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US 5,464,727 AGranted
Cleaning of emulsion manufacturing apparatus
AssigneeEastman Kodak Company
InventorDouglas E. Singer
Life of this patent
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Abstract
The present invention is a method for cleaning and preparing photographic manufacturing equipment surfaces. An aqueous solution of potassium iodide and ferric ethylenediamine tetraacetate is prepared. The solution is flushed over the surfaces of the photographic manufacturing equipment removing deposited silver halide and silver. A high purity water flush is then performed.
Claims5
A method for cleaning and preparing photographic manufacturing equipment surfaces having solid silver halide and silver deposited on the photographic manufacturing equipment surfaces comprising:
- preparing an aqueous solution containing potassium iodide and ferric ethylenediamine tetraacetate;
- flushing the photographic manufacturing equipment surfaces with the aqueous solution containing potassium iodide and ferric ethylenediamine tetraacetate for a time sufficient to remove the deposited silver halide and silver;
- and
- flushing the photographic manufacturing equipment surfaces with a high purity water rinse.
1 more element
Dependencies are inferred from the claim text.