Metal image formation process

Details Metal image formation process Metal image formation process

1978-02-28

1978-12-12

Louie, Jr., Won H.

Gas separation: apparatus

Electric field separation apparatus

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

96 48PD, 96 76R, G03C 554, G03C 524

Patent

active

041294459

ABSTRACT:
A process for forming metal images of, e.g., copper at high sensitivity by imagewise depositing silver or silver ion on nuclei for physical development distributed on or in a support of an image forming photographic element or in a layer formed on the support of the photographic element to deactivate the physical developing activity of the active nuclei and then bringing the image forming element having the layer of the nuclei for physical developing which were not deactivated into contact with a physical developer containing a reducible heavy metal salt and a reducing agent to imagewise deposit the heavy metal, such as copper, on the remaining nuclei for physical development. A preferred embodiment comprises performing the above image forming process while depositing imagewise the silver or silver ion on the nuclei for physical development from the unexposed portions of an image-exposed silver halide photographic emulsion layer formed on the image forming photographic element by diffusion transfer.

REFERENCES:
patent: 3512972 (1970-05-01), Case
patent: 3656952 (1972-04-01), Miller
patent: 3704126 (1972-11-01), Land et al.
patent: 3822127 (1974-01-01), Tsuboi et al.

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