Improvements in Processes for Reproducing Pictures and Designs.
Year: 1889

page_text: Date of Application, 26th Feb., 1889
Complete Specification Left, 27th Dec., 1889-Accepted, 22nd Feb., 1850
PROVISIONAL SPECIFICATION.
Improvements in Processes for Reproducing Pictures and Designs.
I, HENRI JULES LE BOULCH, of Versailles, in the Republic of France do hereby
declare the nature of my invention to be as follows:-
By my invention a simple sheet of paper is used in place of stones, or copper or
other plates ordinarily used for the reproduction and multiplication of designs of
different sorts.
I take a sheet of transparent paper or other sufficiently transparent material, and I
print upon it, from the original stone or plate containing the design, and I retain this
printed sheet until copies are required when I transfer the design upon it to the
surface of a stone or other suitable support. For printed or lithographed compositions
or designs, I make the print upon paper coated with a gelatinous layer, and I then
pass it through a bath of solution of bichromate of potash or other suitable bichro-
mate having the property of rendering gelatine insoluble, and I dry the sheet, expose
it to the light, then soak it in water until the parts forming the original design
completely disappear, then dry it, and treat it as a photographic negative. Or,
instead of the process just described, the design may be put upon a sheet of paper
coated with bichromated gelatine, thon exposed to light, developed in water, dried,
and then treated as a photographic negative. The gelatinized paper may be replaced
by any other kind of sensitized paper capable of giving a negative in the same way.
Or, the design may be printed upon a sheet of paper with gelatinous or mucilaginous
ink the sheet being then placed face downwards upon a surface of stone or zinc
well covered with black ink, and passed through a press, the print being then dried
and developed in water, a negative being thus obtained from which proofs can be
produced.
By writing upon ordinary paper with ink of the same kind, and treating the sheet
in the way just described a facsimile negative is obtained from which proofs can be
obtained in the same way; or, the same result may be obtained by damping the sheet
of paper between several sheets of damp blotting paper, copying the writing upon it,
drying it, and treating it with oil, placing it upon stone, washing and removing the
sheet, which can be used as a negative.
Or, a negative may be obtained by writing directly upon the paper or other
material with mucilaginous ink slightly acidulated, treating the surface with greasy
matter, then washing and inking the surface, and printing from it.
Or, a sheet of glass or paper may be coated with white varnish, the print or sheet
carrying the design being laid in contact with the varnish, and the other side of the
paper support being oiled, the whole is then soaked in water, and a positive is obtained
from which a negative may be made in the manner already described.
Dated this 26th day of February 1889.
EDWARDS & Co.,
35, Southampton Buildings, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Processes for Reproducing Pictures and Designs.
I, HENRI JULES LE BOULCH, of Versailles, in the Republic of France, do hereby
declare the nature of this invention and in what mannor the same is to be performed
to be particularly described and ascertained in and by the following statement (that
is to say):-
--
By my invention a simple sheet of paper is used in place of stones, or copper or

page_text: other plates ordinarily used for the reproduction and multiplication of designs of
different sorts, such stones or plates only being required to obtain in the first instance
the design upon the simple sheet of paper.
I take a sheet of transparent paper or other sufficiently transparent material, and
I print upon it from the original stone or plate containing the design, and I retain
this printed sheet until copies are required when I transfer the design upon it to the
surface of a stone or other suitable support. For printed or lithographed composition
or designs, I make the print upon paper coated with a gelatinous layer, and I then
pass it through a bath of solution of bichromate of potash or other suitable bichromate
having the property of rendering gelatine insoluble, and I dry the sheet, expose it to
light, then soak it in water until the parts forming the original design completely
disappear, then dry it, and treat it as a photographic negative. Or, instead of the
process just described, the design may be put upon a sheet of paper coated with
bichromated gelatine, then exposed to light, developed in water, dried, and then treated
as a photographic negative. The gelatinized paper may be replaced by any other
kind of sensitized paper capable of giving a negative in the same way.
Or the design may be printed upon a sheet of paper with gelatinous or mucilaginous
ink the sheet being then placed face downward upon a surface of stone or zinc well
covered with black ink which adheres to all the sheet except the gelatinous or
mucilaginous design, and passed through a press, the print being then dried and
developed in water the gelatinous or mucilaginous design being washed away, and a
negative being thus obtained from which proofs can be produced.
By writing upon ordinary paper with ink of the same kind and treating the sheet
in the way just described a facsimile negative is obtained from which proofs can be
obtained in the same way.
Or, a negative may be obtained by writing directly upon the paper or other material
with gelatinous or mucilaginous ink slightly acidulated, treating the surface with
greasy matter, then washing and inking the surface, and printing from it.
Or, a sheet of glass or paper may be coated with white varnish the print or sheet
carrying the design being laid in contact with the varnish, and the other side of the
paper support being oiled, the whole is then soaked in water, and a positive is obtained
from which a negative may be made in the manner already described.
Having now particularly described and ascertained the nature of my said Inven-
tion, and in what manner the same is to be performed, I declare that what 1
claim is :-
The methods of reproducing pictures and other designs substantially as described.
Dated this 27th day of December 1889.
35, Southampton Buildings, London, W.C., Agents for the Inventor.