Colour photographic recording material

US5922524A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Ralf Buscher · Lohmar, DE
• Peter Bell · Neunburg vorm Wald, DE
• Hans-Ulrich Borst · Elsdorf, DE
• Jorg Siegel · Leverkusen, DE
• Johannes Willsau · Leverkusen, DE
• Heinrich Odenwalder · Leverkusen, DE

Key dates

• Filing date: Feb 3, 1997
• Grant date: Jul 13, 1999
• Expiry date: Feb 3, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/156
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A colour photographic recording material having camera sensitivity, possessing on a transparent support at least one silver halide emulsion layer unit which is sensitive to part of the visible spectrum and consists of at least the following constituent layers: PA1 a) a spectrally sensitised silver halide emulsion layer containing an effective quantity of a FAR coupler (coupler, which during coupling releases groups producing fogging nuclei) and optionally a colour coupler, the latter during the colour development process coupling with a dye of which the colour is complementary to the spectral sensitisation of layer a), and PA1 b) a fine-grained silver halide emulsion layer having low light-sensitivity, of which the silver halide grains are not spectrally sensitised, being a layer adjacent to layer a), with layer b) containing a colour coupler which during the colour development process couples with a dye of which the colour is complementary to the spectral sensitisation of layer a) and the molar quantity of colour couplers in layer b) being greater than in layer a), is distinguished by improved graininess at higher sensitivity.