Abstract: A thermal recording element comprising a support having thereon a recording layer comprising a J-aggregate derived from an oxonol dye dispersed in a hydrophilic binder.

Abstract: A silver halide color photosensitive material comprises a support provided thereon with a photosensitive silver halide, a developing agent, a coupler, and a binder. After exposure, the photosensitive material is placed, onto a processing material comprising a support provided with a processing layer thereon which contains a base and/or a precursor of a base, with water being present between the photosensitive material and the processing material in an amount of 1/10through 1 times that required to maximally swell the layers of the materials. The resultant assembly is heated to form an image on the photosensitive material. The photosensitive material includes an emulsion in which tabular silver halide grains having an aspect ratio of 2 to 30 account for 50% to 100% of the total projected area of all silver halide grains and in which 50% to 100% of all silver halide grains in number include 10 or more dislocation lines per grain. A method of forming images using this photosensitive material is also disclosed.

Abstract: A silver halide color photographic light-sensitive material is disclosed, capable of forming an image by, after exposure of a light-sensitive material, supplying water corresponding to from 1/10 to 1 times the water necessary for giving maximum swelling of all coated layers of a light-sensitive material and a processing material to the light-sensitive material or the processing material, laminating these materials to each other and then heating them, the light-sensitive material comprising a support having thereon at least one photographic light-sensitive layer comprising a light-sensitive silver halide, a developing agent, a compound capable of forming a dye upon coupling reaction with an oxidation product of the developing agent and a binder, and the processing material comprising a support having thereon a processing layer containing a base and/or a base precursor, wherein at least two kinds of silver halide emulsions having spectral sensitivity in the same wavelength region and different in the average gr

Abstract: The present invention discloses a heat developable silver halide color photographic light-sensitive material comprising a support having thereon photographic constituent layers which comprise at least one photographic light-sensitive layer comprising a light-sensitive silver halide emulsion, a developing agent, a compound capable of forming a dye by a coupling reaction with the oxidation product of the developing agent, and a binder, wherein at least one photographic constituent layer contains at least one of the compounds expressed by the formula (I), (II), (III), or (IV) below, and wherein at least 50% of the total projected area of silver halide grains contained in the light-sensitive silver halide emulsion is taken up by tabular silver halide grains at least 50% of which are composed of silver chloride.

Abstract: The present invention relates to a silver halide color photographic light-sensitive material which has on a substrate at least one photographic light-sensitive layer comprising a light-sensitive silver halide emulsion containing epitaxial silver halide grains having at least one kind of silver salt epitaxy formed on the surface of silver halide tabular grains acting as a host, a developing agent, a compound capable of forming a dye by a coupling reaction with the oxidation product of said developing agent, and a binder. The present invention provides a silver halide color photographic light-sensitive material which few adverse effects on the environment, and which is well suited for the simple and rapid process, and which provides graininess of good and high-sensitivity, and which is especially excellent in storage life.

Abstract: Compositions for making structured color images comprising (a) a soluble pigment precursor which can be transformed to an insoluble pigment by means of chemical, thermal, photolytic or radiation-induced method, and (b) a binder polymer or prepolymer, or a positive or negative resist-type resin which can be structured by crosslinking, polymerization or depolymerization by applying heat or electromagnetic irradiation. The compositions can be applied to optical and thermal recording, printing, and the production of color filters for Liquid Crystal Displays, with high accuracy, high transparency and high stability.

Abstract: There is disclosed novel color-developing agents of the formula (I). There is also disclosed silver halide photographic light-sensitive materials and image-forming methods, using the color-developing agent. The color-developing agent is excellent in color-forming property, and the image obtained from the color-developing agent is good in stability of hue and image. ##STR1## wherein Z.sup.1 represents an acyl group, a carbamoyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, a sulfonyl group, or a carbonimidoyl group, Q.sup.1 represents a group of atoms required to form a 5- or 6-membered aromatic ring together with the C, Q.sup.2 represents a heterocyclic residue, Y.sup.1 represents a group capable of substitution onto the aromatic ring, m is 1 or 2, and n is an integer of 0 to 3.

Abstract: A color image formation method excellent in discrimination and color image stability after processing which comprises overlaying a heat developable color light-sensitive material with a complexing agent sheet in the presence of a small amount of water therebetween after or during imagewise exposure, said light-sensitive material comprising a support having provided thereon at least a light-sensitive silver halide, a binder, a coupler, a reducing agent and a slightly-water-soluble basic metal compound, said sheet comprising a support having provided thereon at least a compound forming a complex with a metal ion constituting said basic metal compound; and heat developing the light-sensitive material to obtain a color image thereon, wherein the silver chloride content of said silver halide is 80 mol % or more, said complexing agent sheet comprises a physical development nucleus and a solvent for a silver halide, and said reducing agent is at least one compound of specified phenols, hydrazines and hydrazones.

Abstract: A color-photographic recording material is described which contains a magenta coupler and, as stabilizer, at least one compound of the formula ##STR1## where the radicals are as defined in the specification.

Abstract: Methods of forming color images having excellent graininess and sharpness by simple heat development processing are disclosed.

Abstract: If a color photographic material, which is processed by the process steps a) image-by-image exposure, b) color developing, c) bleaching, d) fixing, e) washing or stabilizing, and f) drying, wherein steps c) and d) may be combined to constitute bleach-fixing, is subjected to a temperature treatment of 0.01 to 30 seconds at 60 to 240.degree. C. between exposure and color developing, an increase of the contrast can thereby be obtained.

Abstract: An image formation method comprising imagewise exposing a silver halide light-sensitive material comprising a support having thereon a light-sensitive silver halide, a binder, a slightly water soluble basic metal compound, and a dye composition which is decolorized or discolored on heat development; contacting the surface of the light-sensitive material with a sheet coated with a binder and a compound which forms a complex with a metal ion constituting the basic metal compound and heating them in the presence of a reducing agent and water after or during the imagewise exposing; and peeling off the sheet to obtain an image on at least the light-sensitive material and the sheet, wherein the dye composition comprises an oil-soluble dye formed by a leuco dye and a color developer.

Abstract: Provided is a silver halide photographic material excellent in discrimination, which comprises on a support at least one compound represented by formula (1): ##STR1## wherein R.sub.1 to R.sub.4 each represents a hydrogen atom or a substituent, with the proviso that the sum of the Hammett substituent constants .sigma..sub.p values of R.sub.1 to R.sub.4 is 0 or more; and R.sub.5 to R.sub.9 each represents a hydrogen atom or a substituent and at least one of R.sub.5 and R.sub.9 is a substituent, wherein R.sub.1 and R.sub.2, R.sub.5 and R.sub.6, R.sub.6 and R.sub.7, R.sub.7 and R.sub.8, or R.sub.8 and R.sub.9 may combine with each other to form a ring.

Abstract: There is disclosed a silver halide photosensitive material and a method for forming an image, by the use of a color-developing agent of the type of carbonylhydrazone. The color-developing agent has satisfactory storage stability and capability for forming an image.

Abstract: There is disclosed a light-sensitive material comprising, in a hydrophilic colloid provided on a base, a color-developing agent represented by formula (I): ##STR1## wherein R.sup.1 represents an alkyl group, an alkenyl group, an alkynyl group, an aryl group, or a heterocyclic group; X.sup.1, X.sup.3, and X.sup.5 each represent a hydrogen atom, a nitro group, a cyano group, an alkylsulfonyl group, an arylsulfonyl group, an alkylsulfinyl group, an arylsulfinyl group, a sulfamoyl group, a carbamoyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an acyl group, a trifluoromethyl group, or a heterocyclic group; and X.sup.2 and X.sup.

Abstract: Pyridone dyes useful for thermal transfer have the formula ##STR1## where R.sup.1 is hydrogen or C.sub.1 -C.sub.4 - alkyl,R.sup.2 and R.sup.3 are identical or different and each is, independently of the other, hydrogen, substituted or unsubstituted C.sub.1 -C.sub.12 -alkyl, C.sub.5 -C.sub.7 -cycloalkyl, substituted or unsubstituted phenyl, substituted or unsubstituted pyridyl, substituted or unsubstituted C.sub.1 -C.sub.12 -alkanoyl, C.sub.1 -C.sub.12 -alkoxycarbonyl, substituted or unsubstituted C.sub.1 -C.sub.12 -alkylsulfonyl, C.sub.5 -C.sub.7 -cycloalkylsulfonyl, substituted or unsubstituted phenylsulfonyl, substituted or unsubstituted pyridylsulfonyl, substituted or unsubstituted benzoyl, pyridylcarbonyl or thienylcarbonyl or are together with the nitrogen atom to which they are bonded unsubstituted or C.sub.1 -C.sub.4 - alkyl-substituted succinimido, unsubstituted or C.sub.1 -C.sub.

Abstract: A photothermographic element comprising a support bearing at least one heat-developable, photosensitive, image-forming photothermographic emulsion layer comprising:(a) a photosensitive silver halide;(b) a non-photosensitive, reducible source of silver;(c) a reducing agent for the non-photosensitive reducible silver source; and(d) a binder;wherein the reducing agent is a hydrazide redox-dye-releasing compound of the general formulae: ##STR1## wherein: D represents the chromophore of a thermally mobile dye; X represents a single bond or a divalent linking group; R.sup.1 and R.sup.2 independently represent an organic group; and n.gtoreq.1.

Abstract: 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;L.sup.1 and L.sup.

Abstract: Photothermographic elements capable of producing a high density yellow or magenta image upon image-wise exposure and thermal development at a relatively low temperature and for a short period of time are described. The photothermographic elements of the invention comprise coated on a support base at least one light-sensitive emulsion layer comprising (a) a leuco dye reducing reducing agent, (b) a photosensitive silver halide, (c) an organic silver compound capable of being reduced by the leuco dye reducing agent, and (d) a binder; wherein the leuco dye reducing agent thereto comprises a chromogenic yellow or magenta leuco dye compound.The photothermographic elements of the invention may be used to obtain yellow and magenta images of suitable density in single color or multicolor photothermographic articles. At the same time the chromogenic leuco dye is stable enough not to be oxidized by oxygen of the air or by simple heating and to limit the fog formation after development.

Abstract: A recording material which comprises a support having provided thereon capsules containing a photosensitive diazonium salt, and a polymerizable coupler. The recording material can give a predetermined hue when light, pressure, heat and the like are applied alone or in combination. The main advantages of the recording material are that a specific hue can be selected safely, mixing of colors can be avoided, desensitization problem does not occur and a fixed image can be obtained.

Abstract: Heat-developable photothermographic materials capable of providing stable color images of high resolution. These materials comprise a support bearing a layer of an image-forming composition comprising:(a) a photosensitive silver halide,(b) an organic silver compound,(c) a reducing agent for silver ion, and(d) a binder,The reducing agent comprises a ballasted leuco dye compound. The ballasted leuco dye compound comprises a compound of the general formula:D--BwhereinD represents the reduced chromophore of a thermally mobile dye; andB represents an organic group that reduces the thermal mobility of D in the aforementioned binder, said organic group B capable of being oxidatively cleaved. The molecular weight of B must not be so high that the resulting amount of D in the emulsion layer is insufficient to yield a dye image having a reflection optical density of at least 0.3 or a transmission optical density of at least 0.2.

Abstract: A heat-sensitive recording material for laser recording is provided including a support having thereon a heat-sensitive layer including at least a first substantially colorless coloring component, a second substantially colorless coloring component which reacts with the first substantially colorless coloring component to develop a color, and an infrared-absorbing dye.

Abstract: A thermal-dye-bleach construction comprising a dye in association with a thermal dye-bleaching agent of general formula I: ##STR1## wherein: each of R.sup.a and R.sup.b are individually selected from: hydrogen, an alkyl group, an alkenyl group, a cycloalkyl group, an aralkyl group, an aryl group, and a heterocyclic group, and preferably, both R.sup.a and R.sup.b represent hydrogen;p is one or two, and when p is one, Z is a monovalent group selected from: an akyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an aryl group, and a heterocyclic group, and when p is two, Z is a divalent group selected from: an alkylene group, an arylene group, an alkenylene group, an alkynylene group, an aralkylene group, a cycloalkene group, and a heterocyclic group; and,M.sup.+ is a cation which will not react with a carbanion generated from the thermal-carbanion-generating agent in such manner as to render the carbanion ineffective as a bleaching agent for the dye.

Abstract: An X-Ray sensitive composition including one or several photopolymerizable monomer or photocrosslinkable polymer systems and thermochromic substances which can be used in a dry X-Ray reproduction process. The process is based on the different dielectric constants and dielectric losses exhibited by a monomer and the corresponding polymer or a polymer and the crosslinked polymer and the reaction of certain thermochromic substances which exhibits a specific threshold temperature above which these substances change from a colorless form to a color stable form. The X-Ray sensitive element is exposed according to a pattern of X-Ray with spatial modulation providing an X-Ray image to form a latent image of polymerized or crosslinked zones and unpolymerized or non crosslinked zones.

Abstract: 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-Bwherein 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 receivin

Abstract: A process is disclosed for forming an improved dye image in an aqueous-developable photographic dry dye-diffusion transfer element comprising the steps of:providing an aqueous-developable chromogenie photographic dry dye-diffusion transfer element comprising radiation sensitive silver halide, an aqueous-developable material containing color coupler wherein said coupler forms or releases a heat-transferable dye upon reaction of said coupler with the oxidation product of a primary amine developing agent, a hydrophilic binder, and a thermal solvent wherein said thermal solvent has the structure I ##STR1## wherein (a) Z.sub.1, Z.sub.2, Z.sub.3, Z.sub.4, and Z.sub.5 are substituents, the Hammer sigma parameters of Z.sub.2, Z.sub.3, and Z.sub.4 sum to give a total, .SIGMA., of at least -0.28 and less than 1.

Abstract: Phothermographic material capable of producing a high density cyan image upon image-wise exposure and thermal development at a relatively low temperature and for a short period of time. The photothermographic material of the invention comprise coated on a support base at least one light-sensitive emulsion layer containing: (a) a binder; (b) a silver source material; (c) a light sensitive silver halide in catalytic proximity to said silver source material, wherein said emulsion layer or an adjacent layer thereto comprises a chromogenic cyan leuco dye.The photothermographic material of the invention may be used to obtain good cyan image of suitable density in single color or multicolor photothermographic articles. At the same time the chromogenic leuco dye is stable enough not to be oxidized by oxygen of the air or by simple heating and to limit the fog formation after development.

Abstract: In a heat-developable color photosensitive material comprising a photosensitive silver halide, a dye providing compound, and a binder on a support, the content of calcium is controlled to 500 ppm or more based on the total weight of the binder, allowing the use of inexpensive binders. The photosensitive material is cost effective and forms an image with a low fog density (Dmin) and a high image density (Dmax).

Abstract: A thermal-dye-bleach construction comprising a dye in association with a thermal dye-bleaching agent of general formula I: ##STR1## wherein: each of R.sup.a and R.sup.b are individually selected from: hydrogen, an alkyl group, an alkenyl group, a cycloalkyl group, an aralkyl group, an aryl group, and a heterocyclic group, and preferably, both R.sup.a and R.sup.b represent hydrogen;p is one or two, and when p is one, Z is a monovalent group selected from: an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an aryl group, and a heterocyclic group, and when p is two, Z is a divalent group selected from: an alkylene group, an arylene group, an alkenylene group, an alkynylene group, an aralkylene group, a cycloalkene group, and a heterocyclic group; and,M.sup.+ is cation which will not react with acarbanion generated from the thermal-carbanion-generating agent in such manner as to render the carbanion ineffective as a bleaching agent for the dye.

Abstract: A p-phenylenediamine series color developing agent or a precursor thereof having a substituent A at the ortho-position; Substituent A: ##STR1## wherein R.sup.1 represents a hydrogen atom or an alkyl group and X represents --O--R.sup.7 or ##STR2## wherein R.sup.7 represents an alkyl group, an aryl group, or a heterocyclic ring and R.sup.8 and and R.sup.9, which may be the same or different, each represents a hydrogen atom, an alkyl group, an aryl group, or a heterocyclic ring, R.sup.8 and R.sup.9 may combine with each other to form a heterocyclic ring, and a process for forming an image which comprises imagewise exposing a silver halide color photographic material and thereafter color developing the color photographic material in the presence of a p-phenylenediamine series color developing agent or a precursor thereof having the aforesaid substituent A.

Abstract: A diazo heat-sensitive recording material which comprises a support having thereon a heat-sensitive recording layer comprising a diazo compound, a coupling component, a basic substance, and a binder; wherein the coupling component is an acylacetanilide represented by the formula (I): ##STR1## wherein R.sub.1 is substituted or unsubstituted alkyl or aryl; R.sub.2 is substituted or unsubstituted alkyl or aralkyl; R.sub.3 is substituted of unsubstituted alkyl, alkoxy, aralkyloxy, alkylthio, or aralkylthio, substituted amino, or halogeno; the total number of carbon atoms in R.sub.2 and (R.sub.3).sub.n is 5 or more; n is zero or an integer of from 1 to 4; and the R.sub.3 's may be the same or different when n is 2 or more, which is useful for forming a yellow color image and providing a developed color image with higher light-fastness, less soiling of a non-image area, and improved uniformity in color-developing layer due to the use of a more oil-soluble coupling component.

Abstract: An exposure apparatus for exposing light-sensitive recording medium through a superposed image original, the exposure apparatus comprising at least one light source, an element transmissive to actinic radiation emitted from the light source positioned between the light source and the image original, the element capable of holding the image original against the heat-developable light-sensitive recording medium, and at least one interference filter disposed between the light source and the image original during exposure. The invention is further directed to an image forming process using the exposure apparatus.

Abstract: A photothermographic element comprising a photosensitive silver halide, an organic silver salt and a reducing agent in concentrations such that imagewise exposure to actinic radiation generates from the silver halide a catalyst which accelerates an image-forming reaction between the organic silver salt and the reducing agent is processed by a method comprising the steps of (1) imagewise-exposing the element to actinic radiation to form a latent image therein, (2) subjecting the imagewise-exposed element to a first heating step at a temperature and for a time sufficient to intensify the latent image but insufficient to produce a visible image, and thereafter (3) subjecting the element to a second heating step at a temperature and for a time sufficient to produce a visible image.

Abstract: A photothermographic composite structure for use in a solvent-free dye thermal positive imaging diffusion-transfer process comprising:(a) an image-receiving element comprising a polymeric dyeable image-receiving layer having a glass transition temperature in the range of 20.degree. to 200.degree. C., and(b) strippably adhered to said image-receiving element, an imageable photothermographic element comprising in at least one layer thereof a binder, a silver source material, photosensitive silver halide in catalytic proximity to said silver source material, and a formazan dye.

Abstract: A process for forming a dye image including the steps of: (a) exposing a photographic element comprising a light sensitive silver halide emulsion layer containing a color coupler compound capable of forming a heat transferable dye upon development; (b) developing the exposed element resulting from step (a) with a color developer solution to form a heat transferable dye image; (c) heating the exposed, developed element resulting from step (b) to thereby transfer the dye image from the emulsion layer to a dye receiving layer which is part of the photographic element or part of a separate dye receiving element brought into contact with the photographic element; and (d) separating the emulsion layer from the dye receiving layer containing the transferred dye image; wherein the color coupler compound is of the following formula (I):COUP--B (I)wherein COUP represents a coupler moiety capable of forming a heat transferable dye upon reaction of the coupler compound with an oxidized product of the developing solution

Abstract: There is disclosed a method for processing a silver halide color photographic material containing a yellow coupler represented by formula (Y) with a color developer containing an aromatic primary amine color developing agent and a polymer of vinyl alcohol or vinyl pyrrolidone series. The disclosure described provides a method for development processing wherein yellow stain and processing nonuniformity in a running processing can be prevented effectively.

Abstract: A novel class of N-substituted triarylmethane sulfonamides is provided which undergo reversible oxidation into colored form and reversible reduction of the oxidized form into colorless form. Preferred embodiments comprise xanthene sulfonamides having N-aryl substituents, e.g., hydroquinone substituents. These compounds possess redox potentials ranging between about +200 to -500 millivolts and thus are useful as dyes for producing photographic, photothermographic, thermal, and pressure-induced images, as well as being useful as redox indicators in a wide variety of biological and chemical reactions.

Abstract: A novel light-sensitive heat-sensitive composition is disclosed, comprising a photohardenable composition, a dye which discolors upon reacting with a base, and a base precursor. A novel light-sensitive heat-sensitive recording material is also disclosed, comprising a support having provided thereon the above described light-sensitive heat-sensitive composition. In a preferred embodiment, the dye is a spectral sensitizing dye for the photohardenable composition. Furthermore, a novel image formation process is disclosed, comprising the steps of: (a) imagewise exposing the light-sensitive heat-sensitive recording material to light to cure the exposed portions of the recording material; and (b) uniformly heating the imagewise exposed recording material to discolor the dye in the unexposed portions thereof.

Abstract: The present invention relates to an azomethine compound represented by formula (I): ##STR1## wherein X represents a 5- or 6-membered cyclic amino group, R represents an aromatic group, and Ar represents an aromatic group having an aliphatic amino group in the para-position. The azomethine compounds disclosed are useful yellow dyes for photography, for various optical filters, for ink jet, for heat transfer printing, and for printing.

Abstract: A method for processing an imagewise exposed color photographic material using fast developing time while maintaining stable processing conditions, reduced developer replenishing, and light fastness of developed color images. The method comprises developing a color photographic material containing silver halide grains comprising (i) substantially no silver iodide and (ii) at least about 80 mol % silver chloride with a developer comprising (i) substantially no benzyl alcohol and (ii) a p-phenylenediamine derivative represented by the formula (I): ##STR1## wherein R.sup.1 and R.sup.2 each represents an alkyl group having from 1 to 4 carbon atoms and R.sup.2 represents a straight chain or branched alkylene group having 3 or 4 carbon atoms and wherein the developing is for a period of time of less than 30 seconds.

Abstract: A heat-developable color photographic material comprising a support having thereon at least a light-sensitive silver halide, a binder, at least one of an electron-donating agent and a precursor thereof, a reducible dye-forming compound which releases a diffusible dye by reduction and an electron-transferring agent, wherein an electron-transferring agent precursor co-exists together with the electron-transferring agent.

Abstract: The present inventions relate to a processing method for processing, with a developing time of not more than 180 seconds, a silver halide color photographic light-sensitive material comprising a support, provided thereon, with at least one silver halide emulsion layer, and at least one emulsion layer containing silver iodo-bromide with not less than 0.5 mole % of silver iodine, in particular to an active processing method wherein, a light-sensitive material B not only containing silver iodo-bromide with an iodine content of not less than 0.5 mole % but also a magenta coupler and providing a maximum magenta density, after exposed, and being capable of only satisfying the maximum magenta dye density M of M<2.0 if exposed under specific conditions and then subjected to color developing of a duration of three minutes 15 seconds at 38.degree. C. with a specific developer solution, is capable of offering a maximum magenta density satisfying M.gtoreq.2.

Abstract: A method of forming a color image comprising subjecting an imagewise exposed color photoraphic material to color development at a temperature of from 30.degree. C. to 50.degree. C.

Abstract: Disclosed is a heat-developable color photographic material containing a compound represented by Formula (1) shown below: ##STR1## wherein X represents a halogen atom, and Y represents a group of nonmetallic atoms necessary for forming a nitrogen-containing heterocyclic ring bearing on the ring at least one substituent having 4 or more carbon atoms.Disclosed is also a process for forming an image on a heat-developable color photographic material, which comprises carrying out heat-development processing in the presence of the compound represented by Formula (1) mentioned above.

Abstract: A method for forming an image comprising heating a heat-developable light-sensitive material comprising a support having thereon at least a light-sensitive silver halide and a binder, simultaneously with or after imagewise exposure thereof in the presence of water, at least one of a base and a base precursor, and an acetylene compound represented by formula (I):R.sub.1 --C.tbd.C--R.sub.2 (I)wherein R.sub.1 and R.sub.2 each represents a hydrogen atom, a carboxyl group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted alkoxycarbonyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, or a substituted or unsubstituted carbamoyl group; provided that both R.sub.1 and R.sub.2 do not represent hydrogen atoms at the same time.

Abstract: A heat developable photosensitive material comprising a support having thereon at least one photosensitive silver halide emulsion layer, which contains at least one compound selected from those represented by the following general formulae (I) and (II) to acquire a high S/N ratio and high sensitivity: ##STR1## wherein R represents an alkylene group, an alkenylene group, an aralkylene group or an arylene group, which each may be substituted; Y represents ##STR2## R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9 and R.sub.

Abstract: A method of heating an image formation sheet of the present invention comprises heating while winding the image formation sheet around the periphery of a drum during heat developing and heat transfer. When the total length of the image formation sheet is greater than the length of a contact portion on the periphery of a drum, the image formation sheet and a sheet on which an image is formed are heated while being conveyed at a constant speed so that the heating time is over a given value. While when the total length of the image formation sheet is less than the length of the contact portion on the periphery of the drum, the image formation sheet is wound around the drum at a speed higher than the constant speed, and is heated for development in a stationary state, and is subsequently separated from the drum at the higher speed than the constant speed.

Abstract: A novel heat developable light-sensitive material is disclosed, comprising light-sensitive silver halide emulsion layers on a paper support, wherein at least one subbing layer capable of inhibiting fog is provided interposed between the undermost layer among said light-sensitive silver halide emulsion layers and said paper support. In a preferred embodiment, the subbing layer comprises a binder and at least one material capable of inhibiting fog.

Abstract: The present invention provides a photographic material containing a non-photosensitive silver salt comprising a photosensitive silver halide, a non-photosensitive silver salt, a reducing agent, a polymerizable compound and a color image-forming substance provided on a support, wherein at least said polymerizable compound and said color image-forming substance are contained in the same microcapsules so that said color image-forming substance may be converted into an imagewise immobile state after the material has been imagewise exposed to light and then heated. Said material has a high sensitivity and may form a color image having an absorption in a visible range, by light-exposure for a short period of time followed by a dry and rapid photographic treatment.

Abstract: Color images with improved Dmin/Dmax-relationship can be obtained from color photographic recording materials comprising color providing compounds in association to silver halide emulsion layers and comprising an additional binder in said silver halide emulsion layers or in adjacent non-lightsensitive layers a polymer having recurring structural units of a polymerized monomer which contains at least one urethane and/or urea group.