The composition desribs 2 eguivalent magenta color coupler of sulphide type comparing with 4 equivalent color coupler to have higher photographic activity and stability and explains difference between it and DIR magenta color coupler.

• 对硫醚类二当量品红成色剂与四当量成色剂进行了比较，说明所述成色剂有更高照相活性与稳定性，并解释了与 D I R 品成色剂的区别。