Method of decontaminating a photographic bath with heat-reversib

Details Method of decontaminating a photographic bath with heat-reversib Method of decontaminating a photographic bath with heat-reversib

1998-11-19

1999-10-26

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Regenerating image processing composition

430399, 430400, G03C 5395

Patent

active

059725761

ABSTRACT:
The invention concerns a method for decontaminating a used photographic processing bath.
This method consists of putting the processing bath in contact with a heat-reversible hydrophilic polymer which becomes hydrophobic above a temperature lower than the temperature of the processing bath.
The tars and other organic contaminants present in the used photographic processing bath can be removed by cooling the heat-reversible polymer below the temperature where it becomes hydrophilic.

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patent: 4144373 (1979-03-01), Weiss et al.
patent: 5015560 (1991-05-01), Koboshi et al.
patent: 5059514 (1991-10-01), Ueda et al.
patent: 5219717 (1993-06-01), Schmittou et al.
patent: 5432245 (1995-07-01), Roberts et al.
patent: 5858630 (1999-01-01), Poncelet et al.

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