An Improved Process and Composition for Producing Printing Ink.
Year: 1889

page_text: Date of Application, 28th Dec., 1889
Complete Specification Left, 27th Sept., 1890-Accepted, 8th Nov., 1890
PROVISIONAL SPECIFICATION.
An Improved Process and Composition for Producing Printing Ink.
I, CHARLES HUELSER of the firm of Huelser & Co. of 142 Fleet Street in the
City of London, Solicitors of Patents, do hereby declare the nature of this invention,
a communication to me from abroad by Georg Callmann of Weimar in the Empire
of Germany, Manufacturer, to be as follows:-
This invention has for its object to produce a printing ink of an intensely black
velvety shade, and essentially consists in substituting coal dust for the fuliginous
substances hitherto employed.
The improved article is produced by mixing the dust, obtained in grinding rich
brown-coal, with linseed oil varnish or substitutes thereof. Said coal dust, which
must be sufficiently fine to fall through a sieve of at least three thousand five hundred
meshes to the centimetre square, may be conveniently supplied from dust collectors,
as are employed in flour mills, placed in connection with a machine, grinding rich
brown-coal, preferably with a ball mill.
Dated this w7th of D
L100n
HUELSER & Co.,
Attorneys.
COMPLETE SPECIFICATION.
An Improved Process and Composition for Producing Printing Ink..
I, CHARLES HUELSER, of the firm of Huelser & Co. of Temple Chambers London,
International Patent Agency, do hereby declare the nature of this invention, a com-
munication to me from abroad by Georg Callmann of Weimar in the Empire of
Germany, Manufacturer, and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
The object of this invention is a process for producing printing ink and the essential
characteristic of my invention consists in the substitution of coal dust for the
fuliginous substances hitherto employed in the manufacture of printing ink, viz. soot
or equivalent. The purpose to be accomplished by the said substitution is to produce an
improved printing ink which excels other products of this class by having an intensely
black velvety shade.
To attain the end referred to, I mix dust, such as is produced in grinding rich
brown-coal, with linseed oil-varnish or any suitable substitute or substitutes of
the same.
The said coal dust must be sufficiently fine to fall through a sieve having
at least three thousand five hundred meshes to the square centimetre. Coal dust of
requisite fineness may be conveniently gained from dust collectors such as are
employed in flour mills, which collectors are for this purpose brought into connec
tion with a machine grinding rich brown-coal, preferably with a ball mill or similar
machinery.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
Process for producing printing ink consisting in substituting, for the soot or other
fuliginous substances hitherto used. dust from rich brown coal mixing onch dunt

page_text: which must be of sufficient fineness to fall through a sieve of at least three thousand
five hundred meshes to the square centimetre, with an appropriate quantity of linseed
oil-varnish or substitutes thereof, substantially as and for the purpose set forth.
Dated this 27th day of September 1890.
HUELSER & Co.,
Temple Chambers, London, Agents to Applicant.