Direct positive color image forming method

Details Direct positive color image forming method Direct positive color image forming method

1988-10-20

1990-05-15

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Color imaging process

Using identified radiation sensitive composition in the...

430378, 430409, 430410, 430547, 430507, 430592, 430593, 430598, G03C 730, G03C 122, G03C 1485

Patent

active

049257773

ABSTRACT:
A direct positive color image forming method which comprises processing an imagewise exposed photographic light-sensitive material with a surface color developing solution containing an aromatic primary amine color developing agent, after fogging treatment and/or during fogging treatment, wherein the photographic light-sensitive material comprises a support having thereon at least one internal latent image type silver halide emulsion layer that has not been previously fogged, a color image forming coupler, colloidal silver, and at least one compound represented by general formula (II): ##STR1## wherein Z represents an atomic group necessary for completing a 5-membered or 6-membered nitrogen-containing heterocyclic ring; D and D', which may be the same or different, each individually represents an atomic group necessary for completing an acidic nucleus and D and D' may be bonded to each other to form a cyclic structure; R.sup.1 represents a substituted or unsubstituted alkyl group which may form a salt with a metal atom or an organic compound; L.sup.1, L.sup.2, L.sup.3, L.sup.4, L.sup.5 and L.sup.6, which may be the same or different, each represents a substituted or unsubstituted methine group; n.sup.1 and n.sup.2 each represents 0 or 1; and l represents an integer from 0 to 3.
In accordance with the method of the present invention, direct positive color images having excellent gradation and color reproducibility are obtained.

REFERENCES:
patent: 4444871 (1984-04-01), Miyaoka et al.
patent: 4582779 (1986-04-01), Kubota et al.
patent: 4769316 (1988-09-01), Miyasaki et al.
patent: 4801520 (1989-01-01), Inoue et al.

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