Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Identified radiation sensitive composition with color...
Patent
1989-09-20
1991-01-29
Michl, Paul R.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Identified radiation sensitive composition with color...
430553, 430386, 430387, G03C 734
Patent
active
049886142
ABSTRACT:
A silver halide photographic light-sensitive material containing a novel magenta dye-forming coupler. The coupler is represented by the following Formula I: ##STR1## wherein R.sub.1 is a hydrogen atom or a substituent; R.sub.2 is a substituted or unsubstituted aryl group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted heterocyclic group or a substituted or unsubstituted amino group; provided, R.sub.1 and R.sub.2 are allowed to bond together so as to complete a ring; Z is a hydrogen atom or a group capable of being split off upon coupling reaction with the oxidized product of a an aromatic primary amine developing agent; and EWG is an electron attractive group having a Hammet's .sigma. p value of more than 0.3. The photographic material has excellent color reproducibility and improved in color forming efficiency and graininess of images.
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The Theory of the Photographic Process, James, 4th Edition, p. 338.
Ishige Osamu
Kohno Junichi
Masukawa Toyoaki
Ninomiya Hidetaka
Bierman Jordan B.
Konica Corporation
Michl Paul R.
Wright Lee C.
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