Year: 1887

page_text: LEON WARNERKE Silverhowe Champion Hill London, S.E. do hereby declare the
nature of this invention to be as follows:-
Ordinary sized Paper of fine textur, prepared with substratum of soluble gummy
natur, is covered with Gelatine emulsion containing sensitive to light salts of Silver.-
The Paper so prepared, after the usual exposur to light in the camera or otherwise,
is put in contact with a glass plate, under the water, superflouse water being squeedged
out. The Paper serving only as temporary support is peeled off, and the film remaining
on the glass is developed, fixed, and generally treated like the ordinary Gelatine
Plate. The film produced on the Paper can be made of such thickness as to enable
the developed negative, when peeled off the glass after drying, to be used for printing
withouth glass.
1000

page_text: Improved Photograpиíð Fim raper.
LEON WARNERKE Silverhowe Champion Hill London S.E. 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 :-
Ordinary sized Paper of fine texture, prepared, with substratum of soluble gummy
nature, is covered with Gelatine emulsion, containing sensitive to light salts of Silver.-
The paper so prepared, after usual exposur to light, in the camera, or otherwise, is put
in contact, with a glass plate, under the water-superflouse water, being squeezed out.
The paper, serving only, as temporary support, is peeled off, and the film, remaining
on the glass, is developed, fixed, and generally treated, like the ordinary Gelatine
Plate.
The film produced on the paper is made of such thickness, as to enable the
developed negative, when peeled off the glass, after drying, to be used for printing
withouth glass.
The substratum above mantioned, is prepared, by making a mixtur, in cold water,
of Dextrine, starch, Caseine, Gum arabic, Gum tragacante, blood albumen, or other
soluble, or semisoluble in water gums, of the consistency of cream.-Relative pro-
portions of ingrediens and the choice of Gums, depend, on the quality of the paper, and
the temperatur of the room.
This substratum, must be applied in uniform layer to the surface of the Paper, by
any of the well known methods.
After drying, the prepared surface, must be glazed, which is best done, by the
frictional calender, or by stone-glazing machine.-The Paper, prepared as above, is
next covered with Gelatine emulsion, such as generally employed for the preparation of
the plates used in Photography.-Mode of the application of the emulsion, depend on
the size of the sheets of the Paper.-Hand covering, answer for small sheets, while
machine is to be used for the covering of the endless Paper.-The emulsion must
produce the film possessing necessary thickness;-and this is obtained, by repeating
the coating with emulsion three or four times.
Having now particularly described, and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
1.) Preparation of the gelatine film for the negatives, offering all the benefit of the
Paper, but thank, to the employement of substratum, permitting, to transfer the film to
the glass plate, befor the development, by simple application to the Glass in cold
water.
2.) The advantage, gained by developing the film, transparancy of which is not
marred, by the presence of the Paper.
3.) The advantage of beginning the action of the developer from the surface, not
turned to the light, what is especially noticed in the case of over exposur.
4.) The advantage of having a transparent grainless negative film possessing
necessary thickness, without any supplementary operation.
Dated this 10th day of November 1887.