Photographic materials curve shape stabilized with carboxy substituted 4-thiouracils

Claim 2

The element of claim 1 wherein the carboxy substituted 4-thiouracil is 1-carboxymethyl-5H-4-thiocyclopenta-(d)uracil.

Claim 3

The element of claim 1 wherein at least one hydrophilic colloid layer comprises a dispersion of a water-insoluble organic fluorescent agent in a solvent having the following formula:

Claim 4

The element of claim 1 wherein the support is a white reflecting support.

Claim 5

The element of claim 4 wherein the support is a white reflecting support.

Claim 6

The element of claim 6 wherein the red-sensitive layer containing the cyan-forming coupler is the outermost light sensitive layer.

Claim 7

The element of claim 1 wherein the blue-sensitive layer is disposed adjacent the support.

Claim 8

The element of claim 7 wherein the blue-sensitive layer is disposed adjacent the support.

Claim 9

The element of claim 1 wherein the cyan color-forming coupler is a phenolic compound.

Claim 10

The element of claim 1 wherein the magenta color-forming coupler is a pyrazolone.

Claim 11

The element of claim 1 wherein the converted-halide silver halide graIns are surface sensitized by a sensitizer selected from the group consisting of sulfur, selenium and tellurium.

Claim 12

A photographic element comprising a support having coated thereon at least three superimposed hydrophilic colloid layers, the layer adjacent the support comprising a coupler capable of forming a yellow dye upon color development, surface sensitized converted-halide silver halide grains sensitive to blue radiation and from about 50 to about 500 mg/mole of silver of at least one carboxy substituted 4-thiouracil; an outermost light sensitive layer comprising a coupler capable of forming a cyan dye upon color development and surface sensitized converted-halide silver halide grains sensitive to red radiation; and another layer comprising a coupler capable of forming a magenta dye upon color development and surface sensitized converted-halide silver halide grains sensitive to green radiation; the halide in said converted-halide silver halide grains consisting of at least about 50 mole percent bromide, up to 10 mole percent iodide and any remaining halide being chloride; whereby control of the characteristic D log E curve shape is improved and stability on keeping and Dmax are increased.

Claim 13

A photographic element comprising a white reflecting support having coated thereon at least three super-imposed gelatin layers, the layer adjacent the white reflecting support comprising a coupler capable of forming a yellow dye upon color development, sulfur, selenium or tellurium surface sensitized converted-halide silver halide grains sensitive to blue radiation and from about 50 to about 500 mg/mole of silver of 1-carboxymethyl-5H-4-thiocyclopenta(d)uracil; an outermost light sensitive layer comprising a phenolic coupler capable of forming a cyan dye upon color development and sulfur, selenium or tellurium surface sensitized converted-halide silver halide grains sensitive to red radiation; and another layer comprising a pyrazolone coupler capable of forming a magenta dye upon color development, sulfur, selenium or tellurium surface sensitized converted-halide silver halide grains sensitive to green radiation; the halide in said converted-halide silver halide grains consisting of at least 50 mole percent bromide, up to 10 mole percent iodide and any remaining halide being chloride; whereby control of the characteristic D log E curve shape is improved and stability on keeping and Dmax are increased.