Process for cleaning a photographic process device

Details Process for cleaning a photographic process device Process for cleaning a photographic process device

1991-11-20

1993-03-30

Albrecht, Dennis

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

134 3, 134 41, 156664, 252 791, 252 792, 252146, 252147, 430644, C23F 306, C23G 108, C11D 708, C11D 710

Patent

active

051981416

ABSTRACT:
Photographic processing devices such as stainless steel racks and tanks are cleaned to remove contaminants such as silver by contacting the devices with a cleaning solution comprising water, a mineral acid such as nitric acid, a soluble cerium (IV) salt such as ceric ammonium nitrate, and acetic acid. The cleaning solutions have a pH no greater than 1. The acetic acid inhibits the formation of a brown stain on in the stainless steel.

REFERENCES:
patent: 4640713 (1987-02-01), Harris
patent: 4725375 (1988-02-01), Fujii et al.

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