| 摘要 |
A color photographic element comprising a film support and a first radiation-sensitive layer further includes an oxidized developer-scavenging naphtholic coupler that is substantially immobilized in the element but forms a dye that can be removed from the material during photographic processing. The naphtholic coupler, which comprises a dye-forming moiety and a ballasted, substantially photographically inert coupling-off moiety, has the structure where R1 and R2 each independently represents hydrogen, an alkyl group, an alkoxyalkyl group, or a hydroxyalkyl group, R1 and R2 together containing a total of up to 4 carbon atoms; R3 represents hydrogen, halo, or an alkoxy, an alkylcarbonamido, an alkylsulfonamido, a carbamoyl, or a sulfamoyl group containing up to 4 carbon atoms; R1, R2, and R3 of the dye-forming moiety are each devoid of alkali-solubilizing groups and together allow substantially complete removal during photographic processing of the dye formed by the naphtholic coupler; R4, R5 and R6 represent substituent groups that together comprise ballast sufficient to substantially immobilize the coupler in the color photographic element and together render the coupling-off moiety substantially photographically inert, at least one of R4, R5 and R6 comprises at least 8 carbon atoms; and R5 is selected from a group of substituent groups effective to substantially prevent formation of dye and/or stain by reaction of the coupling-off moiety with oxidized developer.
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