Direct-positive photographic silver halide emulsion

Details Direct-positive photographic silver halide emulsion Direct-positive photographic silver halide emulsion

1977-03-16

1979-04-03

Brown, J. Travis

Gas separation: apparatus

Solid sorbent apparatus

Plural solid sorbent beds

96101, G03C 116

Patent

active

041475542

ABSTRACT:
Direct-positive photographic silver halide emulsion which contains a dye having a 5,6-dihydropyrrolo[2,1-a]isoquinoline ring is disclosed. Said emulsion has a high speed, produces high contrast images, has no color stain with any remaining dye after processing and causes only small depression in the maximum density.

REFERENCES:
patent: 2525520 (1950-10-01), Brooker et al.
patent: 3598603 (1971-08-01), Chapman
patent: 3600184 (1971-08-01), Brooker et al.
patent: 3925085 (1975-12-01), Sato et al.
patent: 3941602 (1976-03-01), Depoorter et al.
patent: 3945832 (1976-03-01), Shiba et al.

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