IMPROVED MEANS OP PRODUCING SURFACES IN RELIEF OR IN INTAGLIO FOR PRINTING AND OTHER PURPOSES
Year: 1867

page_text: PROVISIONAL SPECIFICATION left by Clinton Edgcumbe Brooman at
the Office of the Commissioners of Patents, with his Petition, on the
1st April 1867.-A communication from abroad by André Adolphe
Disderi, of Paris, France.
I, CLINTON EDGCUMBE BROOMAN, of the Firm of Robertson, Brooman, and
Company, of 166, Fleet Street, in the City of London, Patent Agents, do
hereby declare the nature of the said Invention for "IMPROVED MEANS OP
PRODUCING SURFACES IN RELIEF OR IN INTAGLIO FOR PRINTING AND OTHER
PURPOSES," to be as follows:-
This Invention comprises two distinct features; first, the transformation of
a photographic image into a matrix obtained by galvanoplasty; and, secondly,
the production with this matrix either of impressions with inks of any color
upon paper, textile fabric, glass, ceramic ware, wood, stone, and metal, or of
countertypes in relief or in intaglio on any metal, or of engraved blocks for
printing.
The Invention consists, 1, in obtaining by means of a vehicle, say, albumen,
gelatine, or other analogous body, a coating or layer containing salts which
modify under the action of luminous rays, such as nitrates, chlorides, bichro-
mates, prussiates, and the like, double salts of different metals, gold, silver,
copper, and the like. The said coating or layer gives a proof in relief by
causing to dissolve according to its nature the parts not impressioned by light
by means of water at different temperatures, alcohol, ether, or acids, and thus
leaving bare the parts gradually metallized. This coating or layer obtained

page_text: in relief after the mode of an ordinary photographic negative will give a
positive proof by transparency with the blackest lines in relief and the whitest
in intaglio.
2. In varnishing the contour of the glass bearing this positive proof with
gutta percha in order to avoid damage, in then employing the means ordinarily
adopted in galvanoplasty in order to cause a deposit upon this image of a layer
of gold, silver, copper, or other metal, and to obtain thus a matrix, the hollows
of which will be formed by the black or dark parts and the relief by the
white or light parts. The production of this matrix constitutes the first part
of this Invention; now with the matrix 1 can obtain various artistic and
industrial results which constitute the second part of the Invention.
Firstly, I can cover this matrix with an ink at the ordinary temperature,
and apply it to printing upon glass, wood, stuffs, porcelain, paper, and other
bodies; desiccation takes place; then to detach the image easily from the
matrix, and to leave it adherent to the body applied to receive the impression,
I heat the matrix gently with a spirit lamp. I compound the ink by mixing
therewith ingredients which melt under heat, such as gelatine and the like,
and coloring ingredients to vary the effects; I also add vitrifiable matters if I
wish to print on porcelain and to obtain enamels and the like. Finally, I
can by the processes above described produce impressions on wood, metals,
paper, glass, stuff, stone, plastic substances, and other surfaces.
Secondly, I can submit the matrix to a second galvanic operation to obtain
proofs in relief in gold, silver, copper, or other metals, which besides appear-
ance will give results the most favorable to great preservation; these proofs
can also, by the known typographic processes, serve for printing, as with
engravings in wood or metal.