FERROUS PHOTOGRAPHIC BLEACH-FIXING PRECURSOR COMPOSITION AND METHOD FOR PREPARING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a one-part bleach-fixing precursor composition usable directly in photographic processing and usable also as a regenerating solution. SOLUTION: The single-part photographic bleach-fixing precursor composition contains (a1) at least 0.05 mol/l one or more iron-ligand complexes, (a2) at least 0.15 mol/l one or more thiosulfates as a sole photographic fixing agent and (a3) one or more arbitrary sulfites and has pH 4-10, and >50 mol% of iron present in the precursor composition is in the form of Fe (II).