Spectral sensitization of photographic material and new spectral

Details Spectral sensitization of photographic material and new spectral Spectral sensitization of photographic material and new spectral

1977-03-25

1979-02-06

Waltz, Thomas

Harness for working animal

542434, 542437, 542451, 542452, 542471, 542474, 542475, 542476, C09B 2306, C09B 2304

Patent

active

041385519

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: T889016 (1971-08-01), Van Lare et al.
patent: 2776280 (1957-01-01), Brooker et al.
patent: 3635956 (1972-01-01), Krapcho
patent: 3681080 (1972-08-01), Nakagawa et al.
patent: 3684517 (1972-08-01), Brooker et al.
patent: 3726684 (1973-04-01), Riester et al.

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