Processes for producing positive or negative dye images using hi

Details Processes for producing positive or negative dye images using hi Processes for producing positive or negative dye images using hi

1978-02-02

1979-06-19

Louie, Jr., Won H.

Gas separation: apparatus

Electric field separation apparatus

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

96 55, G03C 700, G03C 564

Patent

active

041585658

ABSTRACT:
Processes are disclosed for producing dye images employing photographic elements which comprise a support and coated thereon, at least one radiation-sensitive colorforming layer unit. This layer unit includes a substantially uniform distribution of catalyst and a radiationsensitive, high iodide silver halide emulsion. A first method for producing dye images after imagewise exposure of the photographic element comprises the steps of imagewise poisoning the catalyst with iodide ion by developing the silver iodide containing silver halide emulsion and thereafter employing the remaining unpoisoned catalyst to permit a redox reaction between a peroxide oxidizing agent and a dye-image-generating reducing agent. In a preferred element the high iodide silver halide emulsion is comprised of multifaceted, radiation-receptive silver iodide crystals and silver chloride crystals forming epitaxial junctions with the silver iodide crystals. A dye image of opposite sense can be produced using the preferred element by the steps of poisoning the catalyst; selectively developing the silver chloride portion of the silver halide emulsion; and amplifying the resulting silver image using the peroxy redox amplification reaction.

REFERENCES:
patent: 3674490 (1972-07-01), Matejec
patent: 3862842 (1975-01-01), Bissonette
patent: 4002477 (1977-01-01), Bissonette
patent: 4089685 (1978-05-01), Bissonette
patent: 4094684 (1978-06-01), Maskasky

Affiliated with

Also associated with

Rating

Processes for producing positive or negative dye images using hi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Processes for producing positive or negative dye images using hi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Processes for producing positive or negative dye images using hi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-55132