Improvements in or applicable to the Frocess of Printing Pictures.
Year: 1897

page_text: Date of Application, 21st Oct., 1897--Accepted, 11th Dec.,
1897
COMPLETE SPECIFICATION.
Improvements in or applicable to the Frocess of Printing Pictures.
We HENRY HAMMOND LIGHT, Junior, Printer, and JOHN ARTHUR HOYLE,
Printer, both of 14 Brown Street, Manchester, 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..
cur
Our said invention relates to improvements in or applicable to the production
of pictures to simulate etchings.
In the ordinary process of producing etchings the design is sunk in the plate
and the lines thereof having been charged with ink a sheet of paper is placed in
intimate contact therewith and then withdrawn or pulled from the plate. In the
finished picture the lines thereof stand in apparent relief above the surface of the
paper and the picture itself is surrounded by an impression known as the plate-
mark of the edges of the plate from which it is printed.
This relief of the lines distinguishes a picture produced by means of an etched
plate from a print produced by purely surface printing such as lithography.
Such a process is however necessarily slow owing to the nature of the process and
the care which has to be exercised in applying and taking off the print.
According to our said invention we obtain the apparent relief of the lines of
the picture by first producing a surface print without relief by any known process
such as lithography either in various shades of mono-chrome or in colours by one
or more printings.
In order to impart relief to the lines we prepare a plate or slab by engraving
etching or otherwise in which lines corresponding to some or all of the lines of
the surface print are sunk below the surface. No ink is applied to this plate or
slab which simply serves as a die. To this uninked die plate the surface print is
applied by the aid of register marks or other suitable means so that the lines in
the picture to which relief is to be given correspond with the sunk lines in the
die plate. The whole is then subjected to pressure when the lines of the surface
print corresponding to the depressions in the die plate will have imparted to them
an apparent relief similar to that of an etching.
In order to ensure greater penetration into the lines of the die plate and thus
to produce a greater apparent relief we in some cases use a matrix plate having
lines in relief corresponding to the sunk lines of the die. Such a matrix is
placed behind the sheet to be printed while the impression is being made.
Such a matrix plate may be flat or cylindrical according to the kind of press
to be used in the operation. It may be of leather indiarubber paper metal or
other suitable material and may be produced by etching engraving or otherwise.
A convenient way of producing such a matrix plate is to apply a sheet of paper
leather or other material adapted for the purpose direct to the die plate and to
leave both under pressure for some time. The sheet when withdrawn is suitably
mounted on a rigid support.
The die plate is in some cases mounted on another plate or block in which case
the edges of the die plate form a plate-mark on the sheet applied thereto, or to

page_text: produce the same effect, part of the margin of the die plate may be removed by
etching or otherwise so as to leave a raised surface to form a plate mark.
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. The process of producing pictures with lines in relief substantially as
hereinbefore described.
2. The process of producing pictures to simulate etchings by first making a
surface print and subsequently applying the same under pressure to an uninked
die plate having sunk lines corresponding to those lines of the surface print to
which relief is to be imparted substantially as described.
3. The process of producing pictures to simulate etchings by first making a
suface print and subsequently subjecting the same to pressure between an uninked
die plate having sunk lines corresponding to those lines of the print to which
relief is to be imparted and a matrix plate or sheet having corresponding raised
lines, substantially as described.
4A picture or print having lines in relief produced by pressure against an
uninked die plate having sunk lines corresponding to lines in a surface print
substantially as..described.
02
P
100%
E. T. WHITELOW, A.M Inst C E
70 Deansgate, Manchester Agent for the Applicants.