Direct positive photographic light-sensitive material

Details Direct positive photographic light-sensitive material Direct positive photographic light-sensitive material

1988-12-02

1991-01-01

Michl, Paul R.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430604, 430605, 430567, G03C 1785

Patent

active

049817809

ABSTRACT:
A direct positive photographic light-sensitive material comprising: (1) a support, (2) at least one photographic emulsion layer containing internal latent image type silver halide grains not having been previously fogged, wherein the internal latent image type silver halide grains are silver bromide, silver chloride, silver iodobromide, silver chlorobromide or silver chloroiodobromide grains in which at least one metal selected from manganese, copper, zinc, cadmium, lead, bismuth, indium, thallium, zirconium, lanthanum, chromium, rhenium, and metals of group VIII of the Periodic Table is incorporated, and (3) at least one compound represented by the following formula (N-1): ##STR1## wherein Z.sup.1 represents a nonmetallic atomic group necessary to form a 5-membered or 6-membered heterocyclic ring to which an aromatic ring or a heterocyclic ring may further be condensed; R.sup.1 represents an aliphatic group; X represents .dbd.C-- or --N--; Q represents a nonmetallic atomic group necessary to form a 4-membered to 12-membered nonaromatic hydrocarbon ring or nonaromatic heterocyclic ring; at least one of R.sup.1, a substituent for Z.sup.1 and a substituent for Q includes an alkynyl group; Y represents a counter ion necessary for charge balance; and n represents a number necessary to balance a charge.

REFERENCES:
patent: 3850637 (1974-11-01), Evans
patent: 4115122 (1978-07-01), Adachi
patent: 4395478 (1983-07-01), Hoyen
patent: 4581328 (1986-04-01), Matsuyama
patent: 4643965 (1987-10-01), Kubota

Affiliated with

Also associated with

Rating

Direct positive photographic light-sensitive material does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Direct positive photographic light-sensitive material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct positive photographic light-sensitive material will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1995778