Silver halide photographic photosensitive material

Details Silver halide photographic photosensitive material Silver halide photographic photosensitive material

1996-02-20

1997-11-25

Letscher, Geraldine

Radiation imagery chemistry: process, composition, or product th

Post imaging processing

Physical developing

430267, 430627, 430631, 430637, G03C 106

Patent

active

056911076

ABSTRACT:
The present invention provides a silver halide photographic photosensitive material which comprises a support and at least one silver halide photographic emulsion layer, a hydrazine compound being contained in at least one of the emulsion layer and other hydrophilic colloid layer, characterized in that at least one of the emulsion layer and other hydrophilic colloid layer contains a water-soluble polymer having an amino group exclusive of a primary amino group as a promoter for enhancement of contrast. By using the said silver halide photographic photosensitive material, images of high contrast can be formed using a developer of low pH value without causing change in photographic performances even when the pH value changes.

REFERENCES:
patent: 3879205 (1975-04-01), Fitzgerald et al.
patent: 4278759 (1981-07-01), Saleck et al.
patent: 5279920 (1994-01-01), Onodera et al.
patent: 5283158 (1994-02-01), Onodera et al.

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