Method for producing a long scale direct-positive photographic e

Details Method for producing a long scale direct-positive photographic e Method for producing a long scale direct-positive photographic e

1981-12-07

1983-03-29

Louie, Jr., Won H.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430596, G03C 136

Patent

active

043784275

ABSTRACT:
A direct positive emulsion is produced by nonuniform fogging. The latter is conducted by varying the addition of the emulsion to fogging agent or by variable quenching of the fogging reaction. Films using such emulsion have extended exposure latitude or long scale, and the Density vs. Log Exposure curve is smooth and continuous.

REFERENCES:
patent: 3615573 (1971-10-01), Smith et al.
patent: 3672900 (1972-06-01), Kurz
patent: 3870522 (1975-03-01), Moisar et al.
patent: 4023972 (1977-05-01), Vanassche et al.

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