PHOTOGRAPHIC RECORDING MATERIAL CONTAINING A PRECURSOR OF A PHOTOGRAPHICALLY-ACTIVE COMPOUND

摘要

"Photographic recording material containing a precursor of a photographically active compound" Precursor compounds from which photographicallyactive compounds are released with a time delay correspond to the following general formula < IMG > wherein A represents the residue of a compound which undergoes oxidative coupling; X represents -O-, -S- or -NR1 -; Y represents a releasable group which may consist of or contain the residue of a photographicallyactive compound; and R represents a group for controlling the kinetics of release. Advantageous pictorial properties (interimage effect, edge effect, modulation transfer function) are obtained with compound according to the present invention if the photographically-active residue is the residue of a development inhibitor.