Additive diffusion transfer color photographic processes and film units for use therewith

Claim 2

A photographic film unit as defined in claim 2 wherein said silver-precipitating nuclei are present in a concentration effective to provide a silver image derived from unexposed silver halide crystals possessing greater covering power than a silver image derived from exposed silver halide crystals.

Claim 3

A photographic film unit as defined in claim 3 wherein said silver image derived from unexposed silver halide crystals comprises silver of a first physical character and said silver image derived from exposed silver halide crystals coMprises silver of a second physical character, said first physical character silver possessing higher optical density than said second physical character silver per unit mass.

Claim 4

A photographic film unit as defined in claim 4 which comprises a permanent fixed laminated including a transparent support carrying on one surface, in order, a color screen, a layer comprising silver-precipitating nuclei, a photosensitive silver halide emulsion layer comprising, dispersed in a processing composition permeable polymeric binder, photosensitive silver halide crystals, and a layer comprising silver-precipitating nuclei, said silver-precipitating nuclei present in a concentration effective to provide upon development in the presence of a silver halide solvent, as a function of exposure, a silver image comprising said first and said second physical character silver.

Claim 5

A photographic film unit as defined in claim 3 which is a permanently fixed laminate and comprises a transparent support carrying on one surface, in order, a color screen, a substantially photoinsensitive layer comprising silver-precipitating nuclei, a photosensitive silver halide emulsion layer comprising photosensitive silver halide crystals and a substantially photoinsensitive layer comprising silver-precipitating nuclei, said silver- precipitating nuclei present in a concentration effective to provide upon development in the presence of a silver halide solvent, as a function of exposure, a silver image derived from development of exposed silver halide crystals possessing a maximum image density at least 1.0 density units less than the maximum density of a silver image derived from development of unexposed silver halide crystals.

Claim 6

A photographic film unit as defined in claim 6 which is a permanently fixed laminate and comprises a transparent flexible polymeric support carrying on one surface, in order, a multicolor screen, a substantially photoinsensitive layer comprising silver-precipitating nuclei dispersed in a processing composition permeable binder, a photosensitive silver halide emulsion comprising photosensitive silver halide crystals dispersed in a processing composition permeable binder, and a substantially photoinsensitive layer comprising silver-precipitating nuclei dispersed in a processing composition permeable binder, said processing composition permeable binders effective to substantially prevent microscopic distortion of image components in registration with individual color screen optical filter elements through which the photosensitive emulsion was exposed, said silver-precipitating nuclei present in a concentration effective to provide upon development in the presence of a silver halide solvent, as a function of exposure of the unit to actinic radiation, a minimum image density not in excess of about 0.5 and a maximum image density of not less than about 1.5.

Claim 7

A photographic film unit as defined in claim 5 wherein said permeable polymeric binder comprises gelatin.

Claim 8

A photographic film unit as defined in claim 8 wherein said gelatin binder contains dispersed therein silica.

Claim 9

A photographic film unit as defined in claim 9 wherein said silica is present in a concentration of about 0.3 to 1.5 parts silica per part gelatin.

Claim 10

A photographic film unit as defined in claim 7 wherein said permeable binder of at least one of said photoinsensitive layers comprises deacetylated chitin.

Claim 11

A photographic film unit as defined in claim 1 including a separate processing composition permeable polymeric layer containing a silver halide-developing agent positioned intermediate said color screen and said photosensitive silver halide emulsion.

Claim 12

A photographic film unit as defined in claim 1 wherein said color screen comprises an additive color screen.

Claim 13

A photographic film unit as defined in claim 1 wherein said silver-precipitating nuclei are present in a concentration of about 1-25 X 106 moles/ft.2.

Claim 14

A photoGraphic film unit as defined in claim 1 wherein said silver-precipitating nuclei comprises metallic sulfides, metallic selenides or colloidal noble metals.

Claim 15

A photographic film unit as defined in claim 1 wherein said silver halide crystals comprise silver iodobromide crystals.

Claim 16

A photographic film unit as defined in claim 16 wherein said silver iodobromide crystals comprise about 1 to 9 percent by weight, iodide.

Claim 17

A photographic film unit as defined in claim 1 wherein said photosensitive silver halide crystals are panchromatically sensitized.

Claim 18

A photographic film unit as defined in claim 18 wherein said color screen is a tricolor additive screen.

Claim 19

A photographic film unit as defined in claim 19 wherein said additive tricolor screen comprises red, green and blue colored optical filter elements.

Claim 20

A photographic film unit as defined in claim 20 which is a permanent fixed laminate and comprises a transparent flexible polymeric support carrying on one surface, in order, a plurality of layers including a trichromatic additive color screen comprising red, green and blue color optical filter elements; a substantially photoinsensitive layer comprising silver precipitating nuclei dispersed in a processing composition permeable polymeric binder; a photosensitive silver halide emulsion comprising panchromatically sensitized silver iodobromide crystals dispersed in a gelatin binder; a substantially photoinsensitive layer comprising silver-precipitating nuclei dispersed in a processing composition permeable polymeric binder; said silver-precipitating nuclei comprising metallic sulfide, metallic selenide or colloidal noble metal silver-precipitating nuclei present in a concentration effective to provide upon development of exposed silver iodobromide crystals in the presence of a silver halide solvent, as a function of the point-to-point degree of exposure to actinic radiation, a maximum silver image density not in excess of about 0.3 and a maximum silver image density of developed silver derived from unexposed silver halide crystals of not less than about 1.8.

Claim 21

A photographic process which comprises, in combination, the steps of exposing a photographic film unit comprising a permanent laminate which contains a color screen, in order, a first layer comprising silver precipitating nuclei; a layer comprising a photosensitive silver halide; and a second layer comprising silver-precipitating nuclei, through said color screen, contacting said exposed silver halide layer with an aqueous processing composition containing a silver halide-devleoping agent and a silver halide solvent thereby providing a visible silver image to said film unit in terms of the unexposed areas of said silver halide layer as the function of the point-to-point degree of exposure thereof, and maintaining said laminate intact subsequent to processing.

Claim 22

A photographic process as defined in claim 22 which comprises, in combination, the steps of exposing a photographic film unit which comprises a permanent fixed laminate including a transparent support carrying on one surface, in order, a color screen, a layer comprising silver-precipitating nuclei, a photosensitive silver halide emulsion comprising photosensitive silver halide crystals dispersed in a processing composition permeable polymeric binder, and a layer comprising silver precipitating nuclei, said silver-precipitating nuclei present in a concentration effective to provide a silver image possessing optical density inversely proportional to exposure of the emulsion, through said screen, contacting said silver halide emulsion with an aqueous processing composition containing a silver halide-developing agent and a silver halide solvent to provide a visible silver image to said emulsion possessing optical density inversely proportional to exposure of the emulsion, and maintaining said laminate intact subsequent to processing.

Claim 23

A photographic process as defined in claim 23 which comprises in combiNation, the steps of exposing a photographic film unit comprising a permanent laminate containing a transparent support carrying on one surface, in order, a color screen, a first substantially photoinsensitive layer comprising silver-precipitating nuclei, a photosensitive silver halide emulsion comprising photosensitive silver halide crystals dispersed in a processing composition permeable polymeric binder, and a second substantially photoinsensitive layer comprising silver-precipitating nuclei, said silver-precipitating nuclei present in a concentration effective to provide a silver image derived from unexposed silver halide crystals possessing greater covering power than a silver image derived from exposed silver halide crystals, through said screen, contacting said silver halide emulsion with an aqueous processing composition containing a silver halide-developing agent and a silver halide solvent for a period of time effective to provide a visible silver image to said film unit, as a function of emulsion exposure, derived from unexposed silver halide crystals possessing greater covering power than the silver image derived from exposed silver halide crystals, and maintaining said laminate intact subsequent to processing.

Claim 24

A photographic process as defined in claim 24 wherein said silver image derived from unexposed silver halide crystals comprises silver of a first physical character and said silver image derived from exposed silver halide crystals comprises silver of a second physical character, said first physical character silver possessing higher optical density than said second physical character silver per unit mass.

Claim 25

A photographic process as defined in claim 24 which comprises, in combination, the steps of exposing a photographic film unit which comprises a permanent fixed laminate containing a transparent support carrying on one surface, in order, a multicolor screen, a first substantially photoinsensitive layer comprising silver-preciptating nuclei dispersed in a processing composition permeable matrix, a photosensitive silver halide emulsion comprising photosensitive silver halide crystals dispersed in a processing composition permeable polymeric binder, and a second substantially photoinsensitive layer comprising silver-precipitating nuclei dispersed in a processing composition permeable matrix, said silver-precipitating nuclei present in a concentration effective to provide upon development, as a function of exposure, a silver image derived from development of unexposed silver halide crystals possessing a maximum image density at least 1.0 density units greater than the maximum density of the silver image derived from development of exposed silver halide crystals, said exposure resultant from actinic radiation incident on said transparent support, contacting said silver halide emulsion with an aqueous processing composition containing a silver halide-developing agent and a silver halide solvent for a period of time effective to provide a visible silver image to said film unit in terms of the unexposed areas of said emulsion as a function of the point-to-point degree of emulsion exposure, said visible silver image derived from development of unexposed silver halide crystals and possessing a maximum image density at least 1.0 density units greater than the maximum density of developed silver derived from development of exposed silver halide crystals, and maintaining said laminate intact subsequent to said processing.

Claim 26

A photographic process as defined in claim 26 which comprises, in combination, the steps of exposing a photographic film unit which is a permanently fixed laminate and comprises a transparent support carrying on one surface, in order, a multicolor screen, a first substantially photoinsensitive layer comprising silver-precipitating nuclei dispersed in a processing composition permeable polymeric binder, a photosensitive silver halide emulsion comprising photosensitive silver halide crystals dispersed in a processing compositioN permeable polymeric binder, and a second substantially photoinsensitive layer comprising silver precipitating nuclei dispersed in a processing composition permeable polymeric binder, said silver-precipitating nuclei present in a concentration effective to provide upon development of exposed silver halide crystals a maximum silver image density not in excess of about 0.5 and a maximum silver image density derived from unexposed silver halide crystals upon processing of not less than about 1.5, said exposure accomplished by actinic radiation incident on said transparent support, contacting said silver halide emulsion with an aqueous-processing composition containing a silver halide-developing agent and a silver halide solvent for a sufficient time to provide a silver image to said film unit comprising a maximum density of image silver derived from development of unexposed silver halide crystals of not less than about 1.5 and a maximum density of image silver derived from development of exposed silver halide crystals not in excess of about 0.5, and maintaining said laminate intact subsequent to processing.

Claim 27

A photographic process as defined in claim 22 wherein said color screen comprises an additive color screen.

Claim 28

A photographic process as defined in claim 28 wherein said additive color screen comprises a trichromatic additive color screen comprising red, green and blue chromatic filter elements.

Claim 29

A photographic process as defined in claim 22 wherein said silver halide emulsion comprises a silver iodobromide emulsion.

Claim 30

A photographic process as defined in claim 30 wherein said silver iodobromide emulsion is panchromatically sensitized.

Claim 31

A photographic process as defined in claim 31 wherein said silver iodobromide emulsion comprises silver iodobromide crystals containing about 1 to 9 percent, by weight, iodide.

Claim 32

A photographic process as defined in claim 22 wherein said silver halide developing agent is disposed in said film unit prior to said contact of said unit with said aqueous processing composition.

Claim 33

A photographic process as defined in claim 24 wherein said processing composition permeable polymeric binder comprises gelatin.

Claim 34

A photographic process as defined in claim 34 which comprises, in combination, the steps of exposing a photographic film unit which comprises a permanent laminate containing a transparent support carrying on one surface, in order, a trichromatic additive color screen, comprising red, green and blue optical filter elements, a first substantially photoinsensitive layer comprising silver-precipitating nuclei dispersed in a processing composition permeable polymeric binder, a photosensitive silver halide emulsion comprising panchromatically sensitized silver iodobromide crystals dispersed in a processing composition permeable gelatin binder, and a second substantially photoinsensitive layer comprising silver-precipitating nuclei dispersed in a processing composition permeable polymeric binder, said binders possessing a lattice effective to substantially prevent microscopic diffusion of image silver components, said silver-precipitating nuclei present in a concentration effective to provide, upon development in the presence of a silver halide solvent and as a function of exposure, image silver derived from development of exposed silver iodobromide crystals possessing a maximum silver image density less than about 0.3 and a maximum silver image density derived from unexposed silver iodobromide crystals greater than about 1.8, said exposure accomplished by actinic radiation incident on said transparent support; contacting said exposed emulsion with an aqueous processing composition containing a silver halide-developing agent and a silver halide solvent for a time sufficient to provide a silver image to said film unit in terms of the unexposed areas of said emulsion possessing a maximum silver image density of not less than about 1.8 and a silver image of said emUlsion in terms of the exposed areas of said emulsion possessing a maximum silver image density not in excess of about 0.3; and maintaining said laminate intact subsequent to processing.

Claim 35

A photographic process as defined in claim 35 wherein said silver-precipitating nuclei comprises metallic sulfides, metallic selenides or colloidal noble metals.

Claim 36

A photographic process as defined in claim 36 wherein said silver precipitating nuclei are dispersed in said silver iodobromide emulsion in a concentration of about 1 to 25 X 106 moles/ft.2. 38 A photographic process as defined in claim 34 wherein said panchromatically sensitized emulsion additionally contains silica dispersed therein.

Claim 37

A photographic product which comprises a permanent composite film unit including a color screen having associated therewith, in order, a first layer comprising silver-precipitating nuclei; a developed, photoexposed silver halide layer and a second layer comprising silver-precipitating nuclei, said film unit containing a silver image possessing optical density inversely proportional to photoexposure of said stratum.

Claim 38

A photographic product as defined in claim 39 wherein said silver image includes a positive silver image in terms of unexposed areas of said film unit comprising silver of a first physical character and a negative silver image in terms of exposed areas of said film unit comprising silver of a second physical character, said first physical character silver possessing higher optical density per unit than said second physical character silver.

Claim 39

A photographic product as defined in claim 40 wherein said positive silver image possesses maximum density in unexposed areas of said film unit at least 1.5 density units greater than the maximum density of said negative silver image in exposed areas of said silver halide layer.

Claim 40

A photographic product as defined in claim 41 wherein said negative silver image possesses a maximum density in exposed areas of said silver halide stratum not in excess of about 0.5 and a maximum density of said positive silver image in unexposed areas of said film unit not less than about 2.0.

Claim 41

A photographic product as defined in claim 39 wherein said color screen is an additive color screen.

Claim 42

A photographic product as defined in claim 43 wherein said additive color screen is carried on a flexible transparent support and comprises a trichromatic color screen comprising red, green and blue colored optical filter elements.