Contrasty light-sensitive silver halide material containing a hydrazine derivative and a heterocyclic mercaptan

US4166742A · kind A · utility

Assignee

• FUJITSU LIMITED · JP

Inventors

• Hiroyuki Mifune · Odawara, JP
• Shunji Takada · Odawara, JP
• Yoshitaka Akimura · Odawara, JP
• Tadao Shishido

Key dates

• Filing date: Oct 13, 1977
• Grant date: Sep 4, 1979
• Expiry date: Oct 13, 1997

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/15
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A silver halide photographic light-sensitive material containing at least one negative image silver halide photographic emulsion layer comprising silver halide grains that have an average grain size of not more than about 0.7 .mu. and are substantially of the surface latent image type and containing a binder in an amount of not more than about 250 g per mol of silver halide, and containing a compound represented by the following general formula (I): EQU r.sup.1 nhnhcor.sup.2 (i) wherein R.sup.1 represents an aryl group; and R.sup.2 represents a hydrogen atom, a phenyl group or an unsubstituted alkyl group having 1 to 3 carbon atoms; in at least one of the hydrophilic colloid layers, and a compound represented by the following general formula (II) or (III): ##STR1## wherein Y represents a sulfur atom, a selenium atom, an oxygen atom, a nitrogen atom or a divalent residue; --NR.sup.4 --, wherein R.sup.4 represents a hydrogen atom, an alkyl group or an aryl group; Z represents an atomic group required for completing a 5- or 6-membered heterocyclic ring; R.sup.5 and R.sup.6, which may be the same or different, each represents a hydrogen atom, a halogen atom, a carboxy group, an alkoxyc…