Fixer additives used in combination with iron complex based bleaches to improve desilvering

摘要

A method of treating a seasoned fixing solution comprising desilvering a fixing solution containing a chelating compound represented by Formula I MOOC(CH2)m(X)p((CH2)nCOOM)q(I) where X is N, or C-OH; n and m are independently 0, 1, or 2; if X is N then p is 0 or 1 and q is 1 or 2; if X is C-OH then p is 0, 1 or 2 and q is 1 or 2; and M is a cationic counterion; and further containing a carryover amount of a bleaching agent which is a complex of ferric ion and a tridentate or a tetradentate ligand.