Developer compositions for high contrast diffusion transfer phot

Details Developer compositions for high contrast diffusion transfer phot Developer compositions for high contrast diffusion transfer phot

1973-03-30

1979-04-03

Martin, Jr., Roland E.

Gas separation: apparatus

Electric field separation apparatus

Electrode cleaner, apparatus part flusher, discharger, or...

96 66R, 96 76R, G03C 554

Patent

active

041475437

ABSTRACT:
Developer compositions for diffusion transfer photographic materials containing amino compounds and imidazole compounds are used in a diffusion transfer photographic process for obtaining litho-type positive images of high contrast and of good short toe effect, the amino compounds being represented by the following formula I and the imidazole compounds by the following formula II:

REFERENCES:
patent: 3147118 (1964-09-01), Dersch
patent: 3502472 (1970-03-01), Willems
patent: 3607269 (1971-09-01), Young
patent: 3615488 (1971-10-01), Drago
patent: 3687669 (1972-08-01), Iijima
patent: 3708299 (1973-01-01), Shimamura

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