Super-high contrast negative type photographic material containi

Details Super-high contrast negative type photographic material containi Super-high contrast negative type photographic material containi

1987-04-08

1989-06-13

Michl, Paul R.

Radiation imagery chemistry: process, composition, or product th

Silver halide colloid tanning process, composition, or product

430947, G03C 128, G03C 106

Patent

active

048392588

ABSTRACT:
A super-high contrast negative type silver halide photographic material is disclosed, comprising a support having provided thereon at least one silver halide emulsion layer, said emulsion layer or layers or other hydrophilic colloidal layer or layers containing a hydrazine derivative, wherein said photographic material further contains a compound selected from reductones and at least one compound represented by formula (I) or (II) ##STR1## wherein X.sub.1 represents a halogen atom, an N-methylolamino group, or a glycidoxy group; Y.sub.1 and Z.sub.1 each represents a hydrogen atom, a halogen atom, a hydroxyl group, --OM (wherein M represents an alkali metal ion), a substituted or unsubstituted amino group, an alkyl ether group, a phenyl ether group, an alkyl thioether group, a phenyl thioether group, a sulfonamide group, or an alkylsulfonamide group.
The photographic material exhibits high sensitivity and high contrast without forming black spots, even when processed with a stable developer, and also exhibits high mechanical film strength.

REFERENCES:
patent: 4053318 (1977-10-01), Sato et al.
patent: 4243739 (1981-01-01), Mifune et al.
James, The Theory of the Photographic Process, (4th Ed.) pp. 304, 313, 150, 151, 152.

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