发明授权
- 专利标题: Photographic material having improved color reproduction
- 专利标题(中): 具有改进的色彩再现的照相材料
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申请号: US09716101申请日: 2000-11-17
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公开(公告)号: US06558893B1公开(公告)日: 2003-05-06
- 发明人: Richard L. Parton , Andrei Andrievsky , Thomas L. Penner , William J. Harrison
- 申请人: Richard L. Parton , Andrei Andrievsky , Thomas L. Penner , William J. Harrison
- 主分类号: G03C110
- IPC分类号: G03C110
摘要:
This invention comprises a silver halide photographic material comprising at least one silver halide emulsion comprising silver halide grains having associated therewith a combination of two or more dyes comprising: (a) a first dye which is a cyanine dye of formula Ia and has a net charge of zero or −1 wherein the substituents are as defined in the specification; (b) a second dye which has at least one substituent that has a positive charge, and is a cyanine dye a merocyanine dye, arylidene dye, complex cyanine dye, complex merocyanine dye, homopolar cyanine dye, hemicyanine dye, styryl dye, hemioxonol dye, oxonol dye, anthraquinone dye, triphenylmethane dye, azo dye type, azomethines, or a coumarin dye, with the proviso that if the second dye is a cyanine dye, it is of formula IIa: wherein the substituents are as defined in the specification; and wherein (c) the wavelength of maximum light absorption, in nanometers (nm), of the first dye and the wavelength of maximum light absorption of the second dye differ by at least 10 nm.