Color photographic silver halide material

US6063557A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Cuong Ly · Cologne, DE
• Maria Nietgen · Leverkusen, DE
• Michael Missfeldt · Leichlingen, DE
• Heinz-Horst Teitscheid · Neunburg vorm Wald, DE
• Edgar Draber · Odenthal, DE
• Markus Geiger · Langenfeld, DE

Key dates

• Filing date: Sep 2, 1998
• Grant date: May 16, 2000
• Expiry date: Sep 2, 2018

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C2001/092
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A color photographic silver halide material in which at least one of the blue-sensitive silver halide emulsions is doped with mercury and is spectrally sensitised with a sensitising dye of formula (I) ##STR1## wherein X.sub.1 and X.sub.2, independently of each other, denote O, S, Se, NR, PA1 R denotes alkyl or carboxyalkyl, PA1 R.sub.1 and R.sub.2 or R.sub.2 and R.sub.3 denote the remaining members for the completion of a phenanthro- or anthraazole ring, and the remaining R.sub.1 or R.sub.3 radical denotes a hydrogen atom, PA1 R.sub.4 and R.sub.5, independently of each other, denote a hydrogen atom, alkyl or aryl, or PA1 R.sub.4 and R.sub.5 jointly denote the remaining members of an unsubstituted or substituted benzazole, naphthazole, phenanthro- or anthraazole, PA1 S.sub.1 and S.sub.2, independently of each other, denote alkyl, sulphoallyl or carboxyalkyl, and PA1 M.sup.+ denotes a cation which is possibly necessary for charge equalisation, is distinguished by an improved latent image stability.