Year: 1886

page_text: Date of Application, 14th Apr., 1886.
Complete Left, 12th Jan., 1887.
Complete Accepted, 15th Feb., 1887.
Photography.
EDWARD WILLIAM FOXLEE 22 Goldsmith Road Acion W. Photographer, do hereby
declare the nature of this invention to be as follows:-
My invention relates to that method of producing Photographically Engraved
Plates, for Intaglio Printing, known as the Waterhouse Process. This process is
described in "The British Journal of Photography," and "The Photographic News,"
for November 26th 1880. Briefly it consists in producing a photographic image, in
gelatine, on a silvered copper plate, after the manner of carbon printing. Then,
while the gelatine is still wet, it is dusted over with powdered glass, sand, emery, or
other gritty material which has previously been treated with wax, stearine, or other
similar substance. After the gelatine is dry, the gritty particles, which have embedded
The grained
themselves in it, are removed by brushing, or other mechanical means.
image thus obtained is then treated with plumbago and an electrotype made from it.
This electrotype forms the printing plate from which impressions are obtained in the
copper plate press. In practice it is found very difficult to remove the gritty matter
without injuring the delicacy and sharpness of the grain it has produced, and it is the
crispness of this grain which gives the ink-holding property to the finished plate If
any of the gritty particles remain in the gelatine they destroy the evenness of the
grain, and interfere with the after deposition of the copper in the electrotyping
operation.
My invention consists of substituting for the powdered glass, sand, emery, or
similar material, which have to be removed mechanically, powdered resins, resinous
gums, asphaltum and analogous substances which are insoluble in water, but soluble
in suitable menstruums, such as alcohol, benzol, naphtha, turpentine, etc., according to
the resins or resinous gums employed. By my improved method the grain-forming
material is removed from the gelatine film by solution, instead of by mechanical
means, so that the difficulty of entirely removing it is overcome, and the risk of
injury to the grain, by abrasion, is avoided.
-ורד ו-་-A
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page_text: An Improved Method of Producing Printing Surfaces by
Photography.
EDWARD WILLIAM FOXLEE 22 Goldsmith Road Acton W. Middlesex Photographer
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
My invention relates to that method of producing photographically engraved plates
for intaglio printing, known as the "Waterhouse Process. This process is described
in the British Journal of Photography," and in the "Photographic News" for
November 26th 1880. Briefly it consists in producing a photographic image in
gelatine on a silvered copper plate after the manner of carbon printing. Then, while
the gelatine is still wet, it is dusted over with powdered glass, sand, emery, or other
gritty material, which has previously been treated with wax, stearine, or other similar
substance. After the gelatine is dry the gritty particles, which have imbedded them-
selves in it, are removed by brushing or other mechanical means. The grained image
thus obtained is then treated with plumbago and an electrotype made from it. This
electrotype forms the printing plate from which impressions are obtained in the copper
plate press. In practice it is found very difficult to remove the gritty matter without
injuring the delicacy and sharpness of grain it has produced, and it is the crispness
of this grain that gives the ink holding property to the finished plate. Further if
any of the gritty particles remain in the gelatine they destroy the evenness of the
grain and interfere with the deposition of the copper in the electrotyping operation.
My invention consists of substituting for the powdered glass, sand, emery, or
similar materials, which have to be removed mechanically, powdered resins, resinous
gums, asphaltum and analogous substances which are insoluble in water but soluble in
suitable menstruums such as alcohol, ether, benzol, naphtha, turpentine, mineral oils
etc, according to the resins or resinous gumis employed. In my improved method the
grain producing material is removed from the gelatine film by solution instead of by
mechanical means so that risk of injury to the grain by abrasion is avoided.
My invention is carried out as follows. An image in pigmented gelatine, from a
photographic negative is developed upon a copper plate, either silvered or otherwise,
by the usual process of carbon printing. After the print so obtained has drained I
sift over it a resin or resinous gum in a more or less fine state of division, according
to the grain required, and then allow it to dry. The gelatine image may next be
rendered insoluble by immersing it in a solution of alum, sulphate of alumina, or
their analogues and again dried, or the gelatine may be made insoluble by treating it
while still wet, and before applying the grain forming material, with one of the a
alkaline bichromates and after drying exposing it to the action of light. When the

page_text: gelatine has been made insoluble the plate is immersed in a solvent of the resin or
resinous gum employed. Thus if sandarac be used then I prefer alcohol as a solvent.
If dammar or bitumen, benzol, and other resins or resinous gums according to their
solvents. After the resin has been dissolved the plate is further rinsed with the
solvent and dried. The gelatine is then coated with plumbago and electrotyped in the
ordinary manner.
Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed, I declare that what I claim is:
The use of resins, resinous gums, bitumen and similar substances, which are
insoluble in water, for producing a grain on the gelatine image, and afterwards
removing them by solution, substantially as described, in place of the sand or other
gritty matter, hitherto used, and which has to be removed mechanically.
EDWARD WILLIAM FOXLEE.