Photographic fixer compositions and method for processing a phot

Radiation imagery chemistry: process – composition – or product th – Nonradiation sensitive image processing compositions or... – Fixer

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430451, 430453, G03C 538

Patent

active

059687207

ABSTRACT:
A photographic fixer compositions comprising a silver halide solvent, an aluminum salt hardening agent, a buffering agent and ammonium ions in amount of at least 0.20 mol/l, wherein said fixer composition also contains at least an aminopolycarboxylic acid sequestering agent of formula (I-a) or (I-b) or a water-soluble salt thereof and d) at least a polyphosphonic acid sequestering agent of formula (II-a), (II-b), (II-c), (II-d') or (II-d"): ##STR1## wherein the substituents are defined in the specification. The present invention also provides a method of processing an exposed photographic silver halide element comprising the steps of developing by means of a developer comprising a silver halide developing agent and treating the developed element with a fixer composition, wherein the fixer composition is one described above.

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patent: 5217853 (1993-06-01), Yamada et al.
patent: 5272046 (1993-12-01), Sasaka
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patent: 5298373 (1994-03-01), Sasaka et al.
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patent: 5415983 (1995-05-01), Kojima et al.
CA 120-22-284859f.
"Hardening Fix Baths for Use in Photographic Processing," Research Disclosure, Nov., 1979, No. 18728, p. 625.

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