摘要:
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.
摘要:
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:providing an aqueous solid particle dispersion of 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., and where said dispersion contains a dispersing aid; combining said aqueous solid particle thermal solvent dispersion with a coating melt composition, where said coating melt composition is maintained at a temperature, T.sub.c, during the preparation and coating of said coating melt composition, and where T.sub.c
摘要:
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.
摘要:
A diffusion transfer process is disclosed for forming a color photographic image comprising the steps of:providing an aqueous-developable photographic color diffusion transfer element of two or more layers comprising a single dimensionally stable support, radiation sensitive silver halide, an aqueous solid particle thermal solvent dispersion for facilitating the thermal diffusion of dyes through a hydrophilic binder, a dye-releasing or dye-forming coupler compound, and hydrophilic binder, wherein said dye is heat transferable in said binder and said thermal solvent, said thermal solvent has a melting point between 50.degree. C. and about 200.degree. C., said dispersion contains a dispersing aid, and said thermal solvent is incorporated at 5 to 200% by weight of said hydrophilic binder;exposing said element to actinic radiation;processing said element by contacting said element to an external aqueous bath containing compounds selected from the group consisting of conventional color developer compounds of the primary amine type, compounds which activate the release of incorporated color developers, and compounds which activate development by incorporated dye developers;washing said element;drying said clement to remove imbibed water; andheating said element to effect dye diffusion transfer to an image receiving layer, wherein bleaching and fixing steps are absent in said diffusion transfer process.
摘要:
In accordance with this invention a heat-developable photographic color diffusion transfer element is provided, where this element comprises a dimensionally stable support and one or more layers comprising radiation sensitive silver halide, an organic silver salt oxidizing agent, a reducing agent, a methine-dye releasing compound, and a binder, wherein said methine-dye is heat diffusible in said element, and wherein said methine-dye releasing compound is of the structureCp--L--M (I)whereCp is a coupler radical substituted in the coupling position with a divalent linking group, L;M is a methine-dye radical exhibiting selective absorption in the visible spectrum; and where the --L--M group couples off upon reaction of said coupler radical with the oxidation product of a primary amine developing agent, and where said methine-dye radical M is released from said --L--M group subsequent to the coupling off of said --L--M group.
摘要:
A method of forming chromogenic photographic image comprising the steps of:providing an aqueous developable photographic element coated on a single dimensionally stable support, wherein said element comprises in reactive association (1) a developing agent, where said developing agent is a primary amine or a precursor of a primary amine, (2) radiation sensitive silver halide, (3) a color coupler compound that forms or releases a dye upon reaction with the oxidation product of a primary amine developing agent, and (4) a hydrophilic binder;exposing said element to actinic radiation; anddeveloping said image by contacting said element with an applied volume of an aqueous processing solution, wherein said applied volume is limited to less than 800% of the swell volume of said element in equilibrium-mechanical contact with said processing solution or the temporal duration of said contacting is limited to a time less than 500% of the time necessary for said element to swell to 90% of said swell volume.
摘要:
A photographic coupler dispersion comprising colloidal microcrystalline particles of coupler, wherein said particles are wetted with an activating and water-immiscible organic solvent, and a color photographic element comprising a support bearing at least one photographic silver halide emulsion layer and a microcrystalline coupler dispersion in reactive association with said emulsion layer, wherein said coupler is wetted with an activating water-immiscible organic solvent are disclosed.
摘要:
A process is disclosed for forming a dye image including the steps of:exposing a photographic element comprising a support bearing a light sensitive silver halide emulsion layer containing a polymeric color coupler compound capable of forming a heat transferable dye upon development, wherein the polymeric color coupler compound is of the formula:COUP-L-B wherein COUP represents a coupler moiety capable of forming a heat transferable dye upon reaction of the moiety with an oxidation product of a color developer; L is a divalent linking group which is separated from COUP upon reaction of the coupler moiety with said oxidation product of a color developer; and B represents the polymeric backbone;developing said exposed element with a color developer solution to form a heat transferable dye image;heating said exposed, developed element to thereby transfer the dye image from the emulsion layer to a dye receiving layer, where said receiving layer is part of the photographic element or part of a separate dye receiving element brought into contact with the photographic element; andseparating the emulsion layer from the dye receiving layer containing the transferred dye image.
摘要:
A microprecipitated dispersion comprising a methine oxonol filter dye is provided which has the formula ##STR1## wherein n is 0, 1, or 2; R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are the same or different substituted or unsubstituted alkyl or aryl groups, one or more of R.sub.1, R.sub.2, R.sub.3, and R.sub.4 contains carboxy substituent --CO.sub.2 Z, wherein Z.sup.+ is a statistical mixture of hydrogen (H.sup.+) and alkali or tetraalkylammonium cations (M.sup.+) such that Z.sup.+ =xH.sup.+ +(1-x)M.sup.+, where x is a decimal ranging from about 0.33 to about 0.95, and photographic elements containing them.
摘要:
The polymerization and copolymerization of photographically useful vinyl monomers can be effected by dissolving such monomers in an isotropic oil-in-water microemulsion or in an isotropic water-in-oil microemulsion, each comprising monomers or comonomers, surfactants and/or cosurfactants, water, and optionally electrolytes. The microemulsion may be characterized as transparent or nearly transparent to the eye at 1% (w/w) or greater monomer, ultrafine in particle (droplet) size (typically in the range of 30 to 900 .ANG. in diameter), and spontaneously formed upon combining all the components with moderate stirring. The polymerization process is subsequently initiated with free radical initiators or with ultraviolet light. The components are chosen so that photographically useful polymers or photographically useful latexes are obtained, and said polymers or latexes may be coated in a photographic element.