Abstract: A recording material comprises a layer which contains a leuco dye on a support. The leuco dye has the formula (I): ##STR1## in which each of R.sup.1 and R.sup.2 independently is an alkyl group, a cycloalky group or an aryl group, or R.sup.1 and R.sup.2 may form, together with the neighboring nitrogen atom, a heterocyclic ring; R.sup.3 is a halogen atom, an alkyl group, an aryl group, an alkoxy group or an aryloxy group; R.sup.4 is an aryl group or a heterocyclic group; R.sup.5 is a halogen atom, an acyloxy group, an acyl group, carbamoyl, sulfamoyl, an alkylsulfonylamino group, an arylsulfonylamino group, an acylamino group, amino, hydroxyl, nitro, cyano, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkysulfonyl group or an arylsulfonyl group; each of R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 may have one or more substituent groups; m is 0 or 1; n is 0, 1, 2, 3, 4 or 5; and when n is 2, 3, 4 or 5, the groups represented by R.sup.

Abstract: Disclosed is an ultraviolet curable/ultraviolet protective overcoating for application to heat and/or pressure sensitive record materials known to undergo degratory effects when exposed to ultraviolet radiation within a known "photodegratory" wavelength range. The overcoatings of the invention generally contain a first additive which promotes curing of the overcoating by UV radiation outside of the "photodegratory" range and a second additive which remains present within the cured overcoat and serves to absorb or otherwise prevent transmission of UV radiation within the "photodegratory" range. Additionally, the overcoatings of the invention may contain a third additive capable of acting as a free radical scavenger within the cured overcoating, thereby preventing or minimizing certain degratory effects of free radicals within or adjacent to the cured overcoating.

Abstract: A novel thermosensitive recording sheet having a coated film containing a color-forming lactone compound, an acidic substance and a sensitizer, said sensitizer being an o-hydroxy aromatic acid ester represented by formula ##STR1## wherein R.sub.1 denotes an alkylene group, a cycloalkylene group, an oxyalkylene group, a thioalkylene group, a phenylene group, a xylylene group or a napthylene group, R.sub.2 denotes ##STR2##R.sub.3 denotes ##STR3## in which X denotes a hydroxy group or a hydrogen atom, provided a benzene ring and a naphthalene ring in R.sub.1, R.sub.2 and R.sub.3 may be substituted by a lower alkyl group, a nitro group or a halogen atom.

Abstract: A heat-sensitive recording material is disclosed. The material comprises a support having provided thereon a heat-sensitive color forming layer containing an electron donating dye precursor and an electron accepting compound, said heat-sensitive color forming layer containing at least one compound selected from an aromatic polyether and an aromatic polyester, and an aromatic ether.

Abstract: A recording material wherein a color forming system comprising (a) a fluorene compound as a dye precursor, (b) a color developer, (c) an isocyanate compound, and (d) an imino compound, gives a developed color image having an absorption at near infrared portion and excellent image storability.

Abstract: In accordance with the present invention an ink formulation capable of monitoring steam, dry heat and ethylene oxide gas sterilization processes is disclosed. The formulation comprises selected substituted pyridenes, quinolines or isoquinolines as the active compound in combination with a nitrocellulose solution and a solvent.

Abstract: Coloring phthalide compounds having general formula [I], a method of producing the phthalide compounds and a recording material comprising as a coloring component any of the coloring phthalide compounds are disclosed, ##STR1## wherein R.sup.1 and R.sup.2 each represent a straight chain or branched alkyl group having 1 to 6 carbon atoms, a cycloalkyl group, or a benzyl group, and R.sup.1 and R.sup.2 in combination may form a ring; R.sup.3 represents an alkyl group having 1 to 4 carbon atoms; R.sup.4 represents a dialkylamino group having 1 to 6 carbon atoms, a cyclic amino group or halogen, l is an integer of 0 to 4; A represents ##STR2## wherein R.sup.5 and R.sup.6 each represent a straight chain or branched alkyl group having 1 to 8 carbon atoms, a cycloalkyl group, or a benzyl group, R.sup.5 and R.sup.6 in combination may form a ring; and B is the same as A, or represents a phenyl group which may have a substituent.

Abstract: Multiple sheets are simultaneously thermally printed, the sheet having coatings located to enable same.

Abstract: There is disclosed a thermosensitive recording material improved in thermal response and image retention which comprises a support and, provided thereon, a thermosensitive recording layer containing a generally colorless or slightly colored dye precursor and a developer which, upon being heated, reacts with said dye precursor to develop color, wherein said thermosensitive recording layer contains as sensitizer a compound selected from a group consisting of p-benzylbiphenyl, diaryl esters of adipic acid, ##STR1## (wherein R represents a substituted or unsubstituted aralkyl group, ##STR2## (wherein R.sub.1 and R.sub.2 each represents an alkyl, aralkyl, or aryl group), and ##STR3## and said developer is bis(3-allyl-4-hydroxyphenyl)sulfone.

Abstract: The disclosed is a cleaning sheet comprising second microcapsules, which encapsulate a solvent dissolvable of a photo-curable material, so that any radiation curable material sticking to a surface of a pressure roller member of a transfer imaging system will be efficiently cleaned away, thereby maintaining a constantly smooth surface of the pressure member which can then apply pressure onto the photo-pressure sensitive sheet uniformly, resulting in a unblemished transmittance of the original image.

Abstract: Bis{[1-(2-A-2-B)ethenyl]}[2-R.sup.2 -4-X-phenyl-or 1-(2-R.sup.2 -4-X-phenyl) ethenyl]methanes useful as color formers, particularly in transfer imaging, pressure sensitive and thermal-responsive carbonless duplicating systems, are prepared by the interaction of two molecular proportions of the corresponding 1-A-1-B-ethene with the appropriate 2-R.sup.2 -4-X-phenyl-(CH.dbd.CH).sub.n --CHO presence of an acidic catalyst.

Abstract: A color developer sheet which brings about color development by contact with a substantially colorless electron-donating color former, where said sheet contains an organometallic compound represented by the following general formula (I), (II) or (III) to enhance light resistance and stability of the color product obtained by the color development: ##STR1## wherein M represents a nickel atom, a copper atom, a cobalt atom, or a zinc atom; X.sub.1 and X.sub.2 each represents an oxygen atom, a sulfur atom, or --NR.sub.5 --, in which R.sub.5 represents a hydrogen atom, an alkyl group, an aryl group, or a hydroxyl group; X.sub.3 represents a hydroxyl group, or a mercapto group; Y represents an oxygen atom, a sulfur atom, or --CHR.sub.6, in which R.sub.6 represents a hydrogen atom, an alkyl group, or an aryl group; R.sub.1, R.sub.2, R.sub.3 and R.sub.

Abstract: A heat-sensitive recording material has a support and a color-developing layer which comprises a particular sulfone as an organic color-developing agent and a particular fluorene-type leuco dyestuff as a colorless basic chromogenic dyestuff. This heat-sensitive recording material is superior in light resistance, weather resistance, oil resistance and optical readability in the near infrared region.

Abstract: A new reversible heat sensitive recording composition for erasable recording is disclosed which is used as a recording or marking material that is capable of erasure at a specific temperature so that coloring or decoloring can be controlled to occur at desired temperature ranges. This range or the hysteresis value of the composition is determined by the .DELTA.T value of the contained ester compound. In addition, the compostion can provide a wide variety of hues and can readily be prepared. The marking or recording drawn in this composition can be maintained at room temperature or less.

Abstract: A recording material containing the combination of at least one electron-donating colorless dye containing a p-substituted aminophenylindolyl azaphthalide and at least one electron-accepting compound containing an organic acid having at least one phenolic hydroxyl group. The material provides colored images having improved stability.

Abstract: A pressure-sensitive recording material is disclosed, having microcapsules containing a triphenylmethane leuco-dye dissolved in a solvent composed at least 80% of plant, animal or paraffin oils, the microcapsule walls being formed of a wall material which is water-soluble or water-dispersible before the formation of the microcapsules.

Abstract: This invention discloses a manufacturing method of a heat sensitive material having a transparent heat sensitive layer comprised of controlling transparency of heat sensitive layer by coating a composition containing an emulsified dispersion prepared by dispersing a color developer dissolved into an organic solvent slightly soluble or insoluble in water and microcapsules containing at least a colorless or light colored electron donating dye precursor (core material) and then drying the coat, in which a refractive index of the core material and that of an oil phase of the color developer dispersion are properly adjusted. When providing a transparent heat sensitive layer obtained by the above method on a printed support, a printed matter can be seen through the heat sensitive layer.

Abstract: A recording material is disclosed, which comprises a support having thereon a recording layer containing an at least one electron-donating colorless dye and at least one electron-accepting compound, wherein said electron-donating colorless dye is a copolymer of at least one polymerizable colorless dye monomer and at least one comonomer. The recording material has improved color forming property, shelf life, and stability of colored images.

Abstract: A heat-sensitive recording material is disclosed. The material comprises a neutral paper support having provided on at least one surface thereof a heat-sensitive color forming layer containing a fluoran derivative having an arylamino group at the 2-position and an amine residual group at the 6-position, an electron accepting compound, a hindered phenol derivative and a heat-fusible compound represented by formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6, which may be the same or different, each represents a hydrogen atom, an alkyl group, an alkoxy group, a phenyl group or a halogen atom, X represents an oxygen atom or a sulfur atom, and Z represents a divalent group.

Abstract: A thermosensitive recording material having a fluorescent color comprising a support, a thermosensitive recording layer formed on one side of the support, the thermosensitive recording layer comprising (i) a thermosensitive recording system capable of producing color upon application of heat thereto and (ii) a colored fluorescent dye composition by which the recording material has high recognition ability; and optionally an adhesive layer formed on the opposite side of the support.

Abstract: A heat-sensitive recording material containing a special sensitizer in a heat-sensitive recording layer is excellent in thermal response properties and sensitivity.

Abstract: The present invention provides a developer sheet composed of a sheet-like molded form of a mixture of a developer and a dye-adsorbing inorganic substance and a substrate integrated by adhesion. According to the present invention, there is provided a developer sheet improved in color coupling performance, outstanding in stability (to water, heat, light, plasticizer etc.) and manufacturable with a high efficiency.

Abstract: A heat-sensitive recording material has a support and a color-developing layer which comprises both as a colorless basic chromogenic dye at least one of a particular fluorane-type leuco dye and a particular divinyl compound and as a stabilizer a particular halogen-substituted zinc benzoate derivative.This heat-sensitive recording material is superior in light resistance, weather resistance, oil resistance and optical readability in the near infrared region.

Abstract: A developer composition comprising first and second developer materials, said first developer material being a finely divided thermoplastic phenolic resin and said second developer material being a finely divided thermoplastic vinylic or acrylic resin containing pendant developer moieties, said first and second developer materials being sufficiently compatible that upon heating they coalesce to form a non-tackey, and scratch resistant film.

Abstract: A heat- and light-sensitive recording material has a substrate and a color-forming layer which comprises a particular fluoran-type leuco dye.This heat- and light-sensitive recording material provides a clear image a superior contamination-resistance and an excellent readability in visible and near infrared range.

Abstract: A heat-sensitive recording material has a substrate and a color-developing layer which comprises a near infrared-absorbing fluorantype leuco dye.This heat-sensitive recording material provides a superior optical readability in near infrared region.

Abstract: A pressure-sensitive recording medium producing a colored image utilizing the reaction between a substantially colorless electron donating dye precursor and an electron accepting developer is disclosed. This recording sheet is characterized in that the electron accepting developer layer contains an aromatic carboxylic acid metal salt and the electron donating dye precursor layer contains (a) an indolylazaphthalide compound and (b) Crystal Violet lactone.

Abstract: A negative type heatsensitive recording material which can realize high contrast image suitable to overhead projector, comprising on a support a heatsensitive layer prepared by coating a composition containing an emulsified dispersion, which is obtained by dissolving a colorless or light colored electron donating dye precursor and a color developer in an organic solvent slightly soluble or insoluble in water then subjecting the resulting solution to an emulsifying dispersion treatment, and decolorizercontaining microcapsules.

Abstract: A thermosensitive recording sheet having a coated film containing a color-forming lactone compound, an acidic substance and a sensitizer, said sensitizer being a sulfur-containing dibasic acid ester represented by formula (I) ##STR1## wherein n is an integer of 1 to 3, m is an integer of 1 or 2, R.sup.1 and R.sup.2 may be the same or different and each denotes an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group, an aryl group, --C.sub.l H.sub.2l --Ar or --C.sub.l H.sub.2l --CO--AR in which l is an integer of 1 to 8 and Ar denotes an aryl group, provided the alkyl group having 1 to 20 carbon atoms may be substituted by a halogen atom, and the cycloalkyl group, the aryl group and Ar of --C.sub.l H.sub.2l --Ar or --C.sub.l H.sub.

Abstract: A desensitizer composition consisting essentially of a 2,2,6,6-tetramethylpyperidine compound as a desensitizer and additives comprising a natural or synthetic high-molecular weight compound and a pigment, a color developer sheet containing the desensitizer composition and a process for forming an image using the color developer sheet. The composition exhibits superior desensitizing effects, especially when used with fluoran color formers.

Abstract: A heat sensitive recording material which comprises a support having thereon a heat sensitive layer containing at least color former-contained microcapsules and a color developer, with the heat sensitive layer being formed using a colorless or light colored precursor of a basic dye as the color former, and according to a process which comprises preparing a coating composition by mixing the color former-contained microcapsules with an emulsified dispersion prepared by dissolving at least the color developer into an organic solvent which is slightly soluble or insoluble in water, and then dispersing the solution in an emulsified condition, coating the resulting composition on the support, and then drying the coat, whereby the heat sensitive layer comes to acquire both excellent transparency and high sensitivity to heat.

Abstract: A recording material comprises a layer containing 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 an alkyl group, a cycloalkyl group or an aralkyl group; each of R.sup.3 and R.sup.4 independently is a halogen atom, an alkyl group, a cycloalkyl group, an aralkyl group, alkoxy group or an acylamino group; R.sup.5 is an alkyl group, a cycloalkyl group, an aralkyl group, an alkoxy group, an aryloxy group, a dialkylamino group, an alkoxycarbonyl group, an aryloxycarbony group, a dialkylcarbamoyl group, an aryl group or a heterocyclic group; R.sup.

Abstract: A heat responsive recording element having a recording layer containing a colorless di- or tri-aryl methane compound having a closed ring moiety incorporating the meso carbon atom and containing a nitrogen atom directly bonded to the meso carbon. The nitrogen atom is also bonded to a heterocyclic or carbocyclic ring substituted with an alkylating group. Upon heating the recording layer imagewise the alkylating group effects intramolecular alkylation of the nitrogen atom with irreversible breaking of the meso carbon atom-nitrogen atom bond rendering the compound colored in the imagewise heating pattern.

Abstract: A heat-sensitive recording material is disclosed. The material is comprised of a support having thereon a heat-sensitive color forming layer comprising at least one electron-donating colorless dye and at least one electron-accepting compound, wherein the electron-donating colorless dye is a fluorene derivative having at least one substituted amino group and the electron-accepting compound has an acid group and a solubility in ethanol of 10 or less at 25.degree. C.The material exhibits improved color developability, improved preservability before recording, improved image stability, and improved chemical resistance.

Abstract: A heat sensitive recording sheet having a heat sensitive color forming layer wherein a mixture of fluoran compounds of the following formulas I and II is used as a color former; ##STR1## wherein R.sub.1 is a hydrogen atom, an alkyl group having from 1 to 8 carbon atoms, a tetrahydrofurfuryl group, a substituted or unsubstituted phenyl group or a cycloalkyl group, R.sub.2 is a hydrogen atom, a chlorine atom, a fluorine atom, a lower alkyl group, a lower alkoxy group, a lower alkoxyalkyl group, a phenyl group or a benzyl group, and R.sub.3 is a hydrogen atom, a chlorine atom, a fluorine atom, a bromine atom, a lower alkyl group or an acyl group; and ##STR2## wherein each of R.sub.4 and R.sub.5 is a hydrogen atom, an alkyl group having from 1 to 8 carbon atoms, a substituted or unsubstituted phenyl group or a cycloalkyl group, or R.sup.4 and R.sub.5 may, together with the adjacent nitrogen atom, form a ring of the formula ##STR3## each of R.sub.6 and R.sub.

Abstract: A heat-sensitive recording material containing a special sensitizer in a heat-sensitive recording layer formed on a support is excellent in thermal response.

Abstract: Disclosed herein are novel divinyl compounds represented by the formula (I): ##STR1## and a recording-material prepared by utilizing the divinyl compounds. The divinyl compound is in itself almost colorless, extremely stable in the atmosphere and develops rapidly blackish color by a developer. The color image given by the divinyl compound is excellent in light-resistance and moisture-resistance and the letters developed can be read by an optical letter-reading apparatus or a barcord reading apparatus.

Abstract: A recording material is described comprising an electron-donating colorless dye and a molybdic acid derivative as a color developer; the material has excellent color developability and shelf life stability, and enables the production of a developed color image with excellent fastness and chemical resistance.

Abstract: Fluoran compounds are disclosed of formula (I) ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 independently represent hydrogen, halogen, lower alkoxy, C.sub.1 -C.sub.9 -alkyl, C.sub.5 or C.sub.6 -cycloalkyl, benzyl or phenyl, said benzyl or phenyl being optionally substituted by halogen, lower alkyl or lower alkoxy, and further R.sub.1 and R.sub.2 as well as R.sub.3 and R.sub.4 taken together with Ring A, may form a naphthalene ring optionally substituted by halogen, lower alkyl or lower alkoxy, R.sub.5, R.sub.6 and R.sub.7 independently represent halogen, lower alkyl or lower alkoxy, B.sub.1 and B.sub.2 independently represent hydrogen, C.sub.1 -C.sub.8 -alkyl, benzyl or phenyl, said benzyl or phenyl being optionally substituted by halogen, lower alkyl, lower alkoxy, or alkyl-substituted amino, X represents hydrogen atom or --NR.sub.8 R.sub.9 wherein R.sub.8 and R.sub.9 independently represent hydrogen, C.sub.1 -C.sub.8 -alkyl, C.sub.5 or C.sub.

Abstract: A method is provided for rupturing photosensitive microcapsules which form a photosensitive layer on the surface of an imaging sheet which involves abrading the microcapsules such that upon subsequent pressure transfer, the resulting image has significantly greater dynamic range, significantly less midtone mottle and more highlight detail.

Abstract: A pressure-sensitive recording sheet which forms a colored image by the reaction of an electron donating color former with an electron accepting developer, comprising a support having provided thereon a micro-encapsulated electron donating color former and an electron accepting developer is disclosed, wherein one or more layers containing the microencapsulated electron donating color former contains at least one pigment having a pH of 8.5 or more.

Abstract: A solvent for chromogenic dye-precursor material for pressure-sensitive recording paper sheet, comprising 50 to 80% by weight of p-monoisopropylbiphenyl and 50 to 20% by weight of hydrogenated terphenyl, and a pressure-sensitive recording paper sheet prepared by using the solvent.

Abstract: Carbonless copy paper is prepared by placing a first sheet of paper coated on one side with a hydrophilic colloid solution in which are dispersed microcapsules of oil droplets containing a colorless electron donor dye into contact with a second sheet of paper coated with an absorbent and an electron accepting color developer compound. The heat resistance and moisture resistance of the copy paper is substantially improved by adding to the hydrophilic colloid solution a graft copolymer having a backbone of carboxymethyl cellulose or gum arabic and side chains of polyacrylic acid or polymethacrylic acid. The image response time of the second sheet can be improved by adding pectin or sulfated starch to the coating.

Abstract: Disclosed herein is a process for producing a sheet of a color-developer for a pressure-sensitive recording paper, which process comprises the steps of dissolving an organic color-developer in an organic solvent, dispersing the formed solution into water, thereby forming minute liquid droplets with a diameter of 0.01 to 2 .mu.m, removing the solvent in the liquid droplets by heating while taking care not to cause any coalescence of the droplets and also any unstabilization of the emulsion, thereby forming a slurry comprising the minute granules of the color-developer and applying the slurry on a supporting sheet.

Abstract: An improved thermally-responsive record material having improved image retention is disclosed. The invention is an improved thermally-responsive record member, typically a sheet material, bearing a thermally-responsive color-forming composition comprising a chromogenic material, an acidic developer material, and a metal salt of a compound of the formula ##STR1## wherein R.sup.a is selected from --CH.dbd.CH, ##STR2## --(CH.sub.2).sub.4 --, --(CH.sub.2).sub.3 --, --(CH.sub.2).sub.3 --, --CH.sub.2 --CH.dbd.CH--, and --CH.sub.2 --wherein R.sub.1 is selected from hydrogen, halogen, alkyl, oxyalkyl, or NO.sub.2 with the proviso that the alkyl groups are of 1-5 carbons wherein M is a metal selected from Zn, Ca, Sn, Ni, Cu, Al, Co, and Mg.

Abstract: A heat responsive recording element having a recording layer containing a colorless di- or tri- aryl compound having a closed ring moiety incorporating the meso carbon atom and containing a nitrogen atom directly bonded to the meso carbon. The nitrogen atom is also bonded to an arylating group that has a displaceable entity. Upon heating the recording layer imagewise the arylating group effects intramolecular arylation of the nitrogen atom with irreversible breaking of the meso carbon atom-nitrogen atom bond rendering the compound colored in the imagewise heating pattern.

Abstract: Disclosed herein is a heat-sensitive recording material in which a chromogenic dye-procursor comprises:(A) a mixture comprising at least two divinyl phthalide compounds represented by the formula (I): ##STR1## wherein R.sup.1 and R.sup.2 represent respectively alkyl group of 1 to 6 carbon atoms, alkyl group of 1 to 4 carbon atoms having an alkoxy group of 1 to 4 carbon atoms or cycloalkyl group of 5 to 7 carbon atoms, X.sup.1 and X.sup.2 represent respectively hydrogen atom, alkyl group of 1 to 8 carbon atoms, alkoxy group of 1 to 8 carbon atoms, alkoxy group of 1 to 4 carbon atoms having an alkoxy group of 1 to 4 carbon atoms, cycloalkoxy group of 5 to 7 carbon atoms, alkenyloxy group of 3 to 8 carbon atoms, benzyloxy group, substituted benzyloxy group, furfurloxy group, tetrahydrofurfuryloxy group, phenyl group, substituted phenyl group, phenoxy group, substituted phenoxy group, fluorine atom, chlorine atom or bromine atom, m and n represent 0 or integer of 1 to 4, m+n=4 and R.sup.1 and R.sup.

Abstract: Disclosed is a heat and pressure sensitive recording material for recording and duplicating, comprising an up sheet I and a down sheet II, wherein the up sheet I is coated on one surface with a composition A comprising a colorless electron donative organic compound 1 and an acidic organic compound 2 which develops the color of the compound 1 when heat is applied, and is coated on the other side facing the down sheet II with a composition B comprising the compound 1, an encapsulated compound 1' of the compound 1 and a hot metal material 3. The down sheet II is coated on the side facing the up sheet I with a composition C comprising the organic compound 2. The heat and pressure sensitive recording material may further have inserted beween the up sheet I and the down sheet II at least one middle sheet III coated with the composition C on one side and with the composition B on the other side.

Abstract: A recording material comprises a layer containing 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 an alkyl group, an aralkyl group or an aryl group; R.sup.3 is an alkyl group or an aralkyl group; X is ##STR2## and each of R.sup.1, R.sup.2, R.sup.3, X and the benzene rings A, B, C and D may have one or more substituent groups.

Abstract: A recording material comprising an electron-donating colorless dye and an electron-accepting compound, wherein said colorless dye is a dimer of a 3-(4-substituted aminoaryl)-3-(substituted indol-3-yl)phthalide compound. The recording material provides an image exhibiting satisfactory fastness, and particularly fastness to light even when preserved in a transparent polyvinyl chloride film.