Process for the formation of direct positive images

Details Process for the formation of direct positive images Process for the formation of direct positive images

G - Physics

03

C

96/279

G03C 5/50 (2006.01) G03C 1/485 (2006.01) G03C 1/06 (2006.01)

Patent

CA 1296940

ABSTRACT OF THE DISCLOSURE A process for the formation of direct positive images comprising (1) imagewise exposing to light, a light- sensitive material comprising a photographic emulsion layer containing unfogged internal latent image type silver halide particles on at least one support, and (2) developing the light-sensitive material in the presence of a nucleating agent and at least one nucleation accelerator of general formula (I): Image (I) wherein A represents a group which is adsorbed by a silver halide; Y represents a divalent linkage group consisting of atoms or atomic groups selected from the group consisting of a hydrogen atom, a carbon atom, a nitrogen atom, an oxygen atom, and a sulfur atom; R represents an organic group containing at least one of a thioether group, an amino group, an ammonium group, an ether group, and a heterocyclic group; n represents an integer of 0 or 1; and m represents an integer of 1 or 2 to form direct positive images.

539473

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