Improvements in Photographic Solutions, as used for Toning and Fixing Prints.
Year: 1897

page_text: Date of Application, 19th Aug., 1897
Complete Specification Left, 28th Feb., 1898-Accepted, 4th June, 1898
PROVISIONAL DIECIFICATION.
Improvements in Photographic Solutions, as used for Toning and
Fixing Prints.
ARTHUR EDWARD WADE, 177, Walworth Road, London, S.E., Photographic Store
Proprietor, do hereby declare the nature of this invention to be as follows:-
The drift of my invention is to enhance the permanency and aspect or finish of
photographic prints by the use of a combination solution for fixing and toning the
same, and which latter in addition completes the photograph in a more economical
manner. The true active principle of the solution-as composed of appropriate
proportions of chloride of gold, nitrate of lead, nitrate of potash, hyposulphite of soda,
flowers of sulphur, and quicklime respectively-is secured by the employment of
water previously submitted to a special treatment, viz., by its saturation, while
in a boiling condition, with smoke issueing from ordinary bituminous coal in its
burning state.
After passing the smoke through the boiling water until saturated with it and
allowing it to cool, the above-named ingredients are incorporated; the mixture is
agitated, and after letting it subside, the insoluble sediment is filtered off, when the
solution is complete. The prints treated with it are absolutely permanent, whereas
all those treated with other existing solutions fade in less than 2 years. Another of
its great properties is that the whole of the solution, once prepared, can be entirely
used up without adding to its strength, and at the same time the solution thus
prepared will remain fit for use at any time for a number of years. Finally one of
its valuable qualities consists in the fact that no previous washing of the prints is
required in using my solution, and besides, it absorbs silver from the paper which,--
were previous washing is carried out, would produce waste of the silver salt-in this
process enriches the solution and the tone of the picture dealt with is decidedly
improved.
Improvements in Photographic Solutions, as used for Toning and
Fixing Prints.
ARTHUR EDWARD WADE, 177, Walworth Road, London, S.E., Photographic Store Pro-
prietor, 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 :-
The object of my invention is both to improve the appearance or finish of photo-
graphic prints and their resisting capacity to time, in being exposed to vitiating
atmospheric conditions in storage, etc., and under various other circumstances of

page_text: ordinary contact. By the use of my combination solution for fixing and toning, and
which in addition completes the photograph with greater effect, a considerable degree
of economy is assured, and what is of immense importance in general photographic
manipulations consists in the fact that the employment of the dangerously poisonous
sulpho-cyanide of ammonium becomes unnecessary by the application of my com-
bination solution. The great active principle of the solution-as composed of appro-
priate proportions, varying for specific purposes, of chloride of gold; nitrate of lead;
nitrate of potash; hyposulphite of soda; flowers of sulphur, and quick lime
respectively is secured by the employment of ordinary water treated by the follow-
ing special process, viz., the water while in a boiling condition is saturated or acted
upon till saturated with smoke obtained by the burning of ordinary bituminous coal,
or the smoke may be obtained from anthracite or other carbonaceous fuel. After
passing the smoke through the boiling water until it becomes thoroughly saturated
with it, and then allowing it to cool, the above-named ingredients are incorporated
with the fluid thus treated in requisite proportions. The mixture is now agitated,
and after allowing it to subside or clear the insoluble sediment is filtered off, and the
solution is now complete for its intended functions. The prints treated with it are
absolutely permanent, whereas those treated with other existing solutions will fade in
probably less than two years. Another of its great properties is that the whole of the
solution, once prepared, can be entirely used up without adding to its strength, and
at the same time the solution thus prepared will remain fit for use at any time during
a number of years. Finally one of its valuable qualities consists in the fact that.no-
previous washing of the prints is required in using it, and besides it absorbs silver
from the paper which where previous washing is necessary, would produce a waste,
whereas in this process it will help to enrich the solution and to considerably improve
the tone of the picture treated with it.
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 smoke-as produced from bituminous or anthracite coal, or other
carbonaceous fuel-to act upon heated water, and its subsequent incorporation with
suitable proportions of chloride of gold; nitrate of lead; nitrate of potash; hypo-
sulphite of soda; flowers of sulphur, and quicklime respectively, substantially as
described in the above.
2. Its uses upon photographic prints without the employment of the sulphocyanide
of aminonia, as its functions are fully supplied by my invention.
Dotad thin the COLL
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