Color photographic sensitive materials

A process for forming color images which comprises imagewise exposing a color photographic sensitive material comprising at least one direct reversal silver halide emulsion layer associated with a diffusible dye-releasing redox compound on a support and characterized by the presence of a compound of the formula (I):

• ##STR37## wherein A.sub.1 and A.sub.2 each represents a hydrogen atom or a hydrolyzable group, P, Q and R which may be the same or different each represents a hydrogen atom, an alkyl group, an aryl group, an alkylthio group, an arylthio group, a hydroxyl group, a halogen atom, an alkoxy group, an aryloxy group, a heterocyclic group or an --S--Z.sup.2 group, Z.sup.1 and Z.sup.2 may be the same or different and each represents an unsaturated heterocyclic residue which is photographically inactive when bonded to the hydroquinone through the sulfur moiety, and --S--Z.sup.1 or --S--Z.sup.2 is an atomic group which when released by oxidation exhibits a, development inhibiting function;
• at least one of P and Q is an alkylthio group or an arylthio group, and at least one of P, Q and R contains a ballast group, in an amount of about 5 to 2000 mg per 100 millimols silver in the emulsion, in at least one of (1) a layer containing said redox compound, said layer containing said redox compound being adjacent said silver halide emulsion layer, (2) said direct reversal silver halide emulsion layer and (3) said emulsion layer containing said redox compound, and then developing thus exposed color photographic sensitive material with a black-and-white developer containing a 3-pyrazolidinone.