A NEW EFFECT OF LIGHT AND SHADOW, IMITATING A BRUSH OR STUMP DRAWING, OR BOTH COMBINED; PRODUCED ON PAPER, BEING AN IMPRESSION PROM A PLATE OR STONE, PREPARED IN A PARTICULAR MANNER FOR THAT PURPOSE, AS ALSO THE MODE OF PREPARING THE SAID PLATE
Year: 1840

page_text: HULLMANDEL'S SPECIFICATION, AND DISCLAIMER
AND MEMORANDUM OF ALTERATION.
SPECIFICATION.
TO ALL TO WHOM THESE PRESENTS SHALL COME; I; CHARLES
JOSEPH HULLMANDEL, of No. 49, Great Marlborough Street, in the County of
Middlesex, Lithographic Printer, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria; by Her
Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Fifth day of November, in the fourth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me; the said
Charles Joseph Hullmandel, Her especial licence that I, the said Charles
Joseph Hullmandel, my exors, admors, and assigns, or such others as I, the
said Charles Joseph Hullmandel, my. exors, admors, or assigns; should at
any time agree with, and no others, from time to time and at all times
during the term of years therein expressed, should and lawfully might make,
use, exercise, and vend, within England, Wales, and the Town of Berwick-
upon-Tweed, my Invention of "A NEW EFFECT OF LIGHT AND SHADOW,
IMITATING A BRUSH OR STUMP DRAWING, OR BOTH COMBINED; PRODUCED ON PAPER,
BEING AN IMPRESSION PROM A PLATE OR STONE, PREPARED IN A PARTICULAR
MANNER FOR THAT PURPOSE, AS ALSO THE MODE OF PREPARING THE SAID PLATE

page_text: OR STONE FOR THAT OBJECT;" in which said Letters Patent is contained a
proviso obliging me, the said Charles Joseph Hullmandel, by an instrument
in writing under my hand and seal, particularly to describe and ascertain
the nature of my said Invention, and in what manner the same is to be
performed, and to cause the same to be inrolled in Her said Majesty's
High Court of Chancery within four calendar months next and immediately
after the date of the said in part recited Letters Patent, as in and by
the same, reference being thereunto had, will more fully and at large
appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Charles Joseph Hullmandel, do hereby declare the nature of my said Inven-
tion to consist in a New Effect of Light and Shadow, or impression obtained
by so preparing a plate or stone on which a Drawing has been made with a
brush or with a hair pencil, or with a stump, or with any of these combined,
that it will yield clear and satisfactory impressions, and also in the etching of
the said plate or stone for that purpose, after the Drawing has been completed
upon the same.
And in further compliance with the said proviso I, the said
Charles Joseph Hullmandel, do hereby describe the manner in which my
said Invention is to be performed by the following statement thereof, that
.
is to say:-
The object of my Invention is to obtain clear and satisfactory impressions
from Drawings made on plates or stones with the brush, or cement, or.
sable hair pencil, as well as with the stump, such Drawings heretofore not
having been made to yield good and clear impressions. For this, purpose the
plate or stone is first grained, as for a chalk drawing, a polished stone may be
used, but a grained stone is more pleasant to work on. The drawing being
completed on the plate or stone with ordinary lithographic ink dissolved in
water, and with the use of a brush or a hair pencil, or with the stump, or with
any of these styles mixed, it is prepared with acid, as is usually done with
chalk drawings. After the drawing is thus prepared with acid as aforesaid,
and well dried, the plate or stone is placed in an inclined position, and a
solution of resin in a volatile solvent, such as is generally used in aquatinting,
is poured over the whole drawing. As the solvent evaporates, the resin
cracks or extracts in the usual way, just as is the case in laying a ground
upon a polished copper or steel plate previous to engraving a subject in
aquatint. The drawing which is underneath is therefore protected where
the resinous particles adhere to the plate or stone, while the portions of the
plate or stone which are in the cracks or between the portions of resin are
exposed and unprotected. When this ground is well dried I warm the plate

page_text: or stone gently before a fire, in order to fix the resin well on the drawing;
I then throw over the whole surface of the plate or stone, in order to etch it
in those parts not protected by the ground, a very strong mixture of nitric or
muriatic acid (or of any acid, which will act strongly on lithographic plates or
stones) and gum water, and allow it to act for about a minute. The propor-
tion I usually employ is six parts of gum water, to one of nitric acid. The
ground and the drawing are then washed off with spirits of turpentine, and
the plate or stone is ready for printing. The ground which I have used with
most success is composed of common pitch, one fourth of an ounce, rosin four
ounces and a half, mixed with one quart of strong spirits of wine; the
above must be left to dissolve for three days previous to use, and strained.
Now whereas it is evident that the new preparation aforesaid of the said plate
or stone may be performed before or after the ordinary process of washing off
the drawing is accomplished; and whereas I am aware that many resinous and
other coverings have been heretofore put on plates or stones for various experi-
ments in printing impressions in various styles, but never for the object of etching
the plate or stone after the drawing has been made, in order to make such a
drawing print clear and well, and which is attained by my Invention; and
whereas various coverings, resinous or of other descriptions, may be found to
answer the purpose of my said Invention; and whereas I do not claim as
my Invention the executing of a drawing on a plate or stone with a brush or
hair pencil and lithographic ink, or with a stump or any combination of
the same, as this has often been attempted before; but whereas I claim
as my Invention the impression or new effect of light and shadow produced
from a drawing so executed on a plate or stone aforesaid, when prepared
for printing, by etching after the drawing has been made as aforesaid
and also, I claim the preparing the said plate or stone after the drawing has
been made, by covering it with any suitable ground that will admit by volati-
lazation, and consequent cracking, or by other removal of portions of the said
ground, the action of the acid for the purpose of etching or biting it;
and I further claim the etching or biting of it as aforesaid, after the drawing
has been made for the purpose of obtaining such impression as aforesaid;
and such my Invention being, to the best of my knowledge and belief, entirely
new, and never before used within that part of Ier said Majesty's Unite!
Kingdom of Great Britain and Ireland called England, Iler said Dominion
of Wales, or Town of Berwick-upon-Tweed; I do hereby declare this to be my
Specification of the same, and that I do verily believe this my Specification
doth comply in all respects, fully and without reserve or disguise, with the
proviso in the said herein-before in part recited Letters Patent contained :

page_text: CHARLES JOSEPH (L.s.) HULLMANDEL.
AND BE IT REMEMBERED, that- on the Sixteenth day of February,
in the year of our Lord 1841, the aforesaid Charles Joseph Hullmandel came
before our said Lady the Queen in Her Chancery, and acknowledged the Specifi-
cation aforesaid, and all and every thing therein contained and specified, in
form above written. And also the Specification aforesaid was stamped according
the tenor of the Statute. made for that purpose.
Inrolled the Second day of March, in the year of our Lord One
thousand eight hundred and forty-one.

page_text: r the Matter of Letters Patent granted' to Charles Joseph Hullmandel,
of No. 49, Great Marlborough Street, in the County of Middlesex,
Lithographic Printer, for his Invention of "A NEW EFFECT OF LIGHT
AND SHADOW, IMITATING A BRUSH OR STUMP DRAWING, OR BOTH 'COMBINED;
PRODUCED ON PAPER, BEING AN IMPRESSION FROM A PLATE OR STONE
PREPARED IN A PARTICULAR MANNER FOR THAT PURPOSE, AS ALSO THE
MODE OF PREPARING THE. SAID. PLATE OR. STONE. FOR. THAT. OBJECT," and
bearing date at Westminster,. the. Fifth day of November, One
thousand eight hundred and forty.
DISCLAIMER AND MEMORANDUM OF ALTERATION entered
by the said Charles Joseph Hullmandel, pursuant to the provisions of an
Act passed in the fifth and sixth years of the reign of His late Majesty
King William the Fourth, intituled "An Act to amend the Eaw touching
Letters Patent for Inventions."
I,, the said Charles Joseph Hullmandel,, do hereby declare that, since: the.
enrollment of the Specification of my; said. Invention I have been advised that
it is, doubtful, whether the word "plate," used. as. synonimous with. the word
stone,, is.a. correct. application of the: word plate.;, andt for this reason .I, the:sail
Charles: Joseph. Hullmandel,, do hereby disclaim. the words "plate or."
wherever they occur before the word "stone" in the title of the said: Letters
Patent, and in the Specification. of the said Invention.. And: I do hereby further:
disclaim, the words," plates.or." wherever they occur before, the: words "stones"
in the said. Specification.. And: I, the said Charles. Joseph Hullmandel,. do:
hereby further declare that since. the enrollment of the said Specification. I
have discovered that I have committed. a, mistake in one of the recitals!
contained in the said Specification, where it is stated that the new preparation
may be performed before or after the process. of. washing; off the drawing,
whereas it can only be performed before the washing off of the drawing. And
for this reason J, the said Charles Joseph Hullmandel, do hereby disclaim

page_text: the following words in the said Specification; that is to say, "It is evident
that the new preparation aforesaid of the said plate or stone may be per-
"formed before or after the ordinary process of washing off the drawing is
accomplished; and whercas." And I, the said Charles Joseph Hullmandel,
do hereby further declare that since the enrollment of the said Specification
I have been advised that the words "etching and biting" are used as appli-
cable to some kinds of engraving in a sense in which they are not intended
to be used by me as applied to the new style of art called litho-tint, to which
the said Letters Patent refer. And for this reason I, the said Charles Joseph
Hullmandel, do hereby make the following alterations in the said Specification;
that is to say, I introduce the words "what I call" immediately before the
word "etch" in the said Specification, and also immediately before the word
etching," wherever it occurs in the said Specification.
In witness whereof, I have hereunto set my hand and seal, this Twenty-
fourth day of May, One thousand eight hundred and forty-two.
CHARLES JOSEPH HULLMANDEL. (L.S.)
To the Clerk of the Patents of England.
This is to certify that the above-named Charles Joseph Hullmandel, of
No. 49, Great Marlborough Street, in the County of Middlesex, Lithographic
Printer, has applied to me for leave to enter with you the above-written
Disclaimer & Memorandum of Alteration of part of the Title and Specifi-
cation of a certain Invention, for which Letters Patent were duly granted to
him, and dated at Westminster, the Fifth day of November, One thousand
eight hundred and forty. And having considered the said application, and that
the said Charles Joseph Hullmandel had advertized the said Disclaimer and
Memorandum of Alteration in the London Gazette, and in the Times &
Morning Chronicle Newspapers, and no objection having been made to the
said application, I have accordingly granted leave to the said Charles Joseph
Hullmandel to file his said Disclaimer and Memorandum of Alteration, pur-
suant to the Statute passed in the fifth and sixth years of the reign of His
late Majesty King William the Fourth, intituled "An Act to amend the Law
touching Letters Patent for Inventions.""

page_text: AND BE IT REMEMBERED, that on the Twenty-fourth day of May,
in the year of our Lord 1842, the aforesaid Charles Joseph Hullmandel came
before our said Lady the Queen in Her Chancery, and acknowledged the
Disclaimer aforesaid, and all and every thing therein contained and specified
in form above written. And also the Disclaimer aforesaid was stamped
according to the tenor of the Statute made for that purpose.
AND BE IT REMEMBERED, that on the Twenty-fourth day of May,
in the year of our Lord 1842, the aforesaid Charles Joseph Hullmandel came
before our said Lady the Queen in Her Chancery, and acknowledged the
Disclaimer aforesaid, and all and every thing therein contained and specified
in form above written. And also the Disclaimer aforesaid was stamped
according to the tenor of the Statute made for that purpose.
Inrolled the Twenty-fifth day of May, in the year of our Lord One
thousand eight hundred and forty-two.