Method of cleaning photographic processing equipment
AssigneeHelion Industries, Inc.
InventorKenneth R. Cioletti
Life of this patent
Estimating the term…
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.
Claims21
A method of cleaning the surfaces of a photographic processor in a silver halide based photographic system comprising first contacting the surfaces of the photographic processor with a first composition which 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, rinsing the surfaces with water, and then contacting the surfaces with a second composition which comprises water, an organic or inorganic acid or acid anhydride, a surfactant, and a water soluble solvent.
Dependencies are inferred from the claim text.