Spectral sensitization of photographic material with natural col

Details Spectral sensitization of photographic material with natural col Spectral sensitization of photographic material with natural col

1976-03-11

1977-08-09

Klein, David

Gas separation: apparatus

Magnetic separating means

96 16, 96 88, 96 92, 96 93, 96113, 96114, 961143, 961147, 961148, 961149, 96120, 96122, 96123, 96124, 96126, 96127, 96128, 96129, 96130, 96131, 96132, 96133, 96134, 96135, 96136, 96137, 96138, 96139, 96140, 96141, 96142, 96143, G03C 102, G03C 108, G03C 116, G03G 509

Patent

active

040408256

ABSTRACT:
The present invention relates to light-sensitive photographic material with a light-sensitive heavy metal compound, e.g. a silver halide, and a spectral sensitizer. The spectral sensitizer is a compound in which the radicals of a sensitizing dyestuff are covalently bonded to amino, imino, hydroxyl, mercapto, carboxylic acid or carboxylic acid amide groups of a natural hydrophilic colloid, preferably gelatin.
The invention also relates to new sensitizing 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 hydrophilic colloid.

REFERENCES:
patent: T896035 (1972-03-01), Rauner et al.
patent: 2639282 (1958-05-01), Sprague et al.
patent: 3622316 (1971-11-01), Bird et al.

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