The Wheeling daily intelligencer. [volume] (Wheeling, W. Va.) 1865-1903, 1899-10-23
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Photography.
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nicaton to the French Photographic
Society, which deals with a means Of
producing prints in which the flnal inns
age consist OF metallic gold In the red,
purple or violet form. "A gold-toned Sill
yer becomes bleached as far as the sill
yer image is concerned, and the re-
naming gold image may be red, purple
or violet. The purple. violet and red
images in which the gold Is in a state
Of division which probably cores
ponds to the condition of the metal in
the purple precipltate of cassius. are
not obtained in all cases. II the prints
are toned in the usual separate bath It
not infrequently happens that a coarse
blackish brown precipltate Of gold re-
places the silver Of the image, and It is
BY the use Of the combined bath that
the author obtained the gold image, In
tints ranging through rose, deep pur-
pie, violet and bright red
A new bath does not give the best re-
suits, the gold deposit being often coarse
and brownish. The following Is M. Ga
bellies method Of working. The COM
bined toning and fixing bath is com.
pounded as follows:
Old and exhausted tone.Axlng bath. 40 &C,
New bath alum, % grammesi hypo,
5000 gTammeS: acetate Of lead,
Eramme; water. 1000 gramesl ...lb9 &C.
One per cent chloride Of gold solution s &C.
This mixture is allowed to remain at
rest for two days before 1t Is used, and
the toning In It must be long and com
plete, so as to replace practically all the
silver In the image with the gold.
Twenty to thirty minutes may be sum
Client time in the toning bath, and after
about three hours washing the prints
are immersed in weak solution OF
mercurlc chloride, prepared by mixing
one volume of saturated solution with
twenty volumes Of water. The bleach
ing Of the silver image is tolerably
rapid in this solution, the gold toning
alone remaining.
A new plan Of development has been
invented by which the plates. prior to
exposure, are coated with developing
solution. In drying, the film retains SUI
iiclent Of the developing agent to pro-
duce the image when the exposed plate
Is placed in clean water. The process Is
placed in clean water. The process Is
this: Make up the following solution:
Pyrogallic d.......,................l9 paris
SattcytiC acid. .".............'.'.'.''':,5 pattt
DeXtrine Observation-Disclosures paEtA
Alcohol Pa tIts
Water ......,...........,..,.,.,. paris
The plates immersed in this are al
lowed to dry in the dark room, and can
be exposed ut any time after. They
can be perfectly developed by INNER
sion in water to which has been added a
few grains Of carbonate Of soda. or a
small quantity Of liquid ammonia.
There are many times when an other
wise good negative shows far too strong
contrasts There is little mechanical
device, which Is not generally known,
which will remedy this fault. When the
darker parts OF the print are nearly
done take a reading glass or a large
lens and concentrate the light on the
darker parts. In few minutes all the
detail will come out. 1t is good to keep
the lens or reading glass in motion. so
us to produce kind Of vignetting eff
feet.
The so-called magie photographs are
very simply made. Make print IN the
regular way on albumen paper. Wash
for two or three minutes and place in a
fixing bath Of hypo and water. one to
eight. Leave in the fixing bath five
minutes, wash thoroughly and place In
mercury, letting 1t remain until image
has entirely disappeared.
When the paper Is quite blank wash
and dry. The picture can be made to ap-
pear again by subjectIng It to the ac-
ton of hyposulphito Of soda, which can
be done in various; ways A convenlen.
and nystlfylng way Is to soak piece
of blottIng paper In saturated solution
OF hypo and dry II. When the magic
picture is to be developed moIsten the
blotting paper and lay the prepared pa
per face down on It, Press firmly and
the picture viii at once show itself The
picture so produced will fade again, but
can be brought back with a hypo re-
peatedly.