Single-part photographic bleach-fixing composition

A single-part photographic bleach-fixing composition formed by mixing at least the following:

• (a) a bleaching agent comprising an iron-ligand complex;
• (b) a fixing agent comprising a thiosulfate;
• and
• (c) at least one of the following formula (A) compound or formula (B) compound:
• wherein each of A, B and D independently represents a nitrogen atom or C—R5, wherein R5 represents a hydrogen atom, an alkyl group, an aryl group, an amino group, a carboxyl group or a mercapto group;
• X represents a hydrogen atom, an alkyl group or an aryl group;
• and Y represents a hydrogen atom, an alkyl group, an aryl group, an amino group, a carboxyl group or a mercapto group;
• wherein R5 is substituted or unsubstituted when R5 is not the hydrogen atom, X is substituted or unsubstituted when X is not the hydrogen atom, and Y is substituted or unsubstituted when Y is not the hydrogen atom;
• wherein W represents an oxygen atom, a sulfur atom or N—H;
• each of R1, R2, R3 and R4 independently represents a hydrogen atom, an alkyl group or an aryl group;
• wherein R2 and R3 are optionally bonded together to form a ring, and wherein R1 is substituted or unsubstituted when R1 is not the hydrogen atom, R2 is substituted or unsubstituted when R2 is not the hydrogen atom, R3 is substituted or unsubstituted when R3 is not the hydrogen atom, and R4 is substituted or unsubstituted when R4 is not the hydrogen atom.