Photographic silver halide material containing a dye filter or a

Details Photographic silver halide material containing a dye filter or a Photographic silver halide material containing a dye filter or a

1980-04-30

1981-10-13

Downey, Mary F.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Antihalation or filter layer containing

430595, G03C 184

Patent

active

042949173

ABSTRACT:
A photographic silver halide material is provided which comprises in at least one layer a solid dispersion of a water-insoluble dye of the formula ##STR1## wherein each of L, L' and L" are an optionally subsituted methine group, n is 0 or 1, Q is an optionally substituted aryl group or an optionally substituted heteroaromatic group, R.sub.1 represents a hydrogen atom or an optionally substituted alkyl, aralkyl, cycloalkyl, aryl or heterocyclic radical or an optionally substituted amino group, R.sub.2 represents a hydrogen atom or a hydroxy, amino, --CN, --COOR.sup.1, --CONR.sup.1 R.sup.2 or --COR.sup.1 group or an optionally substituted alkyl, aralkyl, cycloalkyl, aryl or heterocyclic radical, and R.sub.3 represents a --CN, --COOR.sup.3, --CONR.sup.3 R.sup.4, --SO.sub.3 H, --SO.sub.3.sup..crclbar. or --COR.sup.3 group, where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each independently represent a hydrogen atom or an optionally substituted alkyl, aralkyl, cycloalkyl, aryl or heterocyclic radical, in a binder.
The solid dispersion of the dye is finely divided in the binder material of said layer which normally is a filter or anti-halation layer. A marked increase in sharpness of the images obtained from photographic material containing in at least one layer the solid dye dispersion can be observed.

REFERENCES:
patent: 2036546 (1936-04-01), Schneider
patent: 2533472 (1950-12-01), Keyes

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