Improvements relating to the Preparation of Zinc Plates and other Printing Surfaces to be employed in Lithographic Machines.
Year: 1891

page_text: Date of Application, 16th July, 1891
Complete Specification Left, 19th Apr., 1892-Accepted, 21st May. 1892
PROVISIONAL SPECIFICATION.
Improvements relating to the Preparation of Zinc Plates and other
Printing Surfaces to be employed in Lithographic Machines.
I FRANCIS DE BRANDT of 31 Charlotte Street Fitzroy Square in the County
of Middlesex Gentleman do hereby declare the nature of this invention to be as
follows:-
This invention relates to the preparation of zinc plates and other printing
surfaces to be used in litho machines so as to dispense with the necessity of having
blankets on the cylinders of such machines and the printing effected simply by
covering the cylinder with say twelve sheets of paper covered with American cloth
with overlay similar to letterpress printing.
According to this invention I obtain what is required to be printed in relief on
the printing surface and this I effect as follows:-
The transfer 1 roll up with a special ink prepared as hereafter described and
then cover such inked surface with ether, and heat same to form an enamel on such
surface in order to make the portions to be printed in relief from which any number
of copies may be printed with the cylinder covered as aforesaid.
By preparing the printing surfaces as aforesaid any alterations or corrections
may be made.
The ink above referred to is composed of:-
Four parts antimony black.
Two parts bone black.
Two parts fresh resin from trees.
Two parts strong varnish.
Two parts Berlin blue.
Four parts of ordinary printing ink.
COMPLETE SPECIFICATION.
Improvements relating to the Preparation of Zinc Plates and other
Printing Surfaces to be employed in Lithographic Machines.
1 FRANCIS DE BRANDT of 31 Charlotte Street Fitzroy Square in the County
of Middlesex Gentleman, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
This invention relates to the preparation of zinc plates stones and other printing
surfaces to be used in litho machines so as to dispense with the necessity of having
blankets on the cylinders of such machines and the printing effected simply by
covering the cylinder with say twelve sheets of paper covered with American cloth
with overlay similar to letterpress printing.
According to this invention I obtain what is required to be printed in relief on
the printing surface and this I effect as follows:
The transfer I make with a special ink prepared as hereafter described and then
I may cover such inked surface with ether and heat same to form an enamel on
such surface in order to make the portions to be printed in relief from which any
number of copies may be printed with the cylinder covered as aforesaid.

page_text: By preparing the printing surfaces as aforesaid any alterations or corrections
may be made.
The ink above referred to is composed of :-
Four parts antimony black.
Two parts bone black.
Two parts fresh resin from trees.
Two parts strong varnish.
Two parts Berlin blue.
Four parts of ordinary printing ink.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
(1) The use of ink composed as herein described for printing from zinc plates
and other printing surfaces (prepared as herein described) to be employed in
lithographic machines.
(2) The improvements herein before described for the preparation of zinc plates
and other printing surfaces to be employed in lithographic machines.
Dated this 19th day of April 1892.
BROWNE & Co.,
9, Warwick Court, Gray's Inn, W.C., Agents for Applicant.