Photographic products and processes with scavengers for silver ions or silver complexes

Claim 2

In a photographic product for providing a multicolor image comprising a plurality of layers which are maintained intact subsequent to image formation including a support, at least two selectively sensitive silver halide emulsion layers on said support, each of said emulsion layers having associated therewith an image dye-providing compound capable of undergoing silver ion assisted cleavage in the presence of an imagewise distribution of silver ions and/or soluble silver complex to provide a color-providing moiety in an imagewise distribution corresponding to said distribution of silver ions and/or soluble silver complex to form a dye image: the improvement which comprises including a silver halide developing agent in one of the afore said layers or in a separate layer, said developing agent being so positioned and/or so constituted that it is made available to reduce said silver ions and/or soluble silver complex at a predetermined time after but not prior to substantially complete formation of said dye image.

Claim 3

A photographic product as defined in claim 1 which includes an acid-reacting layer.

Claim 4

A photographic product as defined in claim 2 wherein said selectively sensitive emulsion layers are a red-sensitive emulsion, a green-sensitive emulsion and a blue-sensitive emulsion, and said image dye-providing compounds associated with said silver halide emulsions are, respectively, a cyan image dye-providing compound, a magenta image dye-providing compound and a yellow image dye-providing compound.

Claim 5

A photographic product as defined in claim 3 wherein each said image dye-providing compounds is substantially non-diffusible and undergoes cleavage to release a diffusible color-providing moiety.

Claim 6

A photographic product as defined in claim 4 wherein said diffusible color-providing moiety is a diffusible dye and said photographic product includes a superposed image-receiving layer so positioned as to be capable of receiving by diffusion transfer an imagewise distribution of each said diffusible dye.

Claim 7

A photographic product as defined in claim 5 wherein said product includes means for providing a light-reflecting layer between said image-receiving layer and said silver halide emulsion layer to mask said emulsion layers after development thereof and to provide a white background for viewing a dye image in said image-receiving layer.

Claim 8

A photographic product as defined in claim 6 which includes a second support and additionally includes means for applying an aqueous alkaline processing composition.

Claim 9

A photographic product as defined in claim 7 wherein said silver halide emulsion layers and their associated image dye-providing compounds are carried on said support, said image-receiving layer is carried on said second support and said means for applying an aqueous alkaline processing composition is positioned to provide a substantially uniform layer of processing composition between the outermost layer carried on said support and the outermost layer carried on said second support.

Claim 10

A photographic product as defined in claim 8 wherein said means for providing a light-reflecting layer comprises a white pigment dispersed in said processing composition.

Claim 11

A photographic product as defined in claim 7 wherein said image-receiving layer is carried on said support and said silver halide emulsion layers and their associated image dye-providing compounds are disposed over said image-receiving layer, said acid-reacting layer is carried on said second support and said means for applying an aqueous alkaline processing composition is positioned to provide a substantially uniform layer of processing composition between the outermost layer carried on said support and the outermost layer carried on said second support.

Claim 12

A photographic product as defined in claim 10 wherein said means for providing a light-reflecting layer comprises a preformed layer of white pigment positioned between said image-receiving layer and the next adjacent of said silver halide emulsion layers with its associated image dye-providing compound.

Claim 13

A photographic product as defined in claim 11 which includes a timing layer coated over said acid-reacting layer.

Claim 14

A photographic product as defined in claim 2 wherein said silver halide developing agent is contained in said acid-reacting layer.

Claim 15

A photographic product as defined in claim 12 wherein said silver halide developing agent is contained in said acid-reacting layer.

Claim 16

In a photographic process for producing a multicolor image including the steps of exposing a film unit comprising a plurality of layers including a support at least two selectively sensitive silver halide emulsion layers on said support, each of said emulsion layers having associated therewith an image dye-providing compound capable of undergoing silver ion assisted cleavage in the presence of an imagewise distribution of silver ions and/or soluble silver complex to provide a color-providing moiety in an imagewise distribution corresponding to said distribution of silver ions and/or soluble silver complex; applying an aqueous alkaline processing composition to said film unit to provide an aqueous alkaline solution of a silver halide developing agent and a silver halide solvent thereby developing said silver halide emulsion layers; forming in undeveloped areas of each of said emulsions layers an imagewise distribution of silver ions and/or soluble silver complex; contacting said imagewise distribution of silver ions and/or soluble silver complex formed in each of said emulsion layers with said emulsion layers associated image dye-providing compound thereby forming corresponding imagewise distributions of each of said color-providing moieties to form a dye image; and maintaining said layers intact subsequent to processing: the improvement which comprises providing a silver halide developing agent to reduce said silver ions and/or soluble silver complex at a predetermined time after but not prior to substantially complete formation of said dye image, said silver halide developing agent being included in one of the aforesaid layers or in a separate layer and being so positioned and/or so constituted that it is made available at said predetermined time.

Claim 17

In a photographic process for producing a multicolor image including the steps of exposing a film unit comprising a plurality of layers including a support at least two selectively sensitive silver halide emulsion layers on said support, each of said emulsion layers having associated therewith an image dye-providing compound capable of undergoing silver ion assisted cleavage in the presence of an imagewise distribution of silver ions and/or soluble silver complex to provide a color-providing moiety in an imagewise distribution corresponding to said distribution of silver ions and/or soluble silver complex; applying an aqueous alkaline processing composition to said film unit to provide an aqueous alkaline solution of a silver halide developing agent and a silver halide solvent thereby developing said silver halide emulsion layers; forming in undeveloped areas of each of said emulsions layers an imagewise distribution of silver ions and/or soluble silver complex; contacting said imagewise distribution of silver ions and/or soluble silver complex formed in each of said emulsion layers with said emulsion layers associated image dye-providing compound thereby forming corresponding imagewise distributions of each of said color-providing moieties to form a dye image; and maintaining said layers intact subsequent to processing: the improvement which comprises providing a silver halide developing agent to reduce said silver ions and/or soluble silver complex at a predetermined time after but not prior to substantially complete formation of said dye image, said silver halide developing agent being included in one of the aforesaid layers or in a separate layer and being so positioned and/or so constituted that it is made available at said predetermined time.

Claim 18

A photographic process as defined in claim 15 wherein said film unit includes an acid-reacting layer.

Claim 19

A photographic process as defined in claim 16 wherein said selectively sensitized emulsion layers are a red-sensitive emulsion, a green-sensitive emulsion and a blue-sensitive emulsion, and said image dye-providing compounds associated with said silver halide emulsions are, respectively, a cyan image dye-providing compound, a magenta image dye-providing compound and a yellow image dye-providing compound.

Claim 20

A photographic process as defined in claim 17 wherein each said image dye-providing compounds is substantially non-diffusible and undergoes cleavage to release a diffusible color-providing moiety.

Claim 21

A photographic process as defined in claim 18 wherein said diffusible color-providing moiety is a diffusible dye and said photographic film unit includes a superposed image-receiving layer so positioned as to be capable of receiving by diffusion transfer an imagewise distribution of each said diffusible dye.

Claim 22

A photographic process as defined in claim 19 wherein said film unit includes means for providing a light-reflecting layer between said image-receiving layer and said silver halide emulsion layers to mask said emulsion layers after development thereof and to provide a white background for viewing a dye image in said image-receiving layer.

Claim 23

A photographic process as defined in claim 20 wherein said film unit includes a second support and additionally includes means for applying an aqueous alkaline processing composition.

Claim 24

A photographic process as defined in claim 21 wherein said silver halide emulsion layers and their associated image dye-providing compounds are carried on said support, said image-receiving layer is carried on said second support and said means for applying an aqueous alkaline processing composition is positioned to provide a substantially uniform layer of processing composition between the outermost layer carried on said support and the outermos,t layer carried on said second support.

Claim 25

A photographic process as defined in claim 22 wherein said means for providing a light-reflecting layer comprises a white pigment dispersed in said processing composition.

Claim 26

A photographic process as defined in claim 21 wherein said image-receiving layer is carried on said support and said silver halide emulsion layers and their associated image dye-providing compounds are disposed over said image-receiving layer, said acid-reacting layer is carried on said second support and said means for applying an aqueous alkaline processing composition is positioned to provide a substantially uniform layer of processing composition between the outermost layer carried on said support and the outermost layer carried on said second support.

Claim 27

A photographic process as defined in claim 24 wherein said means for providing a light-reflecting layer comprises a preformed layer of white pigment positioned between said image-receiving layer and the next adjacent of said silver halide emulsion layers with its associated image dye-providing compound.

Claim 28

A photographic process as defined in claim 25 wherein said film unit includes a timing layer coated over said acid-reacting layer.

Claim 29

A photographic process as defined in claim 15 which includes the step of reducing the pH subsequent to image formation.

Claim 30

A photographic process as defined in claim 15 wherein said capturing of said silver ions and/or soluble silver complex is effected at a pH below the pH at which said imagewise distributions of each said color-providing moieties are formed.

Claim 31

A photographic process as defined in claim 16 wherein said silver halide developing agent is contained in said acid-reacting layer.

Claim 32

A photographic process as defined in claim 26 wherein said silver halide developing agent is contained in said acid-reacting layer.