Abstract: A dye solvent useful as a material for microcapsules necessary for the manufacture of pressure-sensitive manifold paper. This solvent essentially consists of a hydroaromatic compound for pressure-sensitive manifold paper. The compound is a polycyclic aromatic compound with three or more aromatic rings, some of which rings have been hydrogenated and exhibits solvency, particularly, for a black pigment and a blue pigment of leuco dye.

Abstract: A donor sheet for pressure-sensitive image recording which comprises a support, an undercoating layer applied onto said support, and an overcoating layer applied onto said undercoating layer, said undercoating layer comprising microcapsules containing a solid wax, and said overcoating layer comprising microcapsules containing an image-forming component. By using said donor sheet, record images having a sufficiently high color density and a high resolution degree can be formed on a receptor sheet.

Abstract: The present invention is directed toward a heat development copying material, comprising a support having provided thereon a photosensitive layer containing a diazo compound, a coupling component, a color-forming assistant, and a film-forming high polymeric binder; and a light-insensitive intermediate laeyr containing a film-forming high polymeric binder, and at least one member selected from the group consisting of a coupling component and a color-forming assistant, wherein the light-insensitive intermediate layer is provided between the support and the photosensitive layer, and a method for forming an image using the above-described copying material.

Abstract: A description is given of a process for microencapsulating hydrophobic oils with color reactants of color reaction systems dissolved therein, a cationized melamine/formaldehyde precondensate being precipitated in ultra-fine suspension from its acid aqueous solution, accompanied by vigorous stirring and by modifying the solubility conditions, said suspension is mixed under vigorous stirring with a hydrophobic oil containing the color reactants in dissolved form, the oil-in-water dispersion obtained is adjusted acid and an aqueous solution of a water-soluble, nonionic melamine/formaldehyde precondensate is added, accompanied by stirring, for forming the microcapsule envelope.

Abstract: A carbonless paper construction for imaging via electrophotographic copiers comprising microcapsules encapsulating solvents of dialkyl esters of aliphatic dibasic organic acids, polyglycol ethers and alkyl ethers of monobasic aromatic acids.

Abstract: Pressure-sensitive copying paper of particular suitability for the production of business forms sets by xerographic photocopying processes (including laser printing processes) carries, as loadings within the thickness of the paper:(a) inorganic color developer material; and(b) microcapsules containing a substantially colorless chromogenic material;and is characterized in that it has:(i) a mean Bendsten roughness on its top side up to 880 ml.min.sup.-1 ;(ii) a mean Bendsten porosity of up to about 200 ml.min.sup.-1 ; and(iii) an ex-mill moisture content of not more than about 5.5%, based on the total weight of the paper.The use of paper as defined above minimises jamming and other problems commonly encountered when attempting to produce business forms sets from pressure-sensitive copying papers by xerographic photocopying processes.

Abstract: A method for the manufacture of microcapsules for use in pressure-sensitive recording sheets is disclosed, which comprises after dispersing and emulsifying in a hydrophilic liquid a solution obtained by dissolving (a) a polyisocyanate, (b) an alkyleneoxide adduct of an amine and (c) an electron-donating color former in a hydrophobic liquid, adding a polyamine to the emulsified dispersion and forming microcapsules of poly(urethane urea) around the liquid droplets containing the color former.

Abstract: The process of the present invention uses an aminoaldehyde polycondensate as capsule-wall and a hydrophobic core material dispersed in an aqueous acidic solution containing an anionic water-soluble colloidal substance, wherein it is characterized in that the anionic water-soluble colloidal substance comprises a mixture of an anionic water-soluble substance having a high viscosity and that having a low viscosity.The process of the present invention provides a slight viscosity rise in the encapsulation, a capsule slurry with a high concentration, low viscosity, and a slight smudging in the application as a pressure-sensitive recording sheet and the like, compared with the conventional processes.

Abstract: This invention discloses a photo- and heat-sensitive recording material excellent in fixability comprising a support having on one side of which at least one photo- and heat-sensitive layer having a haze % of less than 60 and containing a diazo compound and a coupler, wherein either the diazo compound or the coupler is enclosed in a microcapsule and a process to manufacture it.

Abstract: A recording medium which enables formation of an image on any desired substrate is disclosed, which comprises a support having provided thereon at least a color developer capable of color-forming reaction with a dye precursor, and an adhesive such as heat-sensitive adhesives, tackifying composition, etc.

Abstract: A postal card or mailer construction comprising a cover sheet adhered to a base sheet is provided which is simple to manufacture and print by automated systems and which is capable of providing hidden confidential information to an addressee. Upon receipt, the addressee can readily peel back the cover sheet and read the confidential information. Through the use of a releasable adhesive, once delaminated, all surfaces of the postal card construction have nontacky surfaces, permitting easy handling and storage by the recipient. The construction includes a base sheet, a cover sheet overlying the base sheet, and a releasable adhesive securing a first surface of the cover sheet to a first surface of the base sheet such that the cover sheet and base sheet are readily separable. The releasable adhesive contains therein a first color former composition which, when exposed to a second color developer composition, forms a distinctive color.

Abstract: In a process for the production of microcapsules by coavervation of gelatin, carboxymethyl cellulose (CMC) and a second anionic polymer such as a polyvinylmethylether/maleic anhydride copolymer or an ethylene/maleic anhydride/copolymer, the weight ratio of gelatin:CMC is chosen to be in the range 1:0.14 to 1:0.05, and the CMC used is chosen to have a viscosity in the range of from 50 to 140 mPas (cps), when measured in 6.0% by weight aqueous solution at 20.degree. C. using a Brookfield RVT viscometer, Spindle No. 1, 10 r.p.m. The use of the specified weight ratio and CMC type permits significant increases in the solids content at which encapsulation can be carried out without increasing process viscosities to an unacceptable extent and/or giving rise to poor quality microcapsules. The process is particularly suitable for producing microcapsules for use in pressure-sensitive copying paper.

Abstract: A transfer recording medium comprises a support and a recording layer formed thereon comprising at least a colorant and a functional component sensitive to provision of light energy and heat energy. The recording layer is composed to have a specifically high sensitivity selective to provision of both light energy and heat energy defined as follows. The adhesion force f.sub.1 between the support and the recording layer and the adhesion force f.sub.2 between the recording layer and a transfer-receiving medium such as plain paper satisfy the relations of f.sub.1 >f.sub.2 at a lower temperature and f.sub.1 <f.sub.2 at a higher heated temperature. A minimum exposure quantity is defined as a minimum quantity of light, with a wavelength to which the functional component in the recording layer is sensitive at 100.degree. C., providing f.sub.1 >f.sub.2 at the higher heated temperature when the recording layer is exposed to the light and then heated. Then, the recording layer provides f.sub.1 <f.sub.

Abstract: Disclosed is a developer sheet useful in forming reproductions having a glossy finish, or in forming transparencies comprising:a support having a layer of a finely divided, thermoplastic, developer material on the surface thereof, said developer material being capable of reacting with a color precursor to produce a visible image and being capable of coalescing into a thin film which imparts gloss to said image upon application of heat and/or pressure, and having a surfactant admixed within said layer of developer material to aid in the coalescing of said developer material into a thin film.

Abstract: An image forming method, comprising: providing a recording medium including a substrate and a transfer recording layer disposed thereon, the transfer recording layer being capable of changing its transfer characteristic when provided with light and heat energies; imparting heat energy to the transfer recording layer and imparting light energy to the transfer recording layer at an elevated temperature under such a condition that at least one of the light and heat energies corresponds to a recording information signal, thereby to form a transferable image in the transfer recording layer; and transferring the transferable image in the transfer recording layer to a transfer-receiving medium wherein at least light energy is imparted to the transfer recording layer prior to the formation of the transferable image.

Abstract: A transfer recording medium comprising a substrate and a plurality of image forming elements bonded thereto by a binder is provided. The surface of each image forming element at least partially protrudes out of the binder. Such transfer recording medium may be prepared by applying the binder onto the substrate in a prescribed thickness, disposing the image forming elements in excess on the binder, and then removing the excess of the image forming elements. The thus prepared transfer recording medium provides an image having a high density and a faithfully reproducible color.

Abstract: A recording medium enabling formation of an image on any desired material is disclosed. The recording medium comprises a base sheet, a thermoplastic resin layer formed on at least one side of the base sheet, and a color developer layer formed on the thermoplastic resin layer and capable of color development by reaction with a dye precursor.

Abstract: This invention relates to a microencapsulated photochromic material and a process for its preparation. More particularly, it relates to a microencapsulated photochromic material having a good durability and a process for its preparation.The present invention further relates to a water-base ink composition comprising said microencapsulated photochromic material.

Abstract: An epoxy microcapsule comprising an oil core material and a microcapsule wall enclosing the oil core material. The microcapsule wall is an interfacial polymerization product of an epoxy resin and a polyamino compound having multifunctional amino groups capable of crosslinking the epoxy resin. The epoxy resin is preferably bisphenol A or bisphenol F based epoxy resin. The polyamino compound preferably has primary and tertiary amino groups. The epoxy microcapsule can be used in carbonless copying systems.

Abstract: A positive or negative latent image can be developed with negatively or positively charged toner particles, respectively, that are microcapsular. The shell material of the toner particles is a melamine-formaldehyde resin or a starch-based material. The core is a liquid solution comprising at least a liquid, ethylenically unsaturated monomer, a leuco dye and a photoinitiator.

Abstract: A coating material for a pressure-sensitive recording sheet comprises both microcapsules A and microcapsules B, wherein the microcapsules A contains a solvent S.sub.1 which dissolves a colorless dye for a pressure-sensitive recording sheet, and the microcapsules B contains a dye-free solvent S.sub.2 which has no ability of dissolving dye and which has a lower boiling point than the solvent S.sub.1. The pressure-sensitive recording sheet using this coating material provides an improved thermal smudge without the deterioration of the image density, etc.

Abstract: The invention relates to a process for producing microcapsules by microencapsulating hydrophobic oils, particularly with substances contained therein, in which the hydrophobic oil is mixed, accompanied by vigorous stirring, into an aqueous medium containing a dispersion-stabilizing compound. The resulting oil-in-water dispersion is acid adjusted, aminoplastic capsules are formed in the conventional manner and the aqueous fraction of the aqueous medium is removed in the usual way. The aqueous medium contains a water-soluble, cationic compound such that it forms a dispersion-stabilizing compound in interaction with the water-soluble, anionic, sulphonated melamine-formaldehyde precondensate. The microcapsules obtained according to this process can be obtained economically without agglomerate formation in the form of dry single capsules e.g. by spray drying the aqueous capsule dispersion obtained. The invention also permits the encapsulation of random substances in dissolved and/or finely dispersed form.

Abstract: Microencapsulated load bearers to prevent the premature rupture of dye precursor-containing microcapsules are formed concurrently in the same microencapsulation process in which oil/dye precursor-containing microcapsules are formed by emulsifying an oily mixture, containing therein a dye-precursor solution and non-rupturable core particles, as droplets into an aqueous solution. The core particle and oil/dye precursor droplets are then microencapsulated to form a binary microcapsule mixture consisting of microencapsulated load bearers and oil/dye precursor-containing microcapsules, respectively. This binary microcapsule mixture in an appropriate solvent vehicle may be used as a coating for the preparation of carbonless copy paper.

Abstract: A recording medium has a recording layer comprising image-forming elements (A), (B) and (C) containing at least a compound having unsaturated double bond and a photopolymerization initiator. The photopolymerization initiator in the element (A) is a compound represented by the following formula (I): ##STR1## (wherein Ar.sub.1 and Ar.sub.2 are ech aromatic ring or heterocyclis ring). The photopolymerization initiator in the element (B) has an absorption maximum in a wavelength region of 360 to 430 nm. The photopolymerization initiator in the element (C) has an absorption maximum in a wavelength region of 430 nm or longer. The recording medium is suitably used as a transfer recording medium in a recording apparatus which includes heating means and light irradiating means to provide the recording layer with heat energy and photoenergy to change the transfer characteristic of the recording layer.

Abstract: A heat-sensitive recording material is disclosed, which comprises a support having provided thereon a transparent heat-sensitive layer comprising color former-containing microcapsules and at least one color developer, wherein the color developer contains a compound represented by formula (I): ##STR1## wherein R represents a hydrogen atom, a halogen atom, an alkoxy group, an alkyl group, or a phenyl group; Ar represents a substituted or unsubstituted aryl group; and n is an integer of from 2 to 10.The heat-sensitive recording material provides a heat-sensitive layer having high sensitivity and good transparency.

Abstract: A multi-color transfer printing medium is comprised of at least two different kinds of microcapsules having a porous membrane and disposed on a substrate. Each kind of microcapsules contains a different electron-donating chromogenic material effective to produce a different color tone, and a different light-absorbing material effective to absorb a light of different wavelength. In use, the multi-color transfer printing medium is superposed with a color developing sheet coated with electron-accepting material, and is irradiated with lights of different wavelengths to transfer-print color image on the developing sheet to thereby obtain the multi-color image with a simple process at high speed.

Abstract: A recording medium comprising a planar substrate, and a layer of microcapsules carried by the planar substrate, each of the microcapsules containing a photosensitive material whose hardness varies upon exposure to a radiation, and a heat-sensitive chromogenic material which produces a color at a temperature higher than a room temperature.

Abstract: An imaging sheet used for achieving color balance in a full-color imaging system is disclosed. The sheet is characterized by utilizing three sets of microcapsules, each containing a different colorless image-agent and a photohardenable or photosoftenable composition, and a corrective dye associated with the substrate. Association of the corrective dye with the substrate achieves color balance by equalizing the speed of the different colorless color-forming microcapsules.

Abstract: A developer composition having improved resistance to vinyl blocking comprising a finely divided thermoplastic phenolic resin and a finely divided thermoplastic vinylic or acrylic resin;the vinylic or acrylic resin is prepared from a monomer composition containing a polar monomer which renders the composition resistant to vinyl plasticizers;developer sheets prepared from the developer composition and processes for forming images utilizing the developer composition are disclosed.

Abstract: A method for forming a full color photosensitive material in a single batch and the material produced thereby is disclosed. The method includes dispersing three internal phases, each containing a different color-forming agent in a continuous solution to form an emulsion, and thereafter forming mirocapsule walls around each of the internal phases. The invention is particularly characterized by the use of an agent to control intermixing of the internal phases.

Abstract: A description is given of a process for microencapsulating hydrophobic oils with color reactants of color reaction sytems dissolved therein, a cationized melamine/formaldehyde precondensate being precipitated in ultra-fine suspension from its acid aqueous solution, accompanied by vigorous stirring and by modifying the solubility conditions, said suspension is mixed under vigorous stirring with a hydrophobic oil containing the color reactants in dissolved form, the oil-in-water dispersion obtained is adjusted acid and an aqueous solution of a water-soluble, nonionic melamine/formaldehyde precondensate is added, accompanied by stirring, for forming the microcapsule envelope.

Abstract: A light-sensitive microcapsule comprises a core material containing a silver halide and an ethylenically unsaturated polymerizable compound and a shell containing a melamine derivative-aldehyde resin which encloses the core material. The melamine derivative-aldehyde resin forming the shell is produced from formaldehyde and a melamine compound which contains a specifically selected melamine derivative in an amount of at least 10 wt. %. A light-sensitive material prepared using the microcapsule is also disclosed.

Abstract: A recording sheet which comprises a substrate having a layer of a metal on the surface thereof and a layer of microcapsules, said microcapsules being bonded to one another by means of a crosslinking agent which has reactively interacted with reactive moieties on the surface of said microcapsules, to improve the adhesion of said microcapsule layer to said metal layer.

Abstract: A light-sensitive material comprising a light-sensitive layer containing silver halide, a reducing agent, a polymerizable compound and a leuco dye provided on a support, characterized in that the leuco dye has the following formula (I): ##STR1## in which each of R.sup.1 and R.sup.2 independently is hydrogen, an alkyl group, a cycloalkyl group, an aralkyl group or an aryl group, or R.sup.1 and R.sup.2 together with the neighboring nitrogen atom form a 5- or 6-membered ring; X is hydrogen, a halogen atom, an alkyl group, an alkoxy group, --NHCOR.sup.3 or --OCOR.sup.4 (each of R.sup.3 and R.sup.4 is an alkyl group or an aryl group) or --NR.sup.5 R.sup.6 (R.sup.5 and R.sup.6 have the same meanings as for R.sup.1 and R.sup.2); Y is an alkyl group or an aralkyl group; Z is hydrogen, an alkyl group or an aryl group; and each of R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, X, Y, Z and the benzene ring A may have one or more substituent groups.

Abstract: Pressure sensitive carbonless transfer sheets are made capable of producing clear images by light impact marking means in multi-part carbonless forms packs containing at least six of the sheets, such as 8-12 sheets, by coating a chromogenic material onto a paper sheet characterized by a basis weight of 9-12 lbs of a ream of 500 sheets of paper each having dimensions of 17 by 22 inches, a thickness of 40-50 microns, a Gurley porosity of 400-4000 seconds, and a Bendtsen smoothness of 90-260 ml/min on the wire side and 60-280 ml/min on the felt side. Bar codes are also transferrable with good scannability through forms packs containing three or more sheets.

Abstract: An improved in-situ polymerization method is provided for easily producing a good slurry of strong, dense, water-resistant and anti-hygroscopic microcapsules made of an amino resin of either of melamine-formaldehyde series or the ureaformaldehyde series, in a high concentration of microcapsules, and a low viscosity.

Abstract: A heat-sensitive recording material is disclosed. The material comprises a support having provided on the same surface thereof microcapsules containing a basic colorless dye and an organic solvent, and a developer capable of reacting with the basic colorless dye to develop a color, the capsule walls of said microcapsules being impermeable to either of the basic colorless dye and the developer at room temperature but becoming permeable to the colorless dye and/or the developer upon application of heat. The organic solvent is a compound containing at least two benzene rings in the molecule thereof with a total number of at least one hetero atom selected from nitrogen, sulfur, oxygen and phosphorus atoms, if any, being less than 1/10 a total number of carbon atoms of the organic solvent. The material is excellent in preservability before and after recording and is excellent in heat-developability.

Abstract: Methods for preventing or reducing the likelihood of successful alteration of information printed on a document, wherein a detectable substance is released from ruptured microcapsules onto the document in image areas. The substance penetrates through the document to form a confirming image on the reverse surface. Another detectable substance of lesser penetrating ability simultaneously may be released onto the document in the image areas. Spreading of the first substance outside the boundaries of the image area created by the second substance may produce a halo effect around the image area. Documents as treated by the methods are disclosed, as well as articles comprising a document to be treated in contact with a sheet coated with the detectable substance. The first substance is microencapsulated, the second substance may or may not be microencapsulated.

Abstract: A non-aqueous printing ink composition containing a microcapsule and a microencapsulated ink composition characterized in that the microcapsule has a capsule wall comprising melamine-formaldehyde resin and has an average particle size of 1.8 to 3.5.mu..

Abstract: A method for producing images utilizing photohardenable microcapsules and a reversal phenomenon is disclosed. The microcapsules contain a color former, a photopolymerizable or cross-linkable monomer and a photoinitiator. A substrate containing the microcapsules is image-wise exposed to a high intensity, short term exposure of actinic radiation to cause reversal in the exposed microcapsules. The substrate is then given an overall exposure to polymerize the microcapsules which had not completely reversed. The microcapsules are then ruptured in the presence of a developer material to produce a negative image. In addition the inventive method may be used to produce copies by a "direct-write" copying process.

Abstract: A sheet is provided which upon abrasion of one surface will reveal a preprinted message without removal of a cover layer.

Abstract: A no-carbon pressure-sensitive copying paper obtained by coating a composition containing an alkali thickening type copolymer latex as a binder on a support is excellent in color forming properties, resistance to smudge and high concentration coating suitability.

Abstract: An organic phase which comprises a water-insoluble material to be encapsulated, a capsule-forming or matrix-forming monomer or prepolymer and, should this be desirable, a solvent, is dispersed in droplet form in an aqueous phase. The capsule-forming or matrix-forming monomer or prepolymer forms a sheath around the material to be encapsulated. As a capsule-forming or matrix-forming monomer, an organosilicon compound of the general formula ##STR1## is used, wherein R.sup.1 is a linear or branched, saturated or unsaturated, n-functional hydrocarbon moiety, which may be interrupted by groups containing oxygen, nitrogen or sulfur; R.sup.2 and R.sup.3 are the same or different and represent a hydrocarbon moiety with 1 to 6 carbon atoms or X; X is a hydroxyl group or a hydrolyzable group and n is a whole number greater than or equal to 1, with the proviso that, when n=1, R.sup.1 has at least 12 carbon atoms and R.sup.2 and R.sup.3 represent X or a prepolymer hereof.

Abstract: A temperature history indicator and its manufacturing method wherein the indicators are formed as chips, labels, tags or the like and accompanied with those goods or their packings which must be stored at a certain temperature or lower and when their storage temperature rises higher than the certain temperature over a not-permissible time period, this fact can be visibly shown by development or change of color caused by chemical matters in the indicator, characterized in that when temperature rises higher than a certain value, a hydrophobic organic compound enclosed in microcapsules melts and diffuses causing a dye-precursor and a color developer, which are prepared independently of the compound, to be contacted with each other to irreversibly achieve color development or change, that this color development or change system is rendered operative when the temperature rise continues to exceed a permissible time period, and that when the tops of the color development or change systems are coated with a transpare

Abstract: A method for forming a full color photosensitive material in a single batch and the material produced thereby is disclosed. The method includes dispersing three internal phases, each containing a different color-forming agent in a continuous solution to form an emulsion, and thereafter forming microcapsule walls around each of the internal phases. The invention is particularly characterized by the use of an agent to control intermixing of the internal phases.

Abstract: Pressure sensitive carbonless transfer sheets are made capable of producing clear images by light impact marking means in multi-part carbonless forms packs containing at least six of the sheets, such as 8-12 sheets, by coating a chromogenic material onto a paper sheet characterized by a basis weight of 9-11 lbs, a thickness of 40-50 microns, a Gurley porosity of 400-4000 seconds, and a Bendtsen smoothness of 120-260 ml/min on the wire side and 100-280 ml/min on the felt side. Bar codes are also transferrable with good scannability through forms packs containing three or more of the sheets.

Abstract: A photosensitive material comprising a support having a layer of microcapsules on the surface thereof, said microcapsules containing a color precursor and a photohardenable or photosoftenable composition, and said support being a highly reflective, non-difuse polymeric film or coated paperstock.

Abstract: A carbonless copy paper for imaging via electrostatic copiers comprising a paper stock having a basis weight greater than about 18 pounds per ream and containing on at least a portion of a surface thereof a stilt particle-free composition comprising microcapsules, at least 50 volume percent thereof having a size no greater than about 12 microns and at least 95 percent by volume thereof having a size no greater than about 18 microns.

Abstract: Microcapsules having hard, thick walls are formed by dispersing an oily solution containing a crosslinking agent in an aqueous solution, and forming a polysalt in the aqueous solution, the polysalt including a high molecular weight polyanion and a low molecular weight polycationic polyamine having a functionality of at least three. The polyanion is preferably casein. The microcapsules may be used in a CB ink for preparing carbonless copy paper.

Abstract: Microcapsules having melamine-formaldehyde precondensate capsule walls are prepared in a continuous process in aqueous dispersion starting from an appropriate melamine-formaldehyde precondensate in the presence of a water-soluble high polymer which contains strongly acid groups by further condensing the water-soluble precondensate until the solution starts to become turbid, then dispersing the material to be encapsulated in the resulting dispersion in the presence of the water-soluble high polymer which contains strongly acid groups and subsequently condensing the wall material of the resulting microcapsules to completion.