Method of forming photographic line and half-tone images

Details Method of forming photographic line and half-tone images Method of forming photographic line and half-tone images

1972-03-01

1978-09-12

Kelley, Mary F.

Gas separation: apparatus

Electric field separation apparatus

Including gas flow distribution means

96 61R, G03C 532, G03C 538

Patent

active

041134893

ABSTRACT:
High-contrast photographic images are obtained by developing with a developer containing at least one dihydroxybenzene and sulfite ion and then treating with a solution of an oxidizing agent.

REFERENCES:
patent: 1814788 (1931-07-01), Tartas
patent: 2178896 (1939-11-01), Pifer
patent: 3178282 (1965-04-01), Luckey et al.
patent: 3671246 (1972-06-01), Corben
patent: 3762923 (1973-10-01), Sugiyama et al.

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