Eastman-kodak Company

John Texter

Jared B Mooberry

David T Southby

David S Bailey

Thomas R Welter

David A Czekai

Roland G Willis

Ronald H White

Ravi Sharma

Wayne A Bowman

Glenn T Pearce

William B Travis

Tienteh M Chen

William P Lynch

John L Pawlak

Arthur H Herz

Edward Schofield

Douglas E Corbin

Vincent J Flow

Henry W Altland

J Michael Buchanan

Timothy Glover

John F Sirianni

Robert H Nuttall

A photographic chrogenic and substantially dry dye-diffusion-transfer element is disclosed, wherein said element is activated by heat and comprises contacting dye-receiver and dye-donor layers and further comprises a layer which contains a thermal solvent according to formula (I)

Dye diffusion image separation systems with thermal solvents

An aqueous developable photographic element for forming neutral images comprising balanced cyan, magenta, and yellow heat-diffusible-dye-forming couplers in one or more image forming layers, and further comprising sensitized silver halide, a thermal solvent for nonaqueous, thermal dye-diffusion transfer, and hydrophilic binder, each independently in one or more image forming layers, an integral receiver layer for dye mordanting during nonaqueous, thermal dye-diffusion transfer, and one and only one dimensionally stable support, where said receiver layer is intermediate said support and image forming layers, and wherein said receiver layer and said support may be mechanically separated from said image forming layers by opposing forces is disclosed. Processes for forming a neutral photographic image using such elements and using elements that are similar, but lacking an integral receiving layer, are also disclosed.

Chromogenic black and white imaging for heat image separation

Process for buffering concentrated aqueous slurries

An aqueous-developable chromogenic photographic heat-transferable non-aqueous dye-diffusion-transfer photographic element is disclosed, wherein said element comprises radiation sensitive silver halide, a dye-providing compound that forms or releases a heat-transferable image dye upon reaction of said compound with the oxidation product of a primary amine developing agent, a hydrophilic binder, and a thermal solvent for facilitating non-aqueous diffusion transfer according to formula (I) ##STR1## wherein AH is a hydrogen bond donating group with an aqueous pK.sub.a value for proton loss of greater than 6;

Hydrogen bond donating/accepting thermal solvents for image separation

An aqueous developable chromogenic photographic element coated on a single dimensionally stable support wherein said element comprises in reactive association (1) an aqueous diffusible photographically useful organic compound or precursor to an aqueous diffusible photographically useful organic compound, (2) radiation sensitive silver halide, (3) a compound that forms or releases a dye, (4) hydrophilic binder, and (5) one or more contiguous overcoat layers devoid of silver halide wherein said one or more overcoat layers comprise hydrophilic binder at a level of at least 3 g/m.sup.2 is disclosed.

Diffusional flux control of soluble components in photographic elements

A method of accelerating black and white development comprising contacting a negative-type silver halide photographic element during processing with a developer prebath or a developer bath comprising an accelerator compound of the formula: ##STR1## is disclosed, wherein R.sub.1, R.sub.2, and R.sub.3 are substituents; said R.sub.1, R.sub.2, and R.sub.3 may further combine with each other to form a 5-, 6-, or 7-membered ring; and wherein said developer prebath and developer bath do not contain any iron(III) ion complex salt having bleaching activity. A bath selected from the group consisting of developer prebaths and developer baths for black and white development of a negative-type silver halide photographic element comprising an aqueous solution of accelerator compound of the formula: ##STR2## is also disclosed, wherein R.sub.1, R.sub.2, and R.sub.3 are substituents; said R.sub.1, R.sub.2, and R.sub.3 may further combine with each other to form a 5-, 6-, or 7-membered ring; with the proviso that said developer prebath and developer bath do not contain any iron(III) ion complex salt having bleaching activity or any nucleating agent capable of chemically fogging a negative-type silver halide emulsion; and said accelerator compound is present in an amount between 10.sup.-8 and 10.sup.-1 moles/L.

Triazolium thiolate baths for silver halide development acceleration

A process for buffering concentrated aqueous slurries comprising the steps of:

An aqueous solid particle dispersion of a thermal solvent, where said thermal solvent is a water-immiscible phenol derivative and has a melting point, T.sub.m, between 30.degree. C. and about 200.degree. C., wherein said dispersion contains a dispersing aid, and wherein the thermal solvent particles in said dispersion are essentially nanocrystalline is disclosed. Also disclosed is a process for forming a coating comprising the steps of:

Nanoparticulate thermal solvents

A process is provided for preparing microprecipitated dispersions of filter dyes by preparing a concentrated slurry in aqueous medium of a filter dye having ionizable acid sites on the dye molecule, adding sufficient aqueous hydroxide to dissolve the filter dye, acidifying the solution with a stoichiometric amount of acidic protons to reprotonate up to 100% of the total ionizable acid sites on the dye molecule and provide a microprecipitated dispersion of the filter dye that is insoluble in aqueous media at pH values less than 3 but soluble in aqueous media at pH greater than 10.

Microprecipitation process for dispersing photographic filter dyes

A process for dispersing a particulate solid substance in a continuos aqueous phase comprising the steps of:

Process for dispersing concentrated aqueous slurries

A process for forming a nanocrystalline dispersion of a photographically useful compound in a continuous phase comprising the steps of:

Annealing processes for nanocrystallization of amorphous dispersions

A method for storing nanoparticulate suspensions of photographically useful compounds is disclosed that comprises the steps of:

Resuspension optimization for photographic nanosuspensions

A method is disclosed for developing an image in a photographic element comprising a support, a silver halide emulsion containing an imagewise distribution of developable silver halide grains, and a blocked photographically useful compound comprising a photographically useful group and a blocking group capable of releasing the photographically useful group upon processing the photographic element in the presence of a peroxide, wherein the blocking group comprises an electrophilic group which is solely capable of undergoing a nucleophilic displacement reaction, the electrophilic group being bonded directly or through a releasable timing group to the photographically useful group, with the proviso that when the photographically useful group is a development inhibitor, the blocking group is bonded to the photographically useful group through at least one releasable timing group. The method comprises the step of contacting the photographic element with a processing solution comprising a peroxide.

Blocked photographically useful compounds for use with

An aqueous-developable photographic color diffusion transfer element comprising one and only one dimensionally stable support and one or more layers comprising radiation sensitive silver halide, thermal solvent for facilitating the thermal diffusion of dyes through a hydrophilic binder, a dye-releasing coupler, a dye-receiving layer intermediate said support and dye-releasing coupler containing layers, a stripping layer intermediate said dye-receiving layer and any layers containing silver halide or dye-releasing coupler, and hydrophilic binder, wherein said dye is heat diffusible in said binder and thermal solvent, wherein said dye-releasing coupler is of the structure

Heat image separation with phenolic thermal solvents and dye releasing

A photographic color diffusion transfer element is disclosed wherein said element comprises a single dimensionally stable support, wherein said support comprises an opaque and light reflecting layer, and coated thereon in reactive association and in sequence (1) a mordant layer for binding diffusible dyes, (2) a stripping layer, (3) one or more layers comprising radiation sensitive silver halide, a solid particle dispersion of a diffusible-dye forming compound, or radiation sensitive silver halide and a solid particle dispersion of a diffusible-dye forming compound, and (4) a barrier layer comprising a polymer that (a) allows the passage of solutions for processing said element when said element is contacted with an external processing bath and (b) blocks the diffusion out of said element of the diffusible dye formed from said solid particle dispersion of a diffusible-dye forming compound when said element is contacted with an external processing bath. A further embodiment of a photographic color diffusion transfer element is disclosed wherein said element comprises a single dimensionally stable transparent support, and coated thereon in reactive association and in sequence (1) a mordant layer for binding diffusible dyes, (2) an opacifying light reflecting layer, (3) one or more layers comprising radiation sensitive silver halide, a solid particle dispersion of a diffusible-dye forming compound, or radiation sensitive silver halide and a solid particle dispersion of a diffusible-dye forming compound, and (4) a barrier layer comprising a polymer that (a) allows the passage of solutions for processing said element when said element is contacted with an external processing bath and (b) blocks the diffusion out of said element of the diffusible dye formed from said solid particle dispersion of a diffusible-dye forming compound when said element is contacted with an external processing bath. In addition, another embodiment of a photographic color diffusion transfer element is disclosed wherein said element comprises a single dimensionally stable transparent support, and coated thereon in reactive association and in sequence (1) one or more layers comprising radiation sensitive silver halide, a solid particle dispersion of a diffusible-dye forming compound, or radiation sensitive silver halide and a solid particle dispersion of a diffusible-dye forming compound, (2) an pacifying light reflecting layer, (3) a mordant layer for binding diffusible dyes, and (4) a barrier layer comprising a polymer that (a) allows the passage of solutions for processing said element when said element is contacted with an external processing bath and (b) blocks the diffusion out of said element of the diffusible dye formed from said solid particle dispersion of a diffusible-dye forming compound when said element is contacted with an external processing bath.

Growing community of inventors

Rochester, NY, United States of America

John Texter