AN IMPROVED PHOTO-ELECTROTYPING PROCESS AND STOPPING-OUT PLATE TO BE USED THEREFOR, AND FOR OTHER SIMILAR PURPOSES
Year: 1871

page_text: LETTERS PATENT to George Haseltine, of the "International Patent
Office," Southampton Buildings, London, for the Invention of
66
"AN IMPROVED PHOTO-ELECTROTYPING PROCESS AND STOPPING-OUT PLATE
TO BE USED THEREFOR, AND FOR OTHER SIMILAR PURPOSES."-A commu-
nication from abroad by William Augustus Leggo, of Montreal,
Canada, Gentleman.
Sealed the 22nd August 1871, and dated the 28th February 1871.
PROVISIONAL SPECIFICATION left by the said George Haseltine at
the Office of the Commissioners of Patents, with his Petition, on
the 28th February 1871.
I, GEORGE HASELTINE, of the "International Patent Office," South-
ampton Buildings, London, do hereby declare the nature of the said
Invention for "AN IMPROVED PHOTO-ELECTROTYPING PROCESS AND STOPPING-
OUT PLATE TO BE USED THEREFOR, AND FOR OTHER SIMILAR PURPOSES," a com-
munication, to be as follows :—
It may be well here to remark that Letters Patent have already
been obtained bearing date the 5th day of. Junc, A.D. 1865, No. 1541

page_text: for the photo-electrotyping process commonly termed "Leggo-typing,"
and this Invention relates to further improvements therein, and to the
manufacture of a stopping-out plate used therefor, which will also
be found useful in photographing generally, and for other similar
purposes.
After the photograph has been varnished and dried, as described in
the Specification of the said foriner Patent, it is rubbed carefully with
a piece of fine cotton wool or other suitable substance, giving it a fine
polish or gloss. It is now ready to receive the gelatino coating applied
cold. The exposure to light is now made, this, together with the
application of the gelatine coating being performed in the same manner
as described in the said former Specification, and washed, as therein
stated, first in hot and then in cold water. I now soak it a short time
in a saturated solution of hyposulphite of soda or its equivalent for the
purpose of removing a certain softness that exists in the jelly mould
and making it sharp. The soda is now thoroughly removed by washing
in cold water. If no further deepening is required it may now be
soaked in a solution of proto-sulphate of iron or its equivalent to
prevent adhesion between the gelatine portions of the picture and the
plaster cast, this in its turn is removed by washing again in cold
water. The plaster cast is now taken in the manner described in the
aforesaid former Specification. It is very seldom indeed, however, that
this first treatment in the above manner gives all the depth required,
but any further amount of depth necessary may be obtained by further
applications of sensitive jelly, with exposures to light, and further
manipulation, as follows :—
After the plate has been as before described treated with the first
application of gelatine, exposure to light, and washings in water and
soda and water again, it is soaked for a short time in diluted nitric acid
or its equivalent, this having the effect of removing the yellow colour of
the mould, making it transparent, and allowing the rays of light to reach
freely and act upon the second coating. This acid is in turn removed
by again washing with cold water. All superfluous moisturo is now
removed from the surface of the mould by blotting paper, or in any
other suitable manner. A second application of a sensitized compound
(bichromate of potash 1 part, gelatine 8 parts, water 80 parts), or its
equivalent may now be made and treated as in the first instance, with
this difference only, that in this case it is applied warm.
A third appli-

page_text: cation of jelly may be made in the same manner should the requisite
depth not have been attained, but this will very rarely be required.
In exposing these further applications of the sensitive coating to the
action of light stopping-out plates are of the greatest importance.
The manner in which I make them is as follows:-From the positive
photograph intended to be "Leggo-typed" a negative is made by placing
in a dark room the positive in front of a sensitive collodion plate in such
a position that the rays of light admitted through any aperture must
pass through the positive before striking the sensitive collodion plate.
The two films being opposed to cach other light is admitted and an
exposure (preferably short) given. This resulting negative is used in
exactly the same manner with a second sensitive collodion film, and a
full exposure given. This second plate or stopping-out plate is a soft
blurred looking copy of the original, and it is utilized by placing it over
the jellied positive during exposure to prevent the light from acting too
strongly upon the design itself or certain portions of it as desired, while
other portions of it are being acted forcibly upon. Stopping-out plates
of a different kind may be sometimes used, they are made by hand by
painting or dabbing colour or any substance upon glass to render it
non-transparent, or any suitable dark or opaque substances suitably
arranged to stop out the light not required may be used as stopping-out
plates.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said George Haseltine in the Great Seal Patent Office
on the 26th August 1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
HASELTINE, of the "International Patent Office," Southampton Buildings,
London, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-eighth day of February, in
the year of our Lord One thousand eight hundred and seventy-one, in
the thirty-fourth year of Her reign, did, for Herself, Ier heirs and suc-
cessors, give and grant unto me, the said George Haseltine, Her special
licence that I, the said George Haseltine, my executors, administrators,
and assigns, or such others as I, the said George Haseltine, my executors,

page_text: administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise,
and vend, within the United Kingdom of Great Britain, and Ireland,
the Channel Islands, and Isle of Man, an Invention for "AN IMPROVED
PHOTO-ELECTROTYPING PROCESS AND STOPPING-OUT PLATE TO BE USED THEREFOR,
AND FOR OTHER SIMILAR PURPOSES," a communication to me from abroad
by William Augustus Leggo, of Montreal, Canada, Gentleman, upon
the condition (amongst others), that I, the said George Haseltine, my
executors or administrators, by an instrument in writing under my,
or their, or one of their hands and seals, should particularly describe
and ascertain the nature of the said Invention, and in what manner
the same was to be performed, and cause the same to be filed in the
Great Seal Patent Office within six calendar months next and imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said George Haseltine, do hereby declare
the nature of the said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by tho
following statement :—
It may be well here to remark that Letters Patent have already been
obtained bearing date the Fifth day of June, A.D. 1865, No. 15:11, for
the photo-electrotyping process commonly termed "Leggo-typing" and
this Invention relates to further improvements therein, and to the
manufacture of a stopping-out plate used therefor which will also be
found useful in photographing generally, and other similar purposes.
After the photograph has been varnished and dried, as described in
the Specification of the said former Patent, it is rubbed carefully with
a piece of fine cotton wool or other suitable substance, giving it a fino
polish or gloss. It is now ready to receive the gelatine coating applied
cold. The exposure to light is now made, this, together with the appli-
cation of the gelatine coating, being performed in the same manner as
described in the said former Specification and washed as therein stated
first in hot and then in cold water. I now soak it a short time in a
saturated solution of hyposulphite of soda or its equivalent, for the
purpose of removing a certain softness that exists in the jelly mould
and making it sharp. The soda is now thoroughly removed by washing
in cold water. If no further deepening is required it may now be soaked
in a solution of protosulphate of iron or its equivalent, to prevent

page_text: adhesion between the gelatine portions of the picture and the plaster cast;
this in its turn is removed by washing again in cold water. The plaster
cast is now taken in the manner described in the said former Speci-
fication. It is very seldom indeed, however, that this first treatment in
the above manner gives all the depth required, but any further amount
of depth necessary may be obtained by further applications of sensitive
jelly with exposures to light and further manipulation as follows:-
After the plate has been as before described treated with the first
application of gelatine, exposure to light, and washings in water and
soda and water again, it is soaked for a short time in diluted nitric acid
or its equivalent, this having the effect of removing the yellow colour
of the mould, making it transparent, and allowing the rays of light to
reach freely and act upon the second coating. This acid is in turn
removed by again washing with cold water. All superfluous moisture
is now removed from the surface of the mould by blotting paper, or in
any other suitable manner. A second application of a sensitized com-
pound (bichromate of potash 1 part, gelatine 8 parts, and water 80
parts) or its equivalent may now be made, and treated as in the first
instance, with this difference only, that in this case it is applied warm.
A third application of jelly may be made in the same manner should
the requisite depth not have been attained, but this will very rarely
be required.
In exposing these further applications of the sensitive coating to the
action of light stopping-out plates are of the greatest importance. The
manner in which I make them is as follows:-From the positive photo-
graph intended to be "Leggo-typed" a negative is made by placing in
a dark room the positive in front of a sensitive collodion plate in such a
position that the rays of light admitted through any aperture must pass
through the positive before striking the sensitive collodion plate. The
two films being opposed to each other, light is admitted and an ex-
posure (preferably short) given. This resulting negative is used in
exactly the same manner with a second sensitive collodion film and a
full exposure given. This second plate or stopping-out plate is a soft
blurred looking copy of the original, and it is utilized by placing it over
the jellied positive during exposure to prevent the light from acting
too strongly upon the design itself or certain portions of it as desired,
while other portions of it are being acted forcibly upon. Stopping-
out plates of a different kind may be sometimes used; they are made

page_text: by hand, by painting or dabbing colour or any substance upon glass to
render it non-transparent, or any suitable dark or opaque substances
suitably arranged to stop out the light not required may be used as
stopping-out plates.
Having thus fully described the said Invention as communicated to
me by my foreign correspondent and shown how the same may bo
conveniently and advantageously carried into practice I claim,—
First. The operation in the aforesaid so called "Leggo-typing" process
of polishing the photograph substantially in the manner and for the
purpose described.
Second. The use in the said "Leggo-typing" process of hyposulphite
of soda or its equivalent substantially in the manner and for the purpose
described.
Third. The use in the said "Leggo-typing" process of protosulphate
of iron or its equivalent substantially in the manner and for the purpose
described.
Fourth. The reapplication or any number of applications other than
the first of the sensitive gelatinous compound and the corresponding
exposures to the action of light with or without the aid of stopping
out plates substantially in the manner and for the purpose described.
Fifth. The construction and operation of the stopping-out plates
substantially in the manner and for the purpose described.
Sixth. The use in the "Leggo-typing" process of stopping-out plates
of every kind.
In witness whereof, I the said George Haseltine, have hereunto ¦
set my hand and scal, this Twenty-sixth day of August in the
year of our Lord One thousand eight hundred and seventy one.
Witness,
W. J. LOWE.
GEORGE HASELTINE. (L.S.)