Method of cleaning photographic processing equipment

Details Method of cleaning photographic processing equipment Method of cleaning photographic processing equipment

1992-08-12

1993-11-30

Morris, Theodore

Cleaning and liquid contact with solids

Processes

For metallic, siliceous, or calcareous basework, including...

134 2219, 134 26, 134 42, 252 94, 252100, 252102, B08B 908

Patent

active

052661210

ABSTRACT:
Three aqueous cleaning solutions are disclosed, which may be used individually or as part of a two-solution cleaning method for silver halide-based photographic processing systems. One solution comprises water, an organic or inorganic iron salt wherein the iron is in the +3 oxidation state, a chelating agent, and an organic or inorganic silver complexing agent. A second solution comprises water, an organic or inorganic acid or acid anhydride, a surfactant, and a water soluble solvent. A third solution comprises water, a chelating agent, an alkali metal silicate salt, a surfactant, and a water soluble solvent.

REFERENCES:
patent: 3625908 (1968-06-01), Magin
patent: 3945828 (1976-03-01), Iwano
patent: 4021264 (1977-05-01), Knorre et al.
patent: 4678597 (1987-07-01), Keiner

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