Patent ID: 6518002
Filing Date: 2003-02-11
Classification: G03C

Abstract:
A photographic bleaching solution comprising:a) as a bleaching agent, a ferric ion complex of methylilminodiacetic acid or ethyliminodiacetic acid or salt thereof, wherein ferric ion is present in an amount of from about 0.005 to about 0.5 mol/l and the molar ratio of ferric ion to said methyliminodiacetic acid or ethyliminodiacetic acid or salt thereof is from about 1:1 to about 5:1, and b) from about 0.01 to about 0.1 mol/l of an anti-rust agent that is aminotrimethylene phosphonic acid, 1-hydroxyethylidene-1-diphosphonic acid, or an alkali metal salt of one of these.