Radiation imagery chemistry: process – composition – or product th – Nonradiation sensitive image processing compositions or... – Fixer
Patent
1998-02-19
1999-08-03
Le, Hoa Van
Radiation imagery chemistry: process, composition, or product th
Nonradiation sensitive image processing compositions or...
Fixer
430432, G03C 538
Patent
active
059324007
ABSTRACT:
The present invention provides an odorless fixing composition for fixing silver halide photographic media. The composition includes ammonium thiosulfate as a halide solubilizing agent and a non-volatile organic acid for pH buffering. Preferably, the acid is glycolic acid, succinic acid, or a derivative thereof. In addition, the present invention provides a method for fixing silver halide photographic media by exposing the developed media to the odorless fixer composition.
REFERENCES:
patent: 2295734 (1942-09-01), Holzworth
patent: 5629138 (1997-05-01), Faranda et al.
Haist, G. "Acid Hardening Thiosulfate Fixing Baths" Modern Photographic Processing vol. 2, Chapter 13: 575-576 (1979).
Sheppard, S.E. et al. "Chemistry of the Acid Fixing Bath" J. Frank. Inst. 196: 45-67 (1923).
Wall, E.J. & Jordan, F.I. "Fixing, Washing, and Drying Negatives" Photographic Facts and Formulas Chapter 4: 142-160 (1975).
Fujii Dewey R.
Fujii Gary
Le Hoa Van
Varichem Corporation
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