Spectral sensitisation of photographic material and new...

Details Spectral sensitisation of photographic material and new... Spectral sensitisation of photographic material and new...

C - Chemistry, Metallurgy

09

B

260/382, 96/73

C09B 23/00 (2006.01) C09B 62/002 (2006.01) G03C 1/12 (2006.01) G03C 1/705 (2006.01)

Patent

CA 1056389

Abstract of the Disclosure The present invention relates to light-sensitive photo- graphic material with a light-sensitive heavy metal com- pound, e.g. a silver halide, and a spectral sensitiser. The spectral sensitiser is a compound in which the radicals of a sensitising dyestuff are covalently bonded to amino, imino, hydroxyl, mercapto, carboxylic acid or carboxylic acid amide groups of a natural hydrophilic colloid, prefer- ably gelatin. The invention also relates to new sensitising dyes which are dinuclear cyanine dyes or merocyanine dyes which have attached either to a heterocyclic nucleus of the dye or to its methine chain a group which is reactive with a hydro- philic collid.

247880

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