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

430591, 430592, 430594, G03C 184

Patent

active

042949165

ABSTRACT:
A photographic silver halide material is provided which comprises in at least one layer a solid dispersion of at least one water-insoluble methine dye of the formula ##STR1## wherein L and L' each represent an optionally substituted methine group, n is O, 1 or 2, Z represents the atoms necessary to complete an optionally substituted acidic carbocyclic or heterocyclic ring, Y represents the atoms necessary to complete an optionally substituted basic carbocyclic or heterocyclic ring, at least one of the rings Z and Y being substituted by a --COOH group or being substituted by a group which comprises a --COOH group. The solid dispersion of the dye is finely divided in the binder material of said layer, which is normally a filter or anti-halation layer. A marked increase of sharpness of the images obtained from photographic material containing in at least one layer the solid dyestuff dispersion can be observed.

REFERENCES:
patent: 3471293 (1969-10-01), hlschlager et al.
patent: 3480436 (1969-11-01), Wilson
patent: 3481927 (1969-12-01), Heseltine et al.
patent: 3540888 (1970-11-01), Mee
patent: 3560214 (1971-02-01), Ruda

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