Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Identified radiation sensitive composition with color...
Patent
1995-07-10
1997-03-11
Letscher, Geraldine
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Identified radiation sensitive composition with color...
430543, 430387, G03C 108, G03C 726, G03C 732
Patent
active
056100035
ABSTRACT:
An improved photographic element comprises a support bearing at least one silver halide emulsion layer having associated therewith a two-equivalent 5-pyrazolone magenta-dye-forming coupler. The coupler has a coupling-off group in the 4-position and an activity-modifying ballasting group in the 3-position. The ballasting group includes a hydrogen-bonding substituent and provides a unique combination of steric, hydrophobic and conformational properties which allows the coupling activity to be controlled.
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Eastman Kodak Company
Letscher Geraldine
Lorenzo Alfred P.
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