Photographic element containing an azopyrazolone masking coupler

Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Identified radiation sensitive composition with color...

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430504, 430546, 430554, 430555, 430558, 430607, 430359, G03C 108, G03C 726, G03C 732

Patent

active

054665680

ABSTRACT:
A photographic element and imaging process used therewith provides reduced fogging where the element comprises a light sensitive silver halide layer containing (1) an azopyrazolone masking coupler and (2) a ballasted aromatic nitro compound having a reduction peak potential which is more positive than -1.3 V vs. the Standard Calomel Electrode.

REFERENCES:
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patent: 4163670 (1979-08-01), Shiba et al.
patent: 4277559 (1981-07-01), Jaeken et al.
patent: 4427763 (1984-01-01), Lohmann et al.
patent: 4977072 (1990-12-01), Renner et al.
patent: 4992357 (1991-02-01), Haga et al.
patent: 5238797 (1993-08-01), Hirabayashi et al.

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