Development processing method

Details Development processing method Development processing method

1997-11-21

1999-10-26

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Post imaging processing

Developing

430445, 430446, 430488, G03C 529

Patent

active

059725800

ABSTRACT:
A development processing method comprises: exposing a silver halide light-sensitive material comprising a support having thereon at least one light-sensitive silver halide emulsion layer; and developing said exposed light-sensitive material with a developing solution, wherein at least one of said silver halide emulsion layer and other hydrophilic colloidal layers contains at least one hydrazine derivative, and wherein said developing solution is substantially free from a dihydroxybenzene compound, has a pH of from 9.0 to 10.5, and contains (1) at least one ascorbic acid derivative developing agent, (2) at least one aminophenol auxiliary developing agent and (3) a specific mercaptopyrimidine compound. The processing method provides a high-contrast image required in the field of graphic arts using a developing solution having no problem with respect to the ecosystem and working environment, without causing silver stain even at a low replenishment rate.

REFERENCES:
patent: 5264323 (1993-11-01), Purol et al.
patent: 5503965 (1996-04-01), Okutsu
patent: 5506092 (1996-04-01), Ishikawa et al.
patent: 5508153 (1996-04-01), Ishikawa et al.
patent: 5618661 (1997-04-01), Sampei
patent: 5707790 (1998-01-01), Yanagisawa

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