Process for Rendering Cardboard and the like Impervious to the Action of Photographic Chemicals and suitable for Photographic Purposes.
Year: 1889

page_text: Date of Application, 9th May, 1889
Complete Specification Left. 10th Feb.. 1890-Accepted. 3rd May, 1890
PROVISIONAL SPECIFICATION.
Process for Rendering Cardboard and the like Impervious to the
Action of Photographic Chemicals and suitable for Photographic
Purposes.
I WILLIAM FRIESE GREENE Photographer 92 Piccadilly W. do hereby declare the
nature of this invention to be as follows.
"
I prepare ordinary cardboard, and the like on which it is desired to produce a
photographic picture, by coating the same with a suitable enamel or varnish which is
perfectly harmless as regards effect on any photographic emulsion or sensitive medium
with which the card or the like may be coated. Such prepared cards may be sensitized
and kept indefinitely as the ordinary photographic glass plates without injury to the
sensitive medium The object of my invention is the rapid production of a
permanent photographic picture by direct contact printing on the card or like support
thus obviating the usual process of lengthened washing mounting, drying, rolling,
and so on.
WILLIAM FRIESE GREENE,
COMPLETE SPECIFICATION.
Process for Rendering Cardboard and the like Impervious to the
Action of Photographic Chemicals and suitable for Photographic
Purposes.
I, WILLIAM FRIESE GREENE, Photographer, of, 92, Piccadilly, in the County of
London, 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 :-
This Invention relates to a new or improved process and means for rendering
cardboard and the like innocuous as regards any action on and suitable as a basis to
or upon which any suitable sensitizing medium with which it may be desired to coat
the same may be directly applied, and innocuous as regards any action on and
impervious to the action of photographic developing chemicals or solutions and
suitable for photographic purposes as hereinafter referred to.
The special object of the Invention is so to prepare ordinary commercial cards such
as those whereon photographic prints as ordinarily produced on sensitized paper are
at present mounted as to enable the same to be sensitized with mediums suitable for
the production of permanent photographic prints of the highest excellence and
artistic value, so as to enable such prints to be produced directly on such cards so as

page_text: to avoid the tedious process of mounting and the subsequent process of rolling the
prints, whereby the cost, time and labour required for the production of such prints
will be materially lessened.
Cardboard and such cards and the like as ordinarily manufactured and without
suitable preparation such as that contemplated by the present improvements is or are
not suitable for the reception of such sensitizing mediums or for the production
directly thereon of such prints, on account of the absorbency thereof and of the
chemicals or ingredients used in the manufacture thereof and contained therein and
of the liability of such chemicals to effect a deleterious action on such, mediums if
applied thereto directly and on developing solutions and on prints if obtained thereon
directly, causing such mediums to become unreliable and such prints to become
discolored and to fade and to be quickly destroyed so far as the artistic merit or value
thereof is concerned.
To avoid all such disadvantages and to obtain the aforesaid object and the important
advantages attendant thereon, I cause, in accordance with the present improvements,
the cards or the like to be subjected to a process or treatment which will be effective
in rendering the same innocuous as regards any action on and suitable as a basis to
or upon which any suitable sensitizing medium with which it may be desired to coat
the same, may be directly applied, and innocuous as regards any action on and
impervious to the action of photographic developing solutions, so as to render the
same suitable for the printing directly thereon of any desired photographic representation,
either by exposure under any suitable negative to daylight or artificial light or in the
camera or otherwise in any ordinary manner of obtaining photographic prints or
representations.
t
I attain such objects firstly by destroying all organic matter at the surface of the
card which would be deleterious to sensitizing mediums or to developing solutions and
as it were parchmentizing the surface of the card and rendering it specially suitable
for the subsequent operation hereinafter described, and this is effected by dipping the
card into or otherwise subjecting it to the action of a mixture of about two measures
of strong sulphuric acid and about one measure of water, subjecting it to such
treatment for a time dependent upon the quality of the card, after which I thoroughly
wash the card to free it from all acid, and dry it.
I then render the card or the like impervious to the action of developing solutions
and other wase suitable as aforesaid for photograpbic purposes, by brushing or
otherwise coating the card by hand or by suitable mechanical means once or more
times according to the relative fineness of the texture of the surface of the card, and
according as to whether a dull or matt or a glossy surface is required, with a mixture
prepared by gradually pouring about three parts by weight of spirits of turpentine
into about one part by weight of zinc oxide stirring the,mixture the whole while, and
by gradually adding to such mixture about one part by weight of pale gold size
continuing the stirring all the while and for a sufficient time subsequently to ensure
homogenity in the product.
All such operations should be conducted in perfectly clean containers preferably
formed of glass, and with glass stirring rods, and they may be conducted at ordinary
atmospheric temperatures.
After being thus coated the card is dried and will be suitable as aforesaid as a basis
to or upon which any suitable sensitizing medium may be applied directly, and it will
keep suitable for such use so long as it is kept free from the access of dust and under
other appropriate conditions, and after being sensitized it should also be kept until
required for use under usual appropriate conditions; and may then be used and
treated as if it were ordinary sensitized paper, but will possess the advantage of
dispensing with the operations of mounting and rolling and of consequently effecting
a material saving in the cost, time and labour involved in the production of the
required prints.
If the cardboard or the like is of a sufficiently good quality as to be innocuous as
regards any action on sensitizing mediums or developing solutions, then the aforesaid

page_text: preliminary operation may be dispensed with, it then only being necessary to render
the same impervious to the action of the developing chemicals and solutions as
set forth.
If any particular color of card be required there may be added to the zinc oxide,
before the admixture there with of the spirits of turpentine, any suitable coloring
matter innocuous as regards any action on sensitizing mediums or devolping
solutions.
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 herein before described new or improved process for rendering cardboard
and the like innocuous as regards any action on and suitable as a basis to or upon
which any suitable sensitizing medium with, which it may be desired to coat the same
may be directly applied, and innocuous as regards any action on and impervious to
the action of photographic developing chemicals or solutions and suitable for
photographic purposes
2. Subjecting cards and the like which are not suitable as a basis for the reception
of sensitizing mediums or for the development directly thereon of photographic prints
by chemical solutions to a process or treatment which will be effective in rendering
the same innocuous as regards any action on and suitable as a basis to or upon which
any suitable sensitizing medium with which it may be desired to coat the same may
be directly applied and innocuous as regards any action on and impervious to the
action of photographic developing chemicals or solutions and suitable for photographic
purposes substantially in the manner hereinbefore set forth.
3. In the treatment of cards and the like for the purpose of rendering the same
suitable for photographic purposes as aforesaid, subjecting the same to the action of a
mixture of sulphuric acid and water, as set forth.
4 In the treatment of cards and the like for the purpose of rendering the same
suitable for photographic purposes as aforesaid, coating the same with a mixture of
Zinc-oxide, spirits of turpentine and pale gold size, as set forth.
5. In the treatment of cards and the like for the purpose of rendering the same
suitable for photographic purposes as aforesaid, subjecting the same to the action of a
mixture of sulphuric acid and water, and subsequently coating the same with a
mixture of zinc oxide, spirits of turpentine and pale gold-size, as set forth.
6. As a new article of manufacture, cardboard, cards or the like which has or have
been rendered suitable for photographic purposes as aforesaid, by being subjected to
the process referred to in claim 1.
7. As a new article of manufacture, cardboard, cards or the like which has or have
been rendered suitable for photographic purposes as aforesaid, by being subjected to
the treatment referred to in claim 5 hereof.
8. As a new article of manufacture, cardboard, cards or the like which has or have
been rendered suitable for photographic purposes as aforesaid, by being subjected to
the treatment referred to in claim 4 hereof.
9. As a new article of manufacture, cardboard, cards or the like which has or have
been rendered suitable for photographic purposes as aforesaid, by being subjected to
the treatment referred to in claim 5, hereof, and by being subsequently coated with
any suitable sensitizing medium.
10 As a new article of manufacture, cardboard, cards or the like which has or have
been rendered suitable for photographic purposes as aforesaid, by being subjected to
the treatment referred to in claim 4 hereof, and by being subsequently coated with
any suitable sensitizing medium.
Dated this 27th day of January 1890
DAY, DAVIES & HUNT,
321, High Holborn, London, Agents for the Applicant.