Abstract: A photosensitive microcapsule which contains a polymerizable monomer and a polymerization initiator has increased sensitivity due to the displacement of soluble water in the monomer photosensitive microcapsule comprises a polymerizable monomer contained in a microcapsule; a photopolymerization initiator comprising a hydrophobic sensitizer for initiating polymerization of the polymerizable monomer in response to incident light energy; and an image producing material such as a dye or a precursor; wherein the hydrophobic sensitizer includes at least one of 3,7-bis (octadecylmethylamino) phenothiazoniumchloride which reacts on a red color light energy, 3,7-di(octadecylmethylamino)-5-phenylphenaziniumchloride which reacts on a green color light energy, and 3,6-di(octadecylmethylamino)-acridinechloride which reacts on a blue color light energy.

Abstract: This invention relates to an imaging element for reductive laser-imaging comprising a support having thereon an imaging layer comprising:a) a reducible Co(III) ammine complex,b) a source of phthalaldehyde, andc) a reducing agent,the imaging layer having an infrared-absorbing material associated therewith in the amount of about 0.001 to about 0.5 g/m.sup.2 of element, and wherein the imaging element has a Lewis acid-containing overcoat layer thereon.

Abstract: This invention relates to an imaging element for reductive laser-imaging comprising a support having thereon an imaging layer comprising:a) a reducible Co(III) ammine complex,b) a source of phthalaldehyde, andc) a reducing agent,the imaging layer having an infrared-absorbing material associated therewith in the amount of about 0.001 to about 0.5 g/m.sup.2 of element.

Abstract: An image forming element and an image forming method using the same are disclosed. The element comprises a support having thereon a image forming layer comprising a binder, an aromatic aldehyde, a cobalt (III) complex represented by formula I, and a compound represented by formula II or formula III;Co.sup.3 +(L)p(X)q (I)wherein L is a coordination compound capable of forming a complex compound with the cobalt cation and at least one of which is NH.sub.3 or a primary amine; X is a counter anion; p is an integer of 1 to 6; when p is 2 to 6, the plural Ls may be the same or different; and q is an integer of 1 to 3, ##STR1## wherein lig is a coordination compound capable of forming with the cobalt cation; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each independently an alkyl group, an aryl group, an aralkyl group, an alkenyl group, an alkinyl group, a cycloalkyl group, a heterocyclic group or a cyano group; n.sub.1 is an integer of 1 to 6, when n.sub.

Abstract: Disclosed is a magnetic recording element comprising a support having coated on at least one major surface thereof a layer of a magnetic recording medium and a photosensitive layer which may be separate from or integral with the magnetic recording layer and which contains an infrared absorbing dye or its precursors. Information can be imparted to the photosensitive layer by imagewise exposure to actinic radiation which will either promote or inhibit generation or destruction of the infrared absorbing dye.

Abstract: A process for producing an image uses an imaging medium comprising an acid-generating layer or phase comprising a mixture of a superacid precursor, a sensitizing dye and a secondary acid generator, and a color-change layer comprising an image dye. The sensitizing dye has a unprotonated form and a protonated form, the protonated form having substantially greater substantial absorption in a first wavelength range than the unprotonated form. The superacid precursor is capable of being decomposed to produce superacid by radiation in a second wavelength range, but is not, in the absence of the sensitizing dye, capable of being decomposed by radiation in the first wavelength range. The secondary acid generator is capable of acid-catalyzed thermal decomposition by unbuffered superacid to form a second acid.

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: Certain squaric acid derivatives are useful for the thermochemical generation of acid. The squaric acid derivatives may be used in imaging media in conjunction with acid-sensitive materials which undergo a color change when contacted by the acid generated from the squaric acid derivatives. Preferably, the acid-sensitive materials undergo an irreversible color change, so that the image can be fixed by neutralizing all the acid generated with excess base, thereby preventing further color change in the image during long term storage.

Abstract: An infra-red sensitive acid-generating medium comprises a binder, an iodonium salt; and a squarylium dye capable of absorbing infra-red radiation having a wavelength within the range of about 700 to about 1200 nm, the dye having a squarylium ring the 1- and 3-positions of which are each connected, via a single sp.sup.2 carbon atom, to a pyrylium, thiopyrylium, benzpyrylium or benzthiopyrylium nucleus, at least one of the sp.sup.2 carbon atoms having a hydrogen atom attached thereto, and the 2-position of the squarylium ring bearing an O.sup.-, amino or substituted amino, or sulfonamido group.

Abstract: An imaging element is disclosed comprising on a support a dye precursor and a color developer arranged in the same layer or in separate layers characterized in that a specific type of monomers according to one of formulas (I) or (II) and a photoinitiator is present in a layer containing said dye precursor and/or color developer. The imaging element of the invention can used as photosensitive as well as heat-sensitive imaging element for obtaining an image.

Abstract: A photosensitive element for the production of near infrared absorbing images having a photosensitive medium comprising a trialkyl orthoester, a photochemical source of a strong acid and a compound of the formula (I): ##STR1## wherein: n is 0 or 1,R.sup.1 and R.sup.2 are independently members selected from the group consisting of hydrogen and alkyl groups of up to 5 carbon atoms andAr.sub.1 and Ar.sub.2 are independently members selected from the group consisting of aryl groups bearing an electron-donating substituent in the 4-position.

Abstract: A light-sensitive heat-sensitive recording material is disclosed, which contains microcapsules resulting from a solution containing at least one component capable of undergoing color development or achromatization as a core material of the microcapsules and a volatile solvent which has a water solubility of 10% by volume or less and has a low boiling point such that it volatilizes during a process for preparing said light-sensitive heat-sensitive recording material leaving substantially no trace of the solvent in the resulting recording material. As the microcapsules, ones having a mean particle size of 2 .mu.m or less are preferred, and ones prepared using a modified gelatin as a protective colloid are also preferred. Further, as the support of the light-sensitive heat-sensitive recording material, a polyester support filled with a white pigment can preferably be used.

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: Acid can be generated by exposing a superacid precursor to actinic radiation effective to generate superacid from the superacid precursor and heating the superacid in admixture with a squaric acid derivative in which there is bonded to the squaric acid ring, via an oxygen atom, an alkyl or alkylene group, a partially hydrogenated aryl or arylene group, or an aralkyl group. The superacid catalyzes decomposition of the squaric acid derivative, thus increasing the quantity of strong acid present in the medium. The resultant acid can be used to effect a color change in an acid-sensitive material, so providing an imaging process.

Abstract: A method of printing an image on a substrate by applying to the substrate a film which is chemically activated by heat, and scanning the film by a beam of radiation according to the image to be printed, to chemically activate the film by heat and thereby to produce a pattern in the film according to the image scanned. The film includes a reagent capable of undergoing a redox reaction when heated in the presence of another reagent present with the film when scanned by the beam, to produce the redox reaction between the two reagents.

Abstract: An information recording medium comprises a recording layer including a mixture of organic polysilane and oxo metallic phthalocyanine pigment. Information is recorded by adding heat or light to the recording layer. In a method for recording information onto the information recording medium, a decoloring reaction of oxo metallic phthalocyanine pigment is used which is caused by heating the recording layer to a temperature equal to or higher than a pyrolyzing point of organic polysilane.

Abstract: A recording material comprising a support coated with a photosensitive layer comprising a photosensitive diazo compound enclosed in microcapsules and a coupling component. The microcapsules are produced by forming an organic solution containing the diazo compound and a wall monomer, and emulsifying the organic solution in an aqueous solution containing an anionic surface-active agent and polyvinylpyrrolidone to produce oil droplets containing the wall monomer. The wall monomer is polymerized to form a wall around the oil droplets. When heat is applied to the photosensitive layer under alkaline conditions, the coupling component reacts with the diazo compound to form a color.

Abstract: A phototranschromic ink suitable for use in a printing machine, including a water soluble, inert, nonionic polymeric resin carrier base having film forming properties, a photo acid or photo base progenitor which releases or takes up protons upon exposure to light, a pH sensitive dye which changes color in response to a change in proton levels, a water compatible non-ionic wetting agent, a water compatible non-ionic thickening agent, a neutral water soluble flow aid; wherein said ink changes color upon exposure to ultraviolet radiation and is of suitable consistency for use in a printing machine.

Abstract: Acid can be generated by exposing a mixture of a superacid precursor and a dye to actinic radiation of a first wavelength which does not, in the absence of the dye, cause decomposition of the superacid precursor to form the corresponding superacid, thereby causing absorption of the actinic radiation and decomposition of part of the superacid precursor, with formation of a protonated product derived from the dye, then irradiating the mixture with actinic radiation of a second wavelength, thereby causing decomposition of part of the remaining superacid precursor, with formation of free superacid. Preferably, following these irradiations, the imaging medium is heated while the superacid is admixed with a secondary acid generator capable of being thermally decomposed to form a second acid, the thermal decomposition of the secondary acid generator being catalyzed by the presence of the superacid.

Abstract: Certain squaric acid derivatives are useful for the thermochemical generation of acid. The squaric acid derivatives may be used in imaging media in conjunction with acid-sensitive materials which undergo a color change when contacted by the acid generated from the squaric acid derivatives. Preferably, the acid-sensitive materials undergo an irreversible color change, so that the image can be fixed by neutralizing all the acid generated with excess base, thereby preventing further color change in the image during long term storage.

Abstract: In an optical recording medium, a light absorbent can be incorporated into a color-developing layer without separately constituting a light absorbing layer by holding the light absorbent in a dispersed or dissolved state in a solvent soluble or heat fusible material. Thus, an optical recording medium which exhibits satisfactory image density with a small amount of the light absorbent can be provided.

Abstract: This invention relates to novel thermochromic quaternized polyacetylene salt derivatives which are visually imageable by exposure to a light source generating energy in a wavelength of from about 400 nm to about 1500 nm said salt derivative having a thermosensitivity of at least 50.degree. C. and defined by the formula ##STR1## or a homopolymer thereof wherein X is the N-quaternized monovalent radical of a dye having an optical absorbance in a wavelength of from about 400 nm to about 1500 nm; V is the cationic residue of a carboxyl, sulfonate, thioate, thiolic, thionic or phosphonate radical; n has a value of from 2 to 4 and X' is hydrogen, C.sub.4 to C.sub.25 alkyl, a polar hydrophilic group which promotes hydrogen bonding containing a radical of the group of an amino, amido, hydroxy, ester, ether, phenol, carboxy, halo, sulfonyl, sulfoxy, sulfinyl, silyl, silyoxy, phosphoro, phosphate, keto, carbamate, aldehyde, urea, urethane, a metal salt group or X' is selected from the group defined for X.

Abstract: A light- and heat-sensitive composition which contains a photo-hardenable composition and at least one dye, a light- and heat-sensitive recording material which contains a support having the composition provided on at least one side thereof, and an image-forming process using the recording material are disclosed.

Abstract: Photothermographic imageable layers comprise a photobleachable dye, a nitrate salt, a leuco dye, a binder, and an optional organic acid. These systems may be used in a variety of applications comprising single or multiple layers in either single or multiple sheet constructions to provide color imaging elements.

Abstract: Negative-acting photothermographic imaging systems with improved color fidelity and light fastness are disclosed comprising a photobleachable sensitizer, a nitrate salt, an initiator, a leuco dye, a binder, and an optional organic acid. These systems may be used in a variety of applications comprising single or multiple layers in either single or multiple sheet constructions to provide color imaging elements.

Abstract: Novel thermally sensitive imageable layers comprising a leuco dye oxidizing acid salt are disclosed, wherein said acid consists of a Group V, VI, or VII element and oxygen.

Abstract: A photochromic compound represented by the following general formula [I] ##STR1## wherein ##STR2## represents a divalent aromatic hydrocarbon group or a divalent heterocyclic group each of which may have a substituent,R.sub.1 represents a monovalent hydrocarbon group or a monovalent heterocyclic group each of which may have a substituent, ##STR3## represents a norbornylidene or adamantylidene group which may have a substituent,X represents an oxygen atom or a group of the formula >N--R.sub.3 in which R.sub.3 represents a hydrogen atom or a hydrocarbon group which may have a substituent, andR.sub.2 represents a monovalent hydrocarbon group which may have a substituent.Also provided are a process for production of the photochromic compound, a composition containing the photochromic compound, and the use of the photochromic compound. The colored form of this photochromic compound has excellent thermal stability.

Abstract: Disclosed are photothermographic constructions containing at least a plurality of light-sensitive layers which are separated by barrier layers composed of a polymer, e.g., ethyl cellulose and polyethylene terephthalate, having an energy activation of permeability (E.sub.p) of less than about 30 kJ/mole. The barrier layers must be substantially insoluble in the light sensitive layers and vice versa. Each light sensitive layer contains a nitrate salt, leuco dye, binder, and optionally, a photoinitiator. The photothermographic construction is capable of effectively reproducing full color images.

Abstract: A radiation responsive composition containing a compound represented by the following formula (I) and a photoreducing agent capable of forming a redox couple together with said compound for many uses, e.g., image formation, etching, plating, etc.: ##STR1## wherein N represents a nitrogen atom; X represents an oxygen atom (--O--), a sulfur atom (--S--), or a nitrogen-containing group of formula, ##STR2## R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each represents a mere bond, a substituted or unsubstituted alkyl, aryl, heterocyclic, acyl, aralkyl, alkenyl, alkynyl or carbamoyl group, or a sulfonyl group into which a substituted or unsubstituted alkyl or aryl group has been introduced, provided that at least one of the substituents R.sup.1 to R.sup.3 be a substituted or unsubstituted aryl or heterocyclic group and that two or more of R.sup.1, R.sup.2 and R.sup.3, or of R.sup.1, R.sup.2, R.sup.3 and R.sup.

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.

Abstract: An image-forming material comprising: (a) microcapsules, in which at least one leuco dye capable of developing a color by oxidation and at least one photooxidizing agent (preferably a combination of a lophine dimer and an organic halogeno-compound) are enclosed together, and (b) at least one reducing agent not enclosed in the microcapsules (preferably present in the form of an emulsified dispersion), thereby achieving image formation in a completely dried condition, and ensuring excellent freshness keeping property, image reproducibility and fixability.

Abstract: A method of coding an optically-readable medium comprises: applying to the medium at least one coating of a heat-sensitive material to produce a specified combination of at least two optical changes as a function of time when heated to a predetermined temperature above ambient; heating the medium to the predetermined temperature; and sensing the optical changes undergone by the medium to determine whether the sensed changes match the specified combination. The method and apparatus are described particularly to an optically-readable medium wherein the heat-sensitive coating is in a plurality of windows formed in the medium, each window signifying a value element.

Abstract: A compound represented by the following general formula [I] ##STR1## wherein ##STR2## represents a norbornylidene group or an adamantylidene group each of which may have a substituent, andX represents an oxygen atom, the group >N-R.sub.2, the group >N-A.sub.1 -B.sub.1 --A.sub.2).sub.m (B.sub.2).sub.n R.sub.3, the group >N-A.sub.3 -A.sub.4, or the group >N-A.sub.3 -R.sub.4, provided that when ##STR3## is an adamantylidene group, X is selected from the above groups excepting the oxygen atom and the group >N-R.sub.2 ; and plastic lens containing the compound of the above formula [I].

Abstract: A thermosensitive recording method which comprises heat-treating compounds A and B constituting a coloring matter resulting in sublimation or evaporation to thereby bring these two compounds into contact with each other on a recording sheet, resulting in a color image on the recording sheet.

Abstract: An optical recording method comprises the steps of:(A) irradiating a radiation corresponding to a recording information on an optical recording medium having a recording layer containing a diacetylene derivative and at least one selected from the group (hereinafter called the group B) consisting of azulenium salt compounds, pyrylium dyes, diene compounds, croconic methine dyes and polymethine compounds, thereby forming a latent image; and(B) irradiating a radiation on the recording medium having said latent image formed thereon to thereby visualizing said latent image.

Abstract: A photosensitive article comprises a substrate of a triacetate or other polyester film or paper coated with a layer of a photosensitive composition. The photosensitive composition includes at least one photodissociable choline compound sensitive to x-rays or radiation of shorter wave lengths, at least one image-forming compound capable of producing a dye by reaction with the dissociation products of the choline compound, a water soluble polymeric binder and a low melting point fatty acid salt for heat development. The photosensitive article can be used to produce an x-ray image by exposing the article image-wise to x-rays and heating the exposed article to develop the image.

Abstract: 3,7-Diamino phenazine leuco dyes stabilized in the 10-position with acyl substituents, said acyl substituents being themselves substituted with electron withdrawing groups. These dyes are suitable for use in thermographic imaging systems wherein the leuco dye is in a composition containing a nitrate salt.

Abstract: Novel adducts of phthalaldehyde are disclosed, as well as imaging compositions and imaging elements incorporating them. A method is also disclosed for minimizing dimensional changes in the element during processing.

Abstract: A light- and heat-sensitive recording material is disclosed. The material include microcapsule in which are encapsulated a particular combination comprised of a vinyl compound, a photopolymerization initiator, and a color forming component being capable of undergoing a color reaction with another color forming component to cause color formation. These coloring components are provided on the same side of a support.

Abstract: A thermally developable imaging system comprises a leuco dye, nitrate ion, and a spectrally sensitized organic compound having photolyzable halogen atoms.

Abstract: Phenylurethane compounds formed by the reaction between a phenolic coupler compound and an organic isocyanate compound are utilized to form phenolic coupler compounds in situ in order to react with chromogenic compounds present in the sensitive layer of recording or reproducing materials.The phenolic coupler compounds can also be stabilized by blocking the phenolic hydroxyl with carbonate, an alkyl ether, organosilylated ether or organophosphoric acid ester, some of which are novel compounds. These stabilized derivatives of the stabilized phenolic coupler compound will decompose by application to sufficient thermal energy or suitable liquid or gaseous fluid to form the phenolic coupler compound in situ. The phenolic coupler compound is formed in situ by applying thermal energy to the sensitive layer or by applying to the sensitive layer a liquid or gaseous fluid which is able to decompose the stabilized phenolic coupler compound and release the phenolic coupler compound.

Abstract: Synergistic combinations for use in stabilizing thermographic imaging systems comprise (1) one or more aromatic compounds which form quinones, diimines, or quinonimines upon oxidation in combinaton with (2) 1-phenyl-3-pyrazolidinone, or derivatives or 1-phenyl-3-pyrazolidinone. When used in a thermographic imaging system comprising a nitrate salt, and a leuco dye in a binder these stabilizing combinations prevent oxidation and premature reaction of the leuco dye.

Abstract: A photosensitive recording material which includes in a supported layer a mixture of photosensitive substances in admixture with one or more polymers that are soluble in an alkaline aqueous liquid, characterized in that such mixture of photosensitive substances essentially consists of:(A) at least one photosensitive nitrone of the formula: ##STR1## in which: R is an aromatic hydrocarbon group including a substituted aromatic hydrocarbon group,R.sup.

Abstract: Novel adducts of phthalaldehyde are disclosed, as well as imaging compositions and imaging elements incorporating them. A method is also disclosed for minimizing dimensional changes in the element during processing.

Abstract: A novel light sensitive, heat developable imaging system incorporating a diazonium salt and a leuco dye in a binder is disclosed.

Abstract: Permanent records of X rays or radiations of shorter wavelengths are formed on a film substrate by direct exposure to the radiation and heat development. The process is not sensitive to visible radiation and can therefore be carried on in daylight. An X ray photosensitive film containing a halogenated photodegradable polymer and an aryl dye promoter reacting to free radicals is exposed to an X ray image and then heated under conditions which allow the free radical generated by the photodegradation of the polymer to migrate and react with the aryl dye promoter to provide the imaging dye. The X ray photosensitive layer of the X ray photosensitive film or paper includes, in addition to the photodegradable polymer and the aryl dye promoter, a heat activable complexing agent and an organic binder. The process can be carried out using currently available X ray equipment with the advantage of handling the film in daylight and eliminating chemical development.

Abstract: A thermally developable imaging system comprises a leuco dye, nitrate ion, and a spectrally sensitized compound selected from (1) aromatic iodonium salts and (2) compounds of photolyzable halogen atoms.

Abstract: A thermographic imaging system comprising a single layer and capable of providing a stable dark to black image upon localized heating is disclosed. The single layer comprises a polymeric binder, a combination of at least two leuco dyes, and a nitrate salt.

Abstract: Oxoindolizine and oxoindolizinium dyes are useful in photographic materials and processes as image dyes. These dyes are formed in unexposed areas of photographic materials, especially photothermographic materials, by the reaction of a photosensitive cyclopropenone with a pyridine compound. Oxoindolizine and oxoindolizinium dyes are alternatively formed by (1) reaction of a photosensitive cyclopropenone with a pyridine compound and (2) reaction of the resulting product with a color forming coupler. The photographic material is imagewise exposed and then heated to a processing temperature to form a dye image. Alternatively, the oxoindolizine and oxoindolizinium dyes are produced by imbibing at least one of the reactants into the photographic material comprising a photosensitive cyclopropenone.

Abstract: A non-silver light-sensitive composition according to the invention consists of the following components, in percent by weight;______________________________________ a hydroxyderivative of naphthalene 1 to 10 an aromatic amine 29 to 60 saturated halogenated hydrocarbon 35 to 29 a polymeric binder 35 to 1. ______________________________________The composition of the present invention makes it possible to produce light-sensitive layers which have an increased sensitivity (2.times.10.sup.-4 J/cm.sup.2 at 365 nm) and a low optical fog density (D. below 0.05).