IMPROVEMENTS IN PRINTING FROM SURFACES WITH CERTAIN CHEMICAL COMBINATIONS FOR PREVENTING FRAUD
Year: 1871

page_text: LETTERS PATENT to Hilary Nicholas Nissen, of Mark Lane, in the.
City of London, Engraver and Stationer, for the Invention of
"IMPROVEMENTS IN PRINTING FROM SURFACES WITH CERTAIN CHEMICAL
COMBINATIONS FOR PREVENTING FRAUD."
Sealed the 5th March 1872, and dated the 16th September 1871:
PROVISIONAL SPECIFICATION left by the said Hilary Nicholas
Nissen at the Office of the Commissioners of Patents, with his
Petition, on the 16th September 1871.
I, HILARY NICHOLAS NISSEN, of Mark Lane, in the City of London,
5 Engraver and Stationer, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN PRINTING FROM SURFACES WITH CERTAIN
CHEMICAL COMBINATIONS FOR PREVENTING FRAUD," to be as follows :—
This Invention relates to the employment of certain ingredients to be
used in printing from surfaces, which ingredients. when placed in
combination with the usual writing inks of commerce in which iron is
present will on any attempt being made to extract such writing ink

page_text: from the surface of paper, parchment, or other material by oxalic acid
or other ink discharging chemical agent become changed both in
colour and composition, and thereby indicate that an attempt has been
made.
The Invention consists in combining with the inks of commerce in
which iron is present ferro-rubigo and ferro-cyanide of potassium in
suitable quantities, say from one to ten per cent., which substances
amalgamate with the iron in the ink and enable it to be transformed
into Prussian blue upon the application of oxalic acid or other ink
extracting chemical agent thereto.
.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Hilary Nicholas Nissen in the Great Seal Patent
Office on the 16th March 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HILARY
NICHOLAS NISSEN, of Mark Lane, in the City of London, Engraver and
Stationer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Sixteenth day of September, in the
year of our Lord One thousand eight hundred and seventy-one, in the
thirty-fifth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Hilary Nicholas Nissen, Her special
licence that I, the said Hilary Nicholas Nissen, my executors, adminis-
trators, and assigns, or such others as I, the said Hilary Nicholas
Nissen, my executors, 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 "
5 IMPROVEMENTS IN PRINTING FROM SURFACES WITH CERTAIN CHEMICAL
COMBINATIONS FOR PREVENTING Fraud,” upon the condition (amongst others)
that I, the said Hilary Nicholas Nissen, my executors or adminis-
trators, 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 per-

page_text: formed, and cause the same to be filed in the Great Seal Patent Office
within six calendar months next and immediately after the date of
the said Letters Patent.
NOW KNOW YE, that I, the said Hilary Nicholas Nissen, do hereby
declare the nature of my said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement thereof, that is to say :—
This Invention or discovery relates to the employment of certain
ingredients to be used in printing from surfaces, which ingredients when
placed in combination with the usual writing inks of commerce in
which iron is present will on any attempt being made to extract
such writing ink from the surface of paper, parchment, or other material
by oxalic acid or other ink discharging chemical agent become changed
both in colour and composition, and thereby indicate that such attempt
has been made.
The Invention consists in combining with the inks of commerce in
which iron is present ferro-rubigo and ferro-cyanide of potassium in
suitable quantities, say from one to ten per cent., which substances
amalgamate with the iron in the ink, and enable it to be transformed
into Prussian blue upon the application of oxalic acid or other ink.
extracting chemical agent thereto.
I therefore claim as my Invention, the employment of ferro-rubigo
and frerro-cyanide of potassium for the purposes set forth.
In witness whereof, I, the said Hilary Nicholas Nissen, have
hereunto set my hand and seal, this Sixteenth day of March
One thousand eight hundred and seventy-two.
HILARY NICHOLAS NISSEN. (L.S.)