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HOME > PAPER > WARM > PRESTIGE VARIABLE CM
Photo Paper: Prestige Variable CM
PRESTIGE VARIABLE CM is a double weight,
semi-matte variable contrast photographic paper with a warm black image
tone. It comes on a heavy fiber-base stock of 300g per sqm and gives superb
results.
PRESTIGE VARIABLE CM can produce contrast grades ranging from soft to
exceptionally hard due to an emulsion incorporating both blue and green
sensitivities. With a multicontrast filter set, contrast grades from 0
to 5 are available in half-step increments.
Handling
A red safelight (such as one fitted with a Wratten 1A
filter) is recommanded. With a 15 watt bulb used direct illumination,
minimum working distance is 1,5 meters (5 feet). Safelight exposure longer
than 2 minutes may lead noticeable fog. It is a good idea to test for
safelight fog time-to-time.
Exposure
PRESTIGE VARIABLE CM can be exposed with any enlarger
or printer light source. As with all VC papers, be aware that some older
types of cold-light tubes may normally require more yellow filtration.
Also, note that exposure times depend upon which filter is in place. For
exemple : if 8 sec. is correct for filters number 0, 1 and 2 ; then filter
3 will require 9 sec. and filters 4 and 5 : 27 sec.
Development
Process in any good paper developer at 20°C (68°F)
for 1,5 to 2 min. with continuous agitation. BERGGER « Ecco »
and BER-98 developers works particulary well with this paper.
Stop Bath
An acid stop bath is optional but recommanded. It quickly
stops development by neutralizing alkali. This also helps extend fixer
life. Dilution : 45 cc of 28% acetic acid in 1 litre of water. Treatment
time : 15 sec. or 20 to 30 seconds if water rinse.
Fixing (maximum time : 10
minutes)
Treat in a conventional sodium thiosulfate fixer
for a minimum of 5 min. at 20°C (68°C). Normal fixer capacity
is 1,5 sqm/litre. A two bath fixing method (at 2,5 min. per bath) may
be used to avoid under-fixing. When the first bath is exhausted, replace
it with the second bath and mix a fresh bath « second bath ».
With ammonium thiosulfate (« rapid ») fixers, treat for 30
to 45 seconds only, then give a thorough pre-washed for 5 min. Next, treat
with a wash-aid (see « WASHING », below) with frequent agitation
for 10 min. before transfering to a final wash.
After-Treatments
CB ART responds well to bleaching and toning. To increase
the impression of warmth, you may wish to use a toner such as Kodak Brown
toner or a sepia toner
Washing
The use of a wash aid (such as Kodak Hypo Clearing Agent)
will reduce your wash time and increase the efficiency of your washing.
As well, it will help guarantee the permanence of your photograph. Wash
PRESTIGE in running water at rate fast enough to completely change once
every 5 minutes. Wash time is 1 hour at 20°C (68°F) or 30 min.
if a wash aid has been used.
Drying
To effect even and rapid drying, you may use a wetting
agent as a final rinse. Excess water should be removed from the surface
of prints with a clean sponge or squeegee. Prints may then be dried in
dust-free air on drying screens or in a clean photo-blotter.
Finishing
PRESTIGE VARIABLE CM may be toned, retouched, spotted
and mounted using normal methods.
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