Prevention of fog formation in color photographic process

Details Prevention of fog formation in color photographic process Prevention of fog formation in color photographic process

1977-04-19

1979-04-03

Kelley, Mary F.

Gas separation: apparatus

Electric field separation apparatus

Including gas flow distribution means

96 22, 96 50A, 96 61M, 96 63, G03C 538, G03C 716, G03C 526, G03C 532

Patent

active

041475461

ABSTRACT:
A photographic process for forming photographic images comprising processing a photographic element comprising a support and at least a silver halide photographic emulsion layer having image-wise distributed therein a material possessing a catalytic action with a cobalt (III) complex with a photographic processing solution containing at least a cobalt (III) complex having a coordination number of 6 in the presence of a primary aromatic amine developing agent, in which the formation of fog is prevented by contacting the photographic processing solution with one side of a fine open-cell porous diaphragm of a hydrophobic material, such as a porous Teflon film, the other side of which is in contact with an acid solution, whereby fogging components in the processing solution are removed from the processing solution into the acid solution through the porous diaphragm.

REFERENCES:
patent: 3746543 (1973-07-01), Iwano et al.
patent: 3846130 (1974-11-01), Porol et al.
patent: 3923511 (1975-12-01), Bissonette
patent: 3989526 (1976-11-01), Bissonette
patent: 3997347 (1976-12-01), Parsonage
patent: 4040834 (1977-08-01), Iwano

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