Improved hue, speed of dye formation and reduced staining are provided by a photographic element comprising a light-sensitive silver halide layer having associated therewith a 1-phenyl-3-anilino-pyrazolo-5-one coupler comprising a ballasted parent and a coupling-off group and containing substituents on the 1-phenyl and 3-anilino rings of the parent having Hammett sigma values which together sum to at least 1.1, the coupler further having at the 4-position of the pyrazolone ring a coupling-off group comprising a phenylthio group containing a carbonamido substituent in the position para to the sulfur on the phenylthio ring with the substituents on the phenylthio ring selected such that the calculated log P of the thiophenol corresponding to the coupling-off group is at least 4. ##STR1##
一种摄影元素提供了改进的色调、
染料形成速度和减少的染色,该元素包括与其相关联的1-苯基-3-
苯胺基
吡唑-5-酮
偶联剂,该
偶联剂包括一个带有负载基的母体和一个偶联基团,并且在母体的1-苯基和3-
苯胺环上含有哈密特西格玛值之和至少为1.1的取代基,
偶联剂在
吡唑酮环的4位具有一个偶联基团,该偶联基团包括一个苯
硫基团,在苯
硫环上与
硫相邻的位置含有一个碳酰基取代基,所述苯
硫环上的取代基被选为使得相应的偶联基团的噻
苯酚的计算对数P至少为4。##STR1##