new pimp, a entwicklungsbeschleuniger may release

摘要

The present invention relates to a new coupler which is capable of releasing a development accelerator having the formula: CHEM wherein COUP is a coupler moiety, T is a timing group and n is 0, 1 or 2, A is a group capable of being adsorbed to the silver halide surface, L is a linking group and r is 0 or 1, and R1 and R2 are independently selected from an alkyl group, substituted or unsubstituted, and an aryl group, substituted or unsubstituted. The present invention also concerns a photographic silver halide recording material containing such a coupler and further relates to a process for processing such a material. The invention provides a new DARC compound showing improved speed increase without undue fog formation.