Carte barytée épaisse (280g) semi-brillante de tonalité blanc cassé. Emulsion ton chaud à contraste variable pour agrandissement.
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.
PRESTIGE VAR . CB STYLE 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.
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.
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.
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.
To effect even and rapid drying, you may use a weeting agent as a final rinse. Excess water should be removed from the surface of prints with a clean sponge or squeggee. Prints may then be dried in dust-free air on drying screens or in a clean photo-blotter.
PRESTIGE VAR. CB STYLE may be toned, retouched, spotted and mounted using normal methods.