CORROSION OF PHOTOGRAPHIC TRACTS IN NUCLEAR EMULSIONS DURING FIXING

Journal Article · Fri Jan 01 04:00:00 EST 1960 · Helvetica Physica Acta (Switzerland)

OSTI ID:4052430

Hespanhol, L P

The corrosion of nuclear tracks in 600- mu Ilford emulsions G5, K5, and L4 was studied as a function of the fixing time for fixing baths of different pH and temperature. The composition of the fixing bath was sodium thiosulfate, 400 g/l; anhydrous sodium sulfate, 10 g/l; and glacial acetic acid, x cm/sup 3//l (x varying from 0.5 to 25). The corrosive effect of the bath was followed by measuring the grain density of the tracks, tbe blackening density, and the diameter of the track grains and plate grains. In the G5 and K5 emulsions the beginning of corrosion was observed at pH 4 and 5. Increased temperature caused corrosion to start in four days. At pH 6 no appreciable corrosion was detected even after 15 days in the fixing bath. Elevation of the pH abeve 6 prolongs the fixing time and produces clouding even when there is no corrosion. (J.S.R.)

• Research Organization: Ecole Polytechnique de l'Universite, Lausanne, Switzerland
• NSA Number: NSA-15-014463
• OSTI ID: 4052430
• Journal Information: Helvetica Physica Acta (Switzerland), Journal Name: Helvetica Physica Acta (Switzerland) Vol. Vol: 33; ISSN HPACA
• Country of Publication: Country unknown/Code not available
• Language: French

Related Subjects

ACETIC ACID
ACIDITY
CORROSION
DENSITY
DETECTION
ENGINEERING AND EQUIPMENT
ILFORD EMULSIONS
MEASURED VALUES
NUCLEAR EMULSIONS
PARTICLE TRACKS
PHOTOGRAPHIC FILM
SODIUM SULFATES
TEMPERATURE