Photographic developing composition

Details Photographic developing composition Photographic developing composition

1997-06-24

1998-07-14

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Nonradiation sensitive image processing compositions or...

Developer

430438, 430440, 430446, 430466, 430481, 430483, G03C 530

Patent

active

057802122

ABSTRACT:
The present invention concerns a developer for silver halide photographic products comprising a co-developing agent of the 1-phenyl-3-pyrazolidinone type. These co-developing agents comprise solubilizing groups which are not attached directly to the phenyl ring or the pyrazolidine ring, and improve the stability of the developer composition.

REFERENCES:
patent: 3865591 (1975-02-01), Katz
patent: 4266002 (1981-05-01), McCreary et al.
patent: 5098819 (1992-03-01), Knapp
patent: 5194367 (1993-03-01), Yamada et al.
patent: 5264323 (1993-11-01), Purol et al.
patent: 5376510 (1994-12-01), Parker et al.

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