EP 0264192 A2 19880420 - Direct positive silver halide light-sensitive photographic material.
Title (en)
Direct positive silver halide light-sensitive photographic material.
Title (de)
Direkt positives, lichtempfindliches photographisches Silberhalogenidmaterial.
Title (fr)
Matériau photographique positif-direct à l'halogénure d'argent sensible à la lumière.
Publication
Application
Priority
JP 21769186 A 19860916
Abstract (en)
The material comprises a support and a silver halide emulsion layer thereon containing direct positive silver halide grains adapted to form an internal latent image upon imagewise exposure and being unpre-fogged, and a compound represented by general formula [I], <CHEM> wherein Z represents a group of non-metallic atoms necessary to complete a nitrogen-containing heterocyclic ring which may have a substituent; X represents a hydrogen atom or a substituent capable of being split off upon reaction with an oxidation product of a color developing agent; and R represents a hydrogen atom or a substituent. The emulsion has a maximum density which is sufficiently large and a minimum density which is sufficiently small. The foot portion of the density/exposure curve can exhibit high contrast while the highlight portion shows little or no tendency towards magenta color.
IPC 1-7
IPC 8 full level
G03C 1/485 (2006.01); G03C 7/305 (2006.01); G03C 7/38 (2006.01)
CPC (source: EP)
G03C 1/48538 (2013.01); G03C 7/30529 (2013.01); G03C 7/3825 (2013.01)
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
EP 0264192 A2 19880420; EP 0264192 A3 19900411; EP 0264192 B1 19940330; DE 3789483 D1 19940505; JP S63184743 A 19880730
DOCDB simple family (application)
EP 87308168 A 19870916; DE 3789483 T 19870916; JP 22697887 A 19870910