Process and device for recycling washing water in photographic p

Details Process and device for recycling washing water in photographic p Process and device for recycling washing water in photographic p

1999-01-22

2000-01-04

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Regenerating image processing composition

G03C 5395

Patent

active

060108339

ABSTRACT:
The invention relates to a process and apparatus for the treatment of photographic films. The film circulates in a series of processing baths, each of these baths comprising a washing area each comprising one or more tanks, the waste water from all the washing areas is recovered and treated in a single nanofiltration device, common to all the processing baths, the water hardness of the permeate from the nanofiltration device is adjusted, and the permeate is recycled to each of the washing areas of each of the processing baths.

REFERENCES:
patent: 3997347 (1976-12-01), Parsonage
patent: 4859575 (1989-08-01), Kurematsu et al.
patent: 5439584 (1995-08-01), Rosenfield

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