Photographic element for color diffusion transfer with two neutr

Details Photographic element for color diffusion transfer with two neutr Photographic element for color diffusion transfer with two neutr

1984-07-16

1985-11-05

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Transfer procedure between image and image layer, image...

Diffusion transfer process, element, or identified image...

430216, 430237, G03C 554, G03C 140

Patent

active

045514100

ABSTRACT:
In a color diffusion transfer photographic element, a novel neutralization system for reducing the pH of an alkaline processing solution comprises at least two steps wherein the first step pH of the processing solution is reduced to a range in which development and dye release reactions are substantially discontinued but in which diffusion of dyes for forming transfer images continues, and in the second step pH is further reduced and allows to reduce at a neutralization rate lower than the rate in the first step to a final pH of which the transfer image formed is stable upon storage for a long period.

REFERENCES:
patent: 3734727 (1973-05-01), Milligan
patent: 4323644 (1982-04-01), Nakamura et al.
patent: 4356249 (1982-10-01), Abel et al.

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