Photographic elements containing magenta couplers and process for using same
AssigneeEastman Kodak Company
InventorsStephen P. Singer, Paul B. Merkel, Bernard Arthur J. Clark, Paul Louis R. Stanley
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AssigneeEastman Kodak Company
InventorsStephen P. Singer, Paul B. Merkel, Bernard Arthur J. Clark, Paul Louis R. Stanley
Estimating the term…
A photographic element contains a light-sensitive silver halide layer having associated therewith a coupler which is a pyrazolone compound with a coupling-off substituent at the -4-position, said compound having the formula: ##STR1## wherein each R.sup.1 is independently a substituted or unsubstituted alkylsulfonyl or arylsulfonyl group; each R.sup.2 and R.sup.3 is independently a substituent; R.sup.4, R.sup.5, and R.sup.6 are independently hydrogen or substituted or unsubstituted alkyl groups; m and n are independently 0 or 1 but both are not 0; x1 and x2 are independently 0 to 5; and y is 0 to 3; provided that each of R.sup.3, R.sup.4, R.sup.5, and R.sup.6 is selected such that the calculated log P of the thiophenol corresponding to the substituent at the 4-position of the pyrazolone is at least 4. The photographic element provides an improved combination of low continued coupling together with a magenta hue exhibiting a long wavelength of maximum absorption.
A photographic element comprising a light-sensitive silver halide layer having associated therewith a coupler which is a pyrazolone compound with a coupling-off substituent at the -4-position, said compound having the formula:
Dependencies are inferred from the claim text.