Photographisches Aufzeichnungsmaterial für beschleunigte Entwicklung

This invention relates to a photographic element comprising a support and at least two silver halide emulsion layers wherein at least one emulsion layer contains an electron transfer agent releasing compound represented by the formula: CAR-(L)n-ETA wherein: CAR is a carrier moiety which is capable o...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: LUNT, SHARON R, FRIDAY, JAMES A, SUTTON, SCOTT C
Format: Patent
Sprache:ger
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Beschreibung
Zusammenfassung:This invention relates to a photographic element comprising a support and at least two silver halide emulsion layers wherein at least one emulsion layer contains an electron transfer agent releasing compound represented by the formula: CAR-(L)n-ETA wherein: CAR is a carrier moiety which is capable of releasing -(L)n-ETA on reaction with oxidized developing agent; L is a divalent linking group, n is 0, 1 or 2; and ETA is a releasable 1-aryl-3-pyrazolidinone electron transfer agent having a calculated log partition coefficient (c log P) greater than or equal to 2.40 bonded to L or CAR through either the nitrogen atom in the 2-position or the oxygen attached to the 3-position of the pyrazolidinone ring; and at least one soluble mercaptan releasing compound.