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

1987-06-12

1990-09-04

Michl, Paul R.

Radiation imagery chemistry: process, composition, or product th

Post imaging processing

Positive

430410, 430 98, 430940, G03C 522, G03C 524

Patent

active

049544276

ABSTRACT:
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):

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patent: 4358528 (1982-11-01), Takagi et al.
patent: 4481285 (1984-11-01), Takagi et al.
patent: 4482627 (1984-11-01), Takagi et al.
patent: 4629678 (1986-12-01), Murai
patent: 4789627 (1988-12-01), Inoue et al.
patent: 4801520 (1989-01-01), Inoue et al.
Copending Application Serial No. 07/067850, Inoue, "Process for Forming Direct-Positive Image", 6/30/87.
Research Disclosure 18246, Jun. 1979.
Patent Abstract of Japan, vol. 10, No. 15, Jan. 21, 1986.

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