Radiation imagery chemistry: process – composition – or product th – Nonradiation sensitive image processing compositions or... – Fixer
Patent
1996-07-15
1999-10-19
Le, Hoa Van
Radiation imagery chemistry: process, composition, or product th
Nonradiation sensitive image processing compositions or...
Fixer
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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CA 120-22-284859f.
"Hardening Fix Baths for Use in Photographic Processing," Research Disclosure, Nov., 1979, No. 18728, p. 625.
Buriano Franco
Faranda Filippo
Marchesano Carlo
Evearitt Gregory A.
Imation Corp
Le Hoa Van
Litman Mark A.
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