Formation of azine dyes

Details Formation of azine dyes Formation of azine dyes

1975-03-26

1977-01-25

Klein, David

Gas separation: apparatus

Electric field separation apparatus

Including gas flow distribution means

96 9, 96 22, 96 55, G03C 530, G03C 704, G03C 716, G03C 700

Patent

active

040049264

ABSTRACT:
A method of producing a colored image by developing a latent silver image obtained by the image-wise photo-exposure of a photosensitive silver halide material, wherein the development is carried out with p-phenylenediamine corresponding to the following general formula: ##STR1## wherein: EACH OF R'.sub.1, R'.sub.2, R'.sub.3, and R'.sub.4 (same or different) represents an alkyl group, in the presence of

REFERENCES:
patent: 3245787 (1966-04-01), Willems et al.
patent: 3265502 (1966-08-01), Willems et al.
patent: 3447923 (1969-06-01), Jaeken

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