Method for processing exposed silver-based photographic material

Details Method for processing exposed silver-based photographic material Method for processing exposed silver-based photographic material

1998-04-03

1999-07-27

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Regenerating image processing composition

430400, G03C 5395

Patent

active

059288434

ABSTRACT:
A method for processing exposed silver-based photographic material comprises passing the exposed material through a bath of developer liquid and subsequently through a bath of fixer liquid. Silver from used fixer liquid is recovered by electrolysis. The fractional image exposure of exposed material to be processed in a coming period and the amount-of silver recovered by electrolysis in a preceding period are measured. The used fixer liquid is periodically regenerated by the addition of fresh fixer thereto. The quantity of fresh fixer to be added is calculated as a function of the measured fractional image exposure and as a function of the measured amount of recovered silver. The quality of the fixer is thereby maintained at an optimum level while keeping the quantity of fresh fixer which is used to a minimum.

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Questel Plus--Epoque 8912 8912; Sep. 24, 1997; p. 1; XP002041704. JP 3053245 Mar. 1991 Abstract.

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