioned case, may-unless a transfer
is intended, be conveniently treated by the simplified process above described
and be readily corrected in case of need.
(5) Pictures may be transfered by fat pinting from one plate, which may be
lithographic stone, a heliographic plate on the like, to a plate constructed in
accordance with this invention
Having now particularly described and ascertamed the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is.
1 A simplified process of graphic reproduction, in the performance of which a
specially giained plate, preferably of metal, is emploved, the sui fare of which
already possesses the "decomposition" designs, or gaining, the picture or object
to be reproduced being transferred to this plate direct, by being either diawn o
photographed thereon
2 The plate mentioned in the first claim, preferably of copper, zinc or other
mateual, which has had a giamed texture imparted to it by artificial means such
as a sand blast on the like, and therefore aheady presents the inequalities of
sui face (forming what is known as the "decomposition pattern or design)
required for reproductive painting, so that reproductions or copies may be printed
off such plate direct
Dated this 22nd day of September 1899
September 1899
HASELTINE, LAKE & Co.,
45, Southampton Buildings, Loudon, WC,
Agents for the Applicant