Color diffusion transfer element with spacer layer containing pigment and scavenger for oxidized developing agent

Claim 2

A photographic element for a diffusion transfer process comprising a support having thereon (1) a layer containing a dye-providing compound capable of releasing or forming a diffusible dye or a precursor thereof as a result of development, (2) a silver halide photographic emulsion layer which is in a complementary color relationship with the dye-providing compound, and (3) a substantially non-sensitive spacing layer between said layers (1) and (2) containing a solid pigment, a hydrophilic colloid, and a nondiffusible compound capable of undergoing a redox reaction with the oxidation product of a silver halide developing agent under an alkaline condition.

Claim 3

A photographic element as in claim 1, wherein the silver halide photographic emulsion layer is formed of a direct positive silver halide photographic emulsion.

Claim 4

A photographic element as in claim 2, wherein the direct positive silver halide photographic emulsion is an internal latent image-type silver halide photographic emulsion.

Claim 5

A photographic element as in claim 2, wherein the direct positive silver halide photographic emulsion is a core/shell type internal latent image type silver halide photographic emulsion.

Claim 6

A photographic element as in claim 1, wherein the solid pigment in the spacing layer is titanium dioxide.

Claim 7

A photographic element as in claim 1, wherein the dye-providing compound is a dye-releasing redox compound.

Claim 8

A photographic element as in claim 6, wherein the dye-releasing redox compound is a negative-working dye-releasing redox compound.

Claim 9

A photographic element as in claim 1, wherein the nondiffusible compound in the spacing layer is a substantially colorless compound.

Claim 10

A photographic element as in claim 8, wherein the substantially colorless compound is a compound represented by formula (Ia) or (Ib) ##STR18## wherein R 1 , R 2 , R 3 , and R 4 each represents a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, an aryl group, an amino group, an alkoxy group, an aryloxy group, a thioalkyl group, an alkaneamido group, an arylamido group, an alkylsulfonyl group, an arylsulfonyl group, an alkylsulfamoyl group, an alkylcarbamoyl group, an arylcarbamoyl group, a sulfonic acid group or a salt thereof, or a carboxylic acid or a salt thereof, and one of said R 1 , R 2 , R 3 and R 4 is a ballast group or at least two of said R 1 , R 2 , R 3 and R 4 coact to function as a ballast group rendering the compound of formula (Ia) or (Ib) nondiffusible even under an alkaline condition; and R 5 and R 6 each represents a hydrogen atom or a protective group capable of being released under an alkaline condition or said R 5 and R 1 or said R 6 and R 2 together form a 5-membered or 6-membered ring.

Claim 11

A photographic element as in claim 8, wherein the substantially colorless compound is a compound represented by formula (II) ##STR19## wherein R 11 represents a hydrogen atom, an alkyl group, an alkylsulfonyl group, an arylsulfonyl group, an alkylaminosulfonyl group, an arylaminosulfonyl group, or a ballast group; R 12 represents a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an alkoxy group, an amido group, a sulfonamido group, or a ballast group; X represents (R 12 ) 2 or an atomic group forming a carbocyclic ring; R 13 represents a hydroxy group or a group capable of being decomposed under an alkaline condition to provide a hydroxy group; (Ballast) represents a ballast group rendering the compound of formula II nondiffusible even under an alkaline condition; NHR 11 is at an o-position or a p-position with respect to R 13 ; and n represents 1 or 2.

Claim 12

A photographic element as in claim 8, wherein the substantially colorless compound is a compound represented by formula (III) ##STR20## wherein R 21 represents an unsubstituted or substituted alkyl group having from 1 to 20 carbon atoms, an unsubstituted or substituted aryl group, or a ballast group; (Ballast) represents a ballast group rendering the compound of formula (III) nondiffusible even under an alkaline condition; and m represents 1, 2 or 3.

Claim 13

A photographic element as in claim 8, wherein the substantially colorless compound is a compound represented by formula (IV) ##STR21## wherein R 31 represents an alkyl group or an aryl group; R 32 represents an alkyl group or an aryl group; and R 33 represents a hydrogen atom or a group capable of being released under an alkaline condition; and R 31 or R 32 is a ballast group or R 31 and R 32 coact to function as a ballast group rendering the compound of formula (IV) nondiffusible even under an alkaline condition.

Claim 14

A photographic element as in claim 8, wherein the substantially colorless compound is a compound represented by formula (V) ##STR22## wherein R 41 represents an unsubstituted or substituted aryl group; R 42 represents a hydrogen atom, an alkyl group, an aryl group, an acyl group, an amido group, or an ester group; Z represents an atomic group forming a 5-membered or 6-membered ring together with C, N and S; and R 41 or R 42 is a ballast group or R 41 and R 42 coact to function as a ballast group rendering the compound of formula (V) nondiffusible even under an alkaline condition.

Claim 15

A photographic element as in claim 1, wherein the nondiffusible compound of layer (3) is included in an amount of from about 0.1 mol% to about 500 mol%, based on the amount of dye-releasing redox compound associated therewith.

Claim 16

A photographic element as in claim 14, wherein the nondiffusible compound of layer (3) is included in an amount of from about 1 mol% to about 200 mol%, based on the amount of dye-releasing redox compound associated therewith.

Claim 17

A photographic element as in claim 1, wherein an amount of the solid pigment of the layer (3) is about 3 g/m 2 or less.

Claim 18

A photographic element as in claim 1, wherein an amount of the hydrophilic colloid of the layer (3) is about 3 g/m 2 or less.