Photographic material containing a mixture of silver halide emul

Details Photographic material containing a mixture of silver halide emul Photographic material containing a mixture of silver halide emul

1993-10-25

1994-11-08

Chea, Thorl

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430203, 430230, 430247, 430611, 430613, G03C 100, G03C 1035

Patent

active

053626206

ABSTRACT:
The present invention discloses a photographic material comprising on a support a photosensitive layer containing a mixture of silver halide emulsions at least one of which is spectrally sensitized and at least one of which is not spectrally sensitized characterized in that the surface of the silver halide particles of the silver halide emulsion not being spectrally sensitized is loaded with a stabilizer having a mercapto group or the tautomeric thione group thereof such that the surface covered by one molecule of stabilizer is between 10 .ANG..sup.2 and 70 .ANG..sup.2. The loss of speed due to migration of the spectral sensitizer from the sensitized emulsion to the non sensitized emulsion is reduced and can even be inhibited.

REFERENCES:
patent: 4693955 (1987-07-01), Torizuka et al.
patent: 5006455 (1991-04-01), Patzold et al.

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