Color-developing agent, silver halide photographic light-sensiti

Details Color-developing agent, silver halide photographic light-sensiti Color-developing agent, silver halide photographic light-sensiti

1996-11-26

1999-02-23

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Color imaging process

Using identified radiation sensitive composition in the...

430264, 430435, 430440, 430446, 430448, 430483, 430566, G03C 142

Patent

active

058742034

ABSTRACT:
There is disclosed novel color-developing agents of the formula (I). There is also disclosed silver halide photographic light-sensitive materials and image-forming methods, using the color-developing agent. The color-developing agent is excellent in color-forming property, and the image obtained from the color-developing agent is good in hue. ##STR1## wherein R.sub.1 to R.sub.4 each represent a group of nonmetal atoms required to form, together with the carbon atom, a monocyclic 5-membered aromatic ring or a 5-membered aromatic ring condensed with another ring, with the proviso that at least two of R.sub.1 to R.sub.4 are nitrogen atoms; and Z represents an acyl group, a carbamoyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, a sulfonyl group, a sulfamoyl group, an amidino group, or an imidoyl group.

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