Direct positive silver halide light-sensitive material

Details Direct positive silver halide light-sensitive material Direct positive silver halide light-sensitive material

1980-06-06

1981-10-13

Louie, Jr., Won H.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified radiation sensitive composition with color...

430598, 430570, 430578, 430580, 430581, 430592, 430562, 430523, 430589, 430211, 564 18, 564 27, G03C 136

Patent

active

042949190

ABSTRACT:
A direct positive silver halide photographic light-sensitive material is described, comprising a support having coated thereon a light-sensitive silver halide photographic emulsion layer and a hydrophilic colloid layer, at least one of said layers containing a compound represented by the formula (I): ##STR1## wherein R.sup.1 represents R.sup.6 or R.sup.6 CO--; and R.sup.6 represents an aliphatic group, an aromatic group, a heterocyclic aromatic group or hydrogen; R.sup.2 and R.sup.4, which may be the same or different, each represents an aliphatic group, an aromatic group, a heterocyclic aromatic group or a hydrogen atom; or R.sup.1 and R.sup.2 together can form a ring; R.sup.3 represents hydrogen or an aliphatic group; R.sup.5 represents Y or X--A--Y wherein X and Y, which may be the same or different, each represents a divalent aromatic group; and A represents a divalent group selected from --CONH--, --NHCONH--, --SO.sub.2 NH--, --B--CONH-- and --B--SO.sub.2 NH-- wherein B represents --E--, --O--E-- or --S--E-- wherein O and S is bonded to X; and E represents a divalent aliphatic group; the compound represented by formula (I) is a fogging agent which imparts a desired fogging activity without detracting from spectral sensitization.

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