Abstract: Useful 2-equivalent yellow couplers correspond to the formula ##STR1## in which A represents a yellow coupler radical connected through the coupling positionPy represents a pyridine group connected to the N through one of its carbon atomsR represents alkyl, aryl or dialkylaminoThe couplers provide high color density and low color fog.

Abstract: Two-equivalent pivalylacetanilide couplers having attached to the reactive methylene thereof a 5-membered (simple) or 6-membered (simple or condensed) heterocyclic nucleus through nitrogen atoms respectively in 1 position and 3 position thereof, said 5-membered nucleus including nitrogen atoms in 2 and 4 positions respectively bonded through double bonds to carbon atoms in 3 and 5 positions thereof and said 6-membered heterocyclic nucleus being chosen within the class including 1,2,3-benzotriazine-4-(3H)-one, 1,3-benzodiazine-4-(3H)-one and pyrimidine-4-(3H)-one nucleus.