Year: 1886

page_text: Date of Application, 11th Dec., 1886.
Complete Left, 7th Sept., 1887
Complete Accepted, 7th Oct., 1887.
We, GEORGE HErbert Bolland, Lieutenant Colonel, Royal Engineers, of 7 Cran-
bury Terrace, Southampton, and MATTHEW HENRY PHINEAS RIALL SANKEY, Captain,
Royal Engineers, of Bawnmore, Bannisters Park, Southampton, do hereby declare the
nature of this invention to be as follows:-
Our Invention relates to Mezzotint Engraving, and it is designed to effect the
same more economically than hitherto, and in such a manner that the Artist can
see the depth of mezzotint as and when he is applying it, and thus produce perfect
results.
Our Invention is applicable in two ways; in the first place, to a Copper plate already
engraved or etched, and which requires to be shaded by mezzotint; and in the second
place, to a plain copper plate without any previous dry point or etched work.
In the first place a copper matrix of the engraved or etched copper plate is made
by the electro type process and is then silvered. In the second case a blank copper
plate is properly polished and silvered.
The mezzotint in either case is then built up on the silvered copper plate by a
multitude of very fine dots, produced by a spray producing instrument, diffusing a
suitable adhesive liquid holding in suspension a finely powdered or divided solid. The
deeper the mezzotint is to be, the longer must the spray be applied, causing the dots
to be closer and more numerous, and, in fact, the depth of tint produced by the built
up dots on the silvered plate will be the same as the depth of tint on the copper
plate impression, so that the Artist can actually see the depth of tint he is
applying.
The matrix thus formed is then placed in an electro depositing tank, and a negative
obtained in the usual way, which forms the printing plate, the raised dots thus
producing corresponding depressions in the surface of the Copper electro type which
is to hold the ink.
10 0.
FELL & WILDING,
1, Queen Victoria Street, London, E.C..
Agents for the Applicants,

page_text: We, GEORGE HERBERT BOLLAND, Lieutenant Colonel, Royal Engineers, of
7 Cranbury Terrace, Southampton, and MATTHEW HENRY PHINEAS RIALL SANKEY,
Captain, Royal Engineers, of Bawnmore, Banister Park, Southampton, 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
Our invention relates to mezzotint engraving, and it is designed to effect the samo
more economically than hitherto, and in such a manner that the artist can see
the depth of mezzotint as and when he is applying it, and thus produce perfect
results.
Our invention is applicable in two ways, in the first place, to a copper plate
already engraved or etched, and which requires to be shaded by mezzotint; and
in the second, to a plain copper plate without any previous dry point or etched
work.
In the first place, a copper matrix of the engraved or etched copper plate is made
by the electrotype process and is then silvered."
In the second case, a blank copper plate is properly polished and silvered.
The mezzotint in either case is then built up on the silvered copper plate by a
multitude of very fine dots produced by a spray-producing instrument, diffusing
suitable adhesive liquid holding in suspension a finely powdered or divided solid.
a
The deeper the mezzotint is to be, the longer must the spray be applied, causing
the dots to be closer and more numerous, and in fact, the depth of tint produced by
the built up dots on the silvered plate will be the same as the depth of tint on the
copper plate impression, so that the artist can actually see the depth of tint he is
applying.
The matrix thus formed is then placed in an electro-depositing tank, and a negative
obtained in the usual way, which forms the printing plate, the raised dots thus
producing corresponding minute holes in the surface of the copper electrotype, which
holes retain the ink.

page_text: Having now particularly described and ascertained the nature of our said
Invention, and in what manner the same is to be performed, we declare that what
we claim is:
(1) To produce on the matrix of a previously engraved or etched copper plate, or
on a blank copper plate, a mezzotint shaded drawing by means of a multitude of
small dots.
(2) To produce a conner plate of the above (suitable for copper plate printing) by
the electrotype process.
Dated this 5th day of September 1887.
G. HERBT. BOLLAND, Lt. Col. R.E.
MATTHEW HENRY PHINEAS RIALL SANKEY,
Capt. R. Engineers.