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Photo Paper: NB

NB is a double weight photographic paper with a high quality chlorobromide emulsion. Its fiber base gives it exceptional results and whiteness while its silver content allows for a wide exposure range and development with remarkable gradation. Glossy and matt surfaces are available. It gives a neutral image tone.

Four grades are available :

Handling
Red safelight as for bromide paper is recommended. For instance, ENCAPSULITE R10 or WRATTEN 1A allows good darkroom lighting.

Exposure
Double weight glossy paper can be exposed with all enlarger and printer light source.

Development
NB can be processed in any good quality paper développer. However, we recommend formulas using 1 gram of Metol and 4 grams of Hydroquinone per litre of développer. Development time at 20°C (68°F) is 1 1/2 to 2 min. Most developers will have an average capacity of processing 1 _ to 2 sqm of PRESTIGEdouble weight per liter.

Stop Bath
An acid stop bath is optional but recommended. It quickly stops dévelopment by neutralizing alkali. This also helps extend fixer life. Dilution : 25 cc of 28% acetic acid in 1 litre of water. Stop bath time : 15 seconds or 20 to 30 seconds of water rinse.

Fixing (Temps Maximum : 10 Minutes)
NB should be fixed in most of conventional or rapid fixers. With a 220g to 280g Sodium Thiosulfate content fixer and at 18 to 23°C (65°F to 73°F), minimum fixing time is 5 mn. In 1 litre of working solution of fixer, 1 1/2 sqm of PRESTIGE can be processed.
You may wish to use the two-bath fixing method (at 2 _ min. per bath). When the first bath is exhausted it is replaced with the second bath and a fresh « second bath » is mixed. With this rotation method you will avoid under-fixing.

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 in running water at a 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
NB responds well to the majority of methods of toning, retouching and mounting.

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