Direct positive silver halide light-sensitive material and metho

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

1978-11-17

1981-05-05

Louie, Jr., Won H.

Radiation imagery chemistry: process, composition, or product th

Post imaging processing

Positive

430379, 430505, 430559, 430570, 430580, 430581, 430592, 430591, 430598, 564 27, G03C 136

Patent

active

042660130

ABSTRACT:
A light-sensitive silver halide photographic material comprising a support having thereon a layer containing a compound represented by the formula (I): ##STR1## wherein R.sub.1 represents an aliphatic or aromatic residue; R.sub.2 represents a hydrogen atom, an aliphatic or an aromatic residue; and X.sub.1 and X.sub.2, which may be the same or different, each represents a divalent aromatic group; and a method of forming a direct positive image which comprises processing a light-sensitive silver halide photographic material having a support carrying thereon an internal latent image type silver halide emulsion layer in the presence of the compound represented by the said formula (I). The compound is particularly effective in combination with diffusible dye releasing (DRR) compounds having o-hydroxyarylsulfamoyl groups.

REFERENCES:
patent: 3227552 (1966-01-01), Whitmore
patent: 4030925 (1977-06-01), Leone et al.
patent: 4080207 (1978-03-01), Leone et al.

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