Regeneration of spent fixer solution
AssigneeMarcel Sciarone
InventorJakob Van Rouendal Smit
Life of this patent
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Abstract
A process for regenerating spent fixer solution which includes the steps of adding finely particulate zinc, such as zinc dust, to the solution to cause silver dissolved therein to precipitate and removing the precipitate from the solution hereby producing a regenerated fixer solution.
Claims11
A process for regenerating spent fixer solution includes the steps of adding finely particulate zinc to the solution to cause silver dissolved therein to precipitate and removing the precipitate from the solution thereby producing a regenerated fixer solution and using the regenerated fixer solution without replenishing active fixer ingredient, optionally with adjustment of pH and replenishment of antioxidant.
Dependencies are inferred from the claim text.