PHOTOGRAPHIC RECORDING MATERIAL HAVING A PRECURSOR OF A PHOTOGRAPHICALLY ACTIVE COMPOUND

Precursor compounds from which photographically-active compounds are released with a time delay correspond to the following general formula 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 con...

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Hauptverfasser: BERGTHALLER, PETER, MATEJEC, REINHARD, ODENWALDER, HEINRICH
Format: Patent
Sprache:eng ; ger
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Zusammenfassung:Precursor compounds from which photographically-active compounds are released with a time delay correspond to the following general formula 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 photographically-active compound; and R represents a group for controlling the kinetics of release. Advantageous pictorial properties (inter-image effect, edge effect, modulation transfer function) are obtained with compounds according to the present invention if the photographically-active residue is the residue of a development inhibitor.