IMPROVEMENTS IN THE MANUFACTURE OF COLOURED PENCILS, APPLICABLE FOR WRITING OR DRAWING ON GLASS, CHINA, METAL, AND SIMILAR SMOOTH OR POLISHED SURFACES
Year: 1878

page_text: LETTERS PATENT to Charles Edward Weaver and Charles Seimert, both of
121, Queen Victoria Street, in the City of London, for the Invention of
"IMPROVEMENTS IN THE MANUFACTURE OF COLOURED PENCILS, APPLICABLE
FOR WRITING OR DRAWING ON GLASS, CHINA, METAL, AND SIMILAR SMOOTH
OR POLISHED SURFACES." A. communication from abroad by Lothar von
Faber, of Stein, near Nuremberg, in the Kingdom of Bavaria, Germany.
PROVISIONAL SPECIFICATION left by the said Charlos Edward Weaver
and Charles Seimert at the Office of the Commissioners of Patents on the 18th
June 1878.
"
CHARLES EDWARD WEAVER and CHARLES SETMERT, both of 121, Queen Victoria
Street, in the City of London. IMPROVEMENTS IN THE MANUFACTURE OF COLOURED
PENCILS, APPLICABLE FOR WRITING OR DRAWING ON GLASS, CHINA, METAL, AND
SIMILAR SMOOTH OR POLISHED SURFACES." [A communication from abroad by
Lothar von Faber, of Stein, near Nuremberg, in the Kingdom of Bavaria,
Germany.]
This Invention has for its object to produce coloured pencils for writing or
drawing on glass, china, metal, and similar smooth or polished surfaces. For this
purpose pencils are produced as follows from colouring matters mixed with a com-
pound of wax and tallow.
1. To form black pencils, mix 10 parts finest lamp black, 40 parts white or
bleached wax, 10 parts tallow.
2. To form white pencils, mix 40 parts Cremnitz white, 20 parts white or bleached
wax, 10 parts tallow.
3. To form light blue pencils, mix 10 parts Prussian blue, 20 parts white or
bleached wax, 10 parts tallow.
4. To form dark blue pencils, mix 15 parts Prussian blue, 5 parts gum arabic, 10
parts tallow.
ID 431

page_text: 5. To form yellow pencils, mix 10 parts yellow chrome, 20 parts white or bleached
wax, 10 parts tallow.
The colours are mixed with the above-mentioned fatty substances in a warm
state, and are then finely reduced and dried in the air sufficiently to allow of their
by formed by hydraulic pressure into round sticks. After this they are further 5
dried in the air, and when of a proper consistency or firmness are glued into
wood.
Pencils of other colours may be made in a similar manner.
I
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Charles Edward Weaver and Charles Seimert in the Great Seal
Patent Office on the 18th December 1878.
CHARLES EDWARD WEAVER and CHARLES SEIMERT, both of 121, Queen Victoria
• Street, in the City of London. "IMPROVEMENTS IN THE MANUFACTURE OF
COLOURED PENCILS, APPLICABLE FOR WRITING OR DRAWING ON GLASS, CHINA,
METAL, AND SIMILAR SMOOTH OR POLISHED SURFACES." A communication from
abroad by Lothar von Faber, of Stein, near Nurenberg, in the Kingdom of Bavaria,
Germany.
This Invention has for its object to produce coloured pencils applicable for writing
or drawing on glass, china, metal, and similar smooth or polished surfaces. For this
purpose pencils are produced as follows from colouring matters mixed with a com-
pound of wax and tallow.
1. To form black pencils, mix 10 parts finest lamp black, 40 parts white or
bleached wax, 10 parts tallow.
2. To form white pencils, mix 40 parts Cremnitz white, 20 parts white or bleached
wax, 10 parts tallow.
3. To form light blue pencils, mix 10 parts Prussian blue, 20 parts white or
bleached wax, 10 parts tallow.
4. To form dark blue pencils, mix 15 parts Prussian blue, 5 parts gum arabic, 10
parts tallow.
5. To form yellow pencils; mix 10 parts yellow chrome, 20 parts white or bleached.
wax, 10 parts tallow.
The colours are mixed with the above-mentioned fatty substances in a warm
state, and are then finely reduced and dried in the air sufficiently to allow of their
being formed by hydraulic pressure into round or square sticks. After this they
are further dried in the air, and when of a proper consistency or firmness are glued
into wood in the ordinary manner as when making ordinary black lead pencils or
ordinary colored pencils.
Pencils of other colours may be made in a similar manner.
It will be observed that in the case of dark blue pencils formed with Prussian
blue, that gum arabic is, employed in place of the wax used for the other colours.
This is done in order to obtain a more thorough combination of the Prussian blue

page_text: with the other ingredients. The gum is dissolved in water, and in this state mixed
with the tallow, which has also been made liquid by warming. The Prussian blue
is then added in a dry state, in the proportion stated. The paste thus formed is
thoroughly mixed in a mortar, and afterwards dried and subjected to pressure, and
made up into pencils in the same manner as with the other colours.
It will also be observed that the proportions in which the wax and tallow are
used are not in all cases the same, and also that the proportion of fatty substances
used varies with the nature of the coloring material with which it is to be com-
bined.
The right proportion of fatty matter to use with different coloring matters such
as are now used in the manufacture of coloured pencils to bring them to the same
consistency as in the examples above given, may be readily determined by experi-
ment, the object in all cases being that the sticks of colored material should be of a
sufficiently soft and sticky nature to adhere to glass or other polished surface when
drawn over it, and yet when glued into wood, so as to form a pencil, as herein-before
explained, that the exposed end or point of the stick of colored compound shall hold
together sufficiently to allow of the pointed end of the pencil being pressed mode-
rately against the surface to be marked by it.
Having thus described the nature of the Invention, and the manner of performing
the same, we would have it understood that we claim,―
First. The manufacture of colored pencils applicable for writing or drawing on
glass, china, metal, and similar smooth or polished surfaces, substantially as herein-
before described.
Second. The manufacture of colored pencils applicable for writing or drawing on
glass, china, metal, and similar smooth or polished surfaces from sticks of the colored
compositions herein-before specified.
Third. The manufacture of colored pencils applicable for writing or drawing on
glass, chinn, metal, and similar smooth or polished surfaces, from sticks composed of
coloring matters, combined with mixtures of wax and tallow, substantially as herein-
before described.
Fourth. The manufacture of colored pencils applicable for writing or drawing on
glass, china, metal, and similar smooth or polished surfaces, from sticks composed of
coloring matter, combined with tallow and hardening material, substantially as
herein-before described.
In witness whereof, I, the said Charles Seimert, have hereunto set my hand
and seal, this Seventeenth day of December, in the year of our Lord One
thousand eight hundred and seventy-eight.
CHADIES SETMEDT