Improvements in the Production and Application of Printing Blocks and Lithographic Printing Surfaces.
Year: 1894

page_text: Date of Application, 19th Nov., 1894
Complete Specification Left, 19th Aug., 1895-Accepted, 21st Sept., 1895
PROVISIONAL SPECIFICATION.
Improvements in the Production and Application of Printing Blocks
and Lithographic Printing Surfaces.
I, CHARLES CRABBE, of 36, Rue de Lancry, Paris, France, Printer do hereby
declare the nature of this invention to be as follows:-
My invention has for its object the production of printing blocks and lithographic
printing surfaces from which the ground work designs in general use for bank notes,
cheques, coupons, and other forms are printed, for the purpose of improving the
general appearance or adding to their security by increasing the difficulty of
copying for fraudulent purposes.
In carrying my invention into effect I first produce an original copy of the
desired ground work design, for which purpose I take a sheet of plain or coloured
paper or other suitable material, and form thereon by drawing, painting or other
suitable means in black, white or in one or more colours the pattern or designs
I wish to appear as forming the base of the ground work design, and on this
I write or print, with lithographic, printing or other suitable ink, over the whole or
any desired portion of such ground work base the written or printed matter I wish
to appear as a part of the ground work design.
Tale or other material finely powdered and of a suitable colour is then dusted
over the whole of such printed or written matter, which adhering to the ink causes
the whole of the printed or written lettering to appear of the colour of the powder
used. I then remove, with a brush or other suitable tool or article the powder
from those parts of the written or printed matter I wish to appear in the colour of
the ink used.
From the original copy of the ground work design produced in the manner.
herein before described printing blocks can be produced by photo-zincography or
by any of the photographic and chemical means in use for such purpose. The
colours or shades used in the production of the original copy of the ground work
design must in all cases be such as will produce the desired effect when subjected
to the photographic reproduction above mentioned.
From such printing blocks produced in the manner described transfers can be
taken and transferred on to the lithographic stone or other suitable surface from
which the desired ground work design can be lithographed.
Dated this Nineteenth day of November 1894..
Improvements in the Production and Application of Printing Blocks
and Lithographic Printing Surfaces.
I CHARLES CRABBE Printer and Engraver of 36 Rue de Lancry Paris in the
Republic of France 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 :-
My invention has for its object the production of printing blocks and lithographic
D

page_text: printing surfaces from which the ground work designs in general use for bank-notes,
cheques coupons and other forms are printed for the purpose of improving the
general appearance or adding to their security by increasing the difficulties of
copying for fraudulent purposes.
In carrying my invention into effect I first produce an original copy of the
desired ground work design for which purpose I take a sheet of plain or coloured
paper or other suitable material and form thereon by drawing, painting or other
suitable means in black, white or in one or more colours the pattern or design
I wish to appear as forming the base of the ground-work design and on this
I write or print with lithographic, printing or other suitable ink over the whole or
any desired portion of such ground-work base the written or printed matter I wish
to appear as a part of the ground-work design.
Talc or other material finely powdered and of a suitable colour is then dusted
over the whole of such printed or written matter which adhering to the ink causes
the whole of the printed or written matter to appear of the colour of the powder
used. I then remove with a brush or other suitable tool or article the powder
from those parts of the written or printed matter I wish to appear in the colour of
the ink used.
From the original copy of the ground-work design produced in the manner
herein before described printing blocks can be produced by photo-zincography or by
any of the photographic and chemical means in use for such purpose.
From such printing blocks produced in the manner described transfers can be
taken and transferred on to lithographic stones or other suitable surface from
which the desired ground-work design can be lithographed.
The colours or shades used in the production of the original copy of the ground-
work design must in all cases be such as will produce the desired effect when
subjected to the photographic reproduction mentioned herein.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1st. The production of printing blocks in the manner and for the purposes herein
described.
2nd. The use of finely powdered material in combination with an adhesive ink
in the production of the original copy from which the printing blocks are to be
made substantially in the manner and for the purposes herein described.
3rd. The production of lithographic printing surfaces substantially in the manner
and for the purposes herein described.
Dated this 17th day of August 1895.