Iм- PROVEMENTS IN PRINTING IN GOLD, SILVER, BRONZE, AND OTHER METAL ON GLASS
Year: 1858

page_text: LETTERS PATENT to Henry Bauerrichter and Charles Gustavus Gottgetreu,
of Charterhouse Square, in the Liberty of Glasshouse Yard, in the County
of Middlesex, Manufacturers, for the Invention of "IMPROVEMENTS IN
Sealed the 27th July 1858, and dated the 9th April 1858.
PROVISIONAL SPECIFICATION left by the said Henry Bauerrichter and
Charles Gustavus Gottgetreu at the Office of the Commissioners of
Patents, with their Petition, on the 9th April 1858.
We, HENRY BAUERRICHTER and CHARLES GUSTAVUS GOTTGTEREU, of Charter-
house Square, in the Liberty of Glasshouse Yard, in the County of Middlesex,
Manufacturers, do hereby declare the nature of the said Invention for "Iм-
PROVEMENTS IN PRINTING IN GOLD, SILVER, BRONZE, AND OTHER METAL ON GLASS,"
to be as follows:-
Some time since I, Charles Gustavus Gottgetreu, sought and obtained Pro-
visional Protection for a method of "Lithographic Printing in Oil and Varnish
Colours, and Metal on Glass, Wood, Papier Mâché, Marble, Metal, Porcelain,
"or any other Material that offers a suitable Surface," which we failed satis-
factorily to bring to perfection.
We have since made various experiments, and believe we have now dis-
covered the means by which to insure the greatest possible perfection.

page_text: From a drawing on stone or zinc plate we print on a soft thin slightly
sized pulped paper, commonly called tissue paper, with strong varnish mixed
with venetian turpentine. This varnish printing is transferred to glass in the
following manner-We lay the paper carefully on the glass, and press it
gently to it with a wet sponge, then we go over it with a soft roller made
expressly for this purpose. Then we place a number, say, about twenty glasses
thus prepared on one another, with something heavy on the top one, in order
to cause a sufficient pressure to insure the papers adhering well to the glasses.
After being left in this state for about half an hour, the glasses are taken up
again, soft stout paper is rolled on the thin paper in order to absorb moisture
therefrom, and we continue to roll, with a roller such as referred to, until the
thin paper adhering to the glass is quite dry, and all the lines of the drawing
or representation show through the paper. Then the (thin) paper is carefully
pulled off, leaving the varnish printing in great perfection sticking to the glass.
The glass is now covered with leaf metal, gold, silver, or bronze, the rollers
are again gently drawn across, and the glass rubbed with the hand or soft wool,
to remove the metal from the other parts than impressed by the varnish
impression or design.
After this the glass presents the whole drawing or representation in gold,
silver, or other metal, and must be left to dry, which takes, according to the
state of the air, from two to eight and ten days. To dry them by artificial
means is not desirable, as the metal, gold, &c., are almost invariably more or
less tarnished and discolored by doing so. The glass is now ready to be colored.
and coated, if so required.
Glass thus treated may be employed for many ornamental purposes, & espe-
cially for what are commonly called "showboards," or such like advertising
media. And the glass may, if desired, at the same side as the letters or other
device, be covered or partially so by a coating of paint or other coloring
matter, or cloth or other fabric, foil or other paper or material as background.
The roller we employ is constructed from wood, covered first with woollen:
cloth, then with cotton velvet, and for facility of use we, by preference; apply.
it so as to turn freely in an iron fork or frame with a handle.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Henry Bauerrichter and Charles Gustavus Gottgetreu in the
Great Seal Patent Office on the 9th October 1858.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, HENRY
BAUERRICHTER and CHARLES GUSTAVUS GOTTGETREU, of Charterhouse Square,
in the Liberty of Glasshouse Yard, in the County of Middlesex, Manufac-
turers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Ninth day of April, in the year of our Lord One
thousand eight hundred and fifty-eight, in the twenty-first year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto us, the said
Henry Bauerrichter and Charles Gustavus Gottgetreu, Her special licence
that we, the said Henry Bauerrichter and Charles Gustavus Gottgetreu, our
executors, administrators, and assigns, or such others as we, the said Henry
Bauerrichter and Charles Gustavus Gottgetreu our executors, administrators,
and assigus, 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 King-
dom of Great Britain and Ireland, the Channel Islands, and Isle of Man, an
Invention for "IMPROVEMENTS IN PRINTING IN GOLD, SILVER, BRONZE, AND OTHER
METAL ON GLASS," upon the condition (amongst others) that we, the said Henry
Bauerrichter and Charles Gustavus Gottgetreu, our executors or adminis-
trators, by an instrument in writing under our or their hands and seals,
or under the hand and seal of one of us or them, 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 immediately after the date of the
said Letters Patent.
NOW KNOW YE, that we, the said Henry Bauerrichter and Charles Gus-
tavus Gottgetreu, 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 the following statement thereof, that is to say:
Some time since I, Charles Gustavus Gottgetreu, sought and obtained Pro-
visional Protection for a method of lithographic printing in oil and varnish
colors, and metal, on glass, wood, papier mâche, marble, metal, porcelain, or
any other material that offers a suitable surface, which we failed satisfactorily
to bring to perfection..
We have since made various experiments, and believe we have now dis
covered the means by which to insure the greatest possible perfection.

page_text: From a drawing on stone or zinc plate we print on a soft thin slightly
sized pulp paper, commonly called tissue paper, with strong varnish mixed
with venetian turpentine. This varnish printing is transferred to glass in
the following manner :-We lay the paper carefully on the glass, and press it
gently to it with a wet sponge, then we go over it with a soft roller made
expressly for this purpose. Then we place a number, say, about twenty glasses
thus prepared on one another, with something heavy on the top one, in order
to cause a sufficient pressure to insure the papers adhering well to the glasses.
After being left in this state for about half an hour the glasses are taken up
again, soft stout paper is rolled on the thin paper in order to absorb moisture
therefrom, and we continue to roll, with a roller such as referred to, until the
thin paper adhering to the glass is quite dry, and all the lines of the drawing
or representation show through the paper, then the (thin) paper is carefully
pulled off, leaving the varnish printing in great perfection sticking to the glass.
The glass is now covered with leaf metal, gold, silver, or bronze, the rollers
are again gently drawn across, and the glass rubbed with the hand or soft
wool, to remove the metal from the other parts than impressed by the varnish
impression or design. After this the glass presents the whole drawing or
representation in gold, silver, or other metal, and must be left to dry, which
takes, according to the state of the air, from two to eight and ten days.
To dry them by artificial means is not desirable, as the metal, gold, etc., are
almost invariably more or less tarnished and discolored by doing so. The
glass is now ready to be colored and coated, if so required. But to prevent
more effectually the gold or other metal leaf from being affected by air or the
colours applied to form the ground, etc., we, before the application of the
ground color, coat the whole with isinglass.
Glass thus treated may be employed for many ornamental purposes, and
especially for what are commonly called "showboards," or such like advertising
media. And the glass may, if desired, at the same side as the letters or other
device, be covered or partially so by a coating of paint or other coloring
matter, or cloth or other fabric, foil or other paper or material, as background.
The metal leaf commonly called gold it is well known is not pure gold, but
only a composition used in lieu thereof; but when it is desirable to use real
gold, we first coat the surface to be covered thereby with a solution of
isinglass, by which adhesion is secured, and we then print by means of varnish
on the gold the design desired to be retained. The roller we employ is con-
structed from wood, covered first with woollen cloth, then with cotton velvet,
and for facility of use we, by preference, apply it so as to turn freely in an iron
fork or frame with a handle.

page_text: Having thus described the nature of our said Invention, and in what manner
we carry the same into effect, we would have it understood that we do not
confine ourselves to the precise details referred to, so long as the peculiar
character of the improvements be retained substantially as explained.
In witness whereof, we, the said Henry Bauerrichter and Charles Gus-
tavus Gottgetreu, have hereunto set our hands and seals, this Eighth
day of October, in the year of our Lord One thousand eight hundred
and fifty-eight.
Witness,
HENRY BAUERRICHTER.
(L.S.)
CHARLES GUSTAVUS GOTTGETREU. (L.S.)
BENJN J. B. MILLS,
73, Chancery Lane.