Abstract: A sheet set for temperature control comprises: a recording sheet that is provided on one surface of a substrate and has a recording layer incorporating a zinc salt of a salicylic acid derivative as a color acceptor, or a leuco dye; and an adhesive sheet that is provided on one surface of another substrate and has a first adhesive layer incorporating an adhesive, an ester derivative of the formula (1) or (2), and a leuco dye, or a zinc salt of a salicylic acid derivative as a color acceptor.

Abstract: A thermosensitive recording medium has a support, and thermosensitive recording layer formed thereon containing an electron-donating coloring compound, an electron-accepting compound, a binder resin, a liquid resin which is in a liquid state at room temperature, and a plasticizer.

Abstract: An improved thermally-responsive record material useful for bar coding is disclosed comprising a support having provided thereon in substantially contiguous relationship: a substantially colorless dye precursor comprising 2-anilino-3-methyl-6-dibutylaminofluoran; a sensitizer selected from the group consisting of 1,2-diphenoxyethane and 1,2-(4-methylphenoxy)ethane; an acidic developer material comprising bis-(3-allyl-4-hydroxyphenyl)sulfone which upon being heated reacts with said dye precursor to develop color; and a binder material. The improved thermally-responsive record material and bar code of the invention has a high print contrast signal; high dimensional stability in terms of low bar width growth degradation; a high percentage of successful decodes; and high contrast of the bar code with the background. The invention overcomes difficulties in past efforts to bring together a confluence of these characteristics in one coating formulation.

Abstract: The present invention provides a heat sensitive recording material comprising a heat sensitive recording layer formed on a substrate and containing an electron-donating compound and an electron-accepting compound, and a protective layer formed on the recording layer when required, the recording material being characterized in that at least one benzotriazole compound represented by the formula (1) is incorporated into at least one of the heat sensitive recording layer and the protective layer ##STR1## wherein R.sup.1 is C.sub.1.about.4 alkyl, Ar is 1,3-phenylene or 1,4-phenylene.

Abstract: A reversible thermosensitive coloring composition is provided, which contains (a) an electron-donating coloring compound; and (b) an electron-accepting compound, which is an aromatic carboxylic acid compound comprising at least one hydrocarbon group, which induces color formation in the electron-donating coloring compound. The reversible thermosensitive coloring composition reversibly assumes a color-developed state or a decolorized state, in response to at least one of (1) the temperature thereof when heated and (2) the cooling rate of the reversible thermosensitive coloring composition when cooled after the heating thereof. A reversible thermosensitive recording medium using the coloring composition is also provided.

Abstract: A heat sensitive recording material is provided which can be simply prevented from falsification and is excellent in contrast between fixed portion and image portion, and a recording method using it is further provided. Moreover, there is provided a heat sensitive recording material capable of carrying out multicolor recording which is excellent in contrast of the image portions, density of the image portions, and image storage stability.

Abstract: A reversible thermosensitive recording material has a support and a reversible thermosensitive recording layer formed thereon, capable of reversibly assuming at least two different visible states depending upon the temperature thereof, containing an organic low-molecular weight material and a resin composition in which the organic low-molecular weight material is dispersed, the resin composition including a matrix resin, and a dispersion resin which has a glass transition temperature higher than that of the matrix resin, and having resin aggregates which are separately dispersed in the matrix resin in such a manner that the resin aggregates are associated with the matrix resin.

Abstract: A rewritable thermal recording medium comprises a recording material containing a color former and a developer. Recording-erasing of information is performed on the basis of a change in the state of the recording material. The developer is formed of a compound capable of forming a liquid crystal phase and/or represented by general formula (I) given below ##STR1## wherein Ar denotes a noncondensed polycyclic structure consisting of a plurality of ring structures connected to each other via any of a single bond, a vinylene bond and an ethynylene bond or a condensation polycyclic structure, X denotes an ether bond, a thioether bond, an ester bond or an amide bond, Y is an acidic group, R is a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, or a substituted or unsubstituted alkynyl group, m is an integer of 1 to 3, and n is 0 or 1.

Abstract: A footwear has a thermochromic coloring color-memory layer having a large hysteresis on a color-density-to-temperature curve so as to show interchangeability between a first color phase and a second color phase different from the first color phase, and a coloring tool for forming a desired image on the footwear.

Abstract: A heat sensitive recording material wherein a transparent substrate is formed with a heat sensitive recording layer thereon, the heat sensitive recording material being characterized in that the heat sensitive recording layer comprises at least a layer containing a color acceptor and a layer containing a dye, the color acceptor-containing layer being formed by a binder-containing solvent coating method and/or vapor deposition effected with a plasma created, the dye-containing layer being formed by vapor deposition or vapor deposition effected with a plasma created.

Abstract: A reversible thermal recording medium comprises a composition containing a color former, a developer, a reversible material capable of reversibly changing the state of the composition by supplying heat energies with two different values, and, as required, a phase separation controller which permits changing the phase separation speed of the developer at temperatures in the vicinity of the melting point of the phase separation controller, at least 80% by weight of the reversible material being a sterol compound in which the carbon-to-carbon bond between 2- and 3-positions of the stroid skeleton is a single bond, the carbon-to-carbon bond between 3- and 4-positions of the steroid skeleton is a single bond, a hydroxyl group is attached to the carbon atom in at least the 3-position of the steroid skeleton, and a specified chemical structure is bonded at 16- and 17-positions of the stroid skeleton, and the phase separation controller being provided by a low molecular organic material, the maximum carbon chain leng

Abstract: A thermal recording material comprising a support having thereon at least one layer containing an electron donating colorless dye, an electron accepting compound and a diaryloxyalkane derivative represented by the following general formulae (I) to (III)Ar.sup.1 O (CH.sub.2).sub.n OAr.sup.2 (I)Ar.sup.2 O--W--OAr.sup.3 (II)Ar.sup.2 OR--X--ROAr.sup.3 (III)wherein Ar.sup.1 represents an aryl group having at least one substituent selected from the group consisting of an alkoxyl group containing 2 or more carbon atoms, an alkoxycarbonyl group containing 3 or more carbon atoms, an aryloxyl group, an aryloxycarbonyl group, an alkenyl group containing 2 or more carbon atoms, an aryl group containing 4 or more carbon atoms an acyloxyl group containing 2 or more carbon atoms, a fulorine atom, a bromine atom, a carboxyl group, an alkylenedioxy group, a cycloalkyl group and a hydroxyl group; Ar.sup.2 and Ar.sup.

Abstract: A novel thermally responsive record material is disclosed, comprising support having provided thereon in substantially contiguous relationship with electron donating dye precursor, an acidic developer material, a sensitizer, and a binder therefor. The sensitizer comprises at least two components, the first component comprising 2,2-bis(4-hydroxyphenyl)-4-methylpentane and the second component comprising a mixture of dimethyl terephthalate and 1,2-diphenoxyethane, the first component being in a range of weight ratios from 1:2 to 2:1 relative the second component, said second component comprising from 50 to 70% dimethyl terephthalate. The sensitizer is prepared by admixing the first component and the second component and grinding the sensitizer to a particle size of less than 1 micron.

Abstract: A thermosensitive recording material with a high resistance to fogging has a thermosensitive colored image-forming layer formed on a support and includes at least one colorless dye precursor, a color-developing agent and a binder, the dye precursor being contained in a plurality of fine solid composite particles prepared by dissolving a solute including the dye precursor in a solvent which includes a polymerization component including a polyvalent isocyanate compound; emulsifying the resultant solution in an aqueous medium; and subjecting the aqueous emulsion to a polymerization reaction to thereby form the fine solid composite particles in which the dye precursor is solid-dissolved in a solid thermoplastic resin matrix formed from a resultant polyurea or polyurethane polyurea resin.

Abstract: The present invention provides a heat sensitive recording material comprising a substrate and a recording layer thereon incorporating a colorless or light-colored basic dye and a color acceptor, the recording material being characterized in that, the basic dye comprises an indolyldiazaphthalide derivative of the formula (1), and the color acceptor comprises a diphenyl sulfone derivative of the formula (2) and/or a benzanilide derivative of the formula (3) ##STR1## wherein R.sub.1 to R.sub.8 are defined in the specification.

Abstract: A thermal sensitive recording sheet comprising a substrate having thereon a thermal sensitive color developing layer mainly composed of basic leuco dye and an organic color developer, characterized by said thermal sensitive developing layer includes derivatives of amino benzene sulfone amide indicated by general formula (I) as an organic color developer, and includes sulfone amide compound indicated by general formula (II) as a sensitizer by amount of 0.01-2 parts based on 1 part of the color developer indicated by general formula (I). ##STR1## wherein "X" indicates an oxygen or sulfur atom, "Y" indicates a lower alkyl group of carbon number 1-4 or electron attracting group and "m" indicates an integral number from 0 to 4. "R" indicates a non-substituted or a substituted phenyl group, aralkyl group, lower alkyl group of carbon number 1-6, cycloalkyl group of carbon number 3-6, lower alkenyl group of carbon number 2-6 or naphthyl group.

Abstract: A reversible thermosensitive recording material which includes a support, and a thermosensitive layer provided on the support and including, as main ingredients, a resin matrix and an organic low molecular weight substance dispersed in the resin matrix, wherein the transparency of the thermosensitive layer reversibly changes depending on the temperature thereof is characterized in that the rate of change in heating temperature for the initiation of transparentization is 13% or less, the rate of change in transparency is at least 50% or the rate of change in film thickness is at least 2%. By heating the reversible thermosensitive recording material, the formation and erasure of images may be suitably effected.

Abstract: A heat-sensitive recording material, comprising a heat-sensitive recording layer containing at least one acid hydrazide compound represented by the following general formula (I): ##STR1## wherein X.sub.1 and X.sub.2 each independently represent a hydrogen atom, a hydroxyl group, a halogen atom or an alkyl group or alkoxy group having 1 to 10 carbon atoms, A represents --CO-- or --SO.sub.2 --, n is 1 or 2, when n is 1, R.sub.1 represents an alkyl group, an aryl group, a hydroxyaryl group, an alkoxyaryl group, or an alkylaryl group having 1 to 22 carbon atoms and when n is 2, R.sub.1 represents an alkylene group or arylene group having 1 to 18 carbon atoms or a direct bond.

Abstract: A thermosensitive recording medium is disclosed which includes a support, and a thermosensitive color-developing layer formed on the support and containing a leuco dye having a melting point of at least 200.degree. C. and a color developer having a melting point of at least 180.degree..

Abstract: A thermal recording sheet wherein a compound of Formula (I) or (II) is contained in a thermal color developing layer including a basic colorless dye and an organic color developer as main ingredients: ##STR1## (wherein A denotes hydrogen atom, an alkyl group of C.sub.1 to C.sub.4, an alkoxy group of C.sub.1 to C.sub.4, hydroxy group, or nitro group. R.sub.1, R.sub.2, and R.sub.3 are hydrogen atom, an alkyl group of C.sub.1 to C.sub.4, an alkoxy group of C.sub.1 to C.sub.4, hydroxy group, or nitro group. R.sub.1 and R.sub.2 may combine with each other to form an aromatic ring. Y is sulfur or oxygen atom.), ##STR2## (wherein B denotes hydrogen atom, an alkyl group of C.sub.1 to C.sub.4, an alkoxy group of C.sub.1 to C.sub.4, hydroxy group, or nitro group. R.sub.1, R.sub.2, and R.sub.3 are hydrogen atom, an alkyl group of C.sub.1 to C.sub.4, an alkoxy group of C.sub.1 to C.sub.4, hydroxy group, or nitro group. R.sub.1 and R.sub.2 may combine with each other to form an aromatic ring. Y is sulfur or oxygen atom.).

Abstract: The heat-sensitive recording material of the present invention comprises a heat-sensitive recording layer containing at least one resorcylic anilide derivative represented by the following general formula: ##STR1## wherein R.sub.1 represents an alkyl or alkoxy, group having 1 to 4 carbon atoms and R.sub.2 represents a hydrogen atom or an alkyl or alkoxy group having 1 to 4 carbon atoms.

Abstract: A reversible heat-sensitive recording medium comprising a transparent substrate having a reversible heat-sensitive recording layer formed on one surface of the substrate and having a colored layer formed on the other surface of the substrate, wherein the reversible heat-sensitive recording layer contains organic low molecular weight materials and a crosslinked resin matrix.

Abstract: A direct thermal imaging process wherein a non-photosensitive direct thermal recording material is heated dot-wise, and said direct thermal recording material comprises an imaging layer containing uniformly distributed in a film-forming polymeric binder (i) one or more substantially light-insensitive organic silver salts, said silver salt(s) being uniformly in thermal working relationship with (ii) one or more organic reducing agents therefor, however neither including 3,5-dihydroxybenzoic acid as acidic reagent nor di-tert-butyl-p-cresol as a sole reducing agent, characterized in that said imaging layer contains at least one polycarboxylic acid and/or anhydride thereof in a molar percentage of at least 20 with respect to said silver salt(s).

Abstract: A reversible thermosensitive coloring composition is composed of an electron-donor coloring compound; an electron-acceptor compound which is capable of producing a colored material with a regularly aggregated structure in the electron-doner coloring compound at a color development initiation temperature to obtain a color development state, and is capable of crystallizing out of the colored material at a decolorization initiation temperature which is lower than the color development initiation temperature; and an organic compound serving as a decolorization-accelerating agent capable of inducing the destruction of the regularly aggregated structure of the colored material to accelerate the decolorization of the composition. A reversible thermosensitive coloring recording medium is composed of a support and a recording layer formed thereon, which contains the above-mentioned reversible thermosensitive coloring composition.

Abstract: A thermosensitive recording medium comprising a thermosensitive recording layer containing an electron-donating color forming substance, an electron-accepting substance, and a color developability-improving agent is disclosed, said color developability-improving agent being a solid solution composed of two or more compounds containing at least one color developability-improving compound and having a single intrinsic melting point of not less than room temperature, preferably 60.degree. C. or higher. The recording medium exhibits well-balanced performance among color developing sensitivity, static color developability, image stability, and stability before recording.

Abstract: A latent image printing method and apparatus uses a substrate with one main surface having a covering comprising one of a first pair of a color developer and color former dye defining a background color in conjunction with the one main surface, wherein the color developer and the color former dye react when mixed to produce a first spectral response which is visible relative to the background color and a continuous coating over the covering which is non-porous with respect to the other of the pair and solvent-resistant to the other of the pair. The coating above selected portions of the covering corresponding to a desired latent image is removed.

Abstract: A thermosensitive recording material having a high thermosensitivity and useful for recording thereon colored images having high storage persistency, comprises a thermosensitive colored image-forming layer formed on a surface of a substrate sheet and comprising a colorless dye precursor; a color-developing aromatic compound having, per molecule thereof, at least one arylsulfonylureido group of the formula (I): ##STR1## wherein R.sup.1 =aromatic group unsubstituted or substituted with at least one of lower alkyl and lower alkoxyl group and hologen atoms; a sensitizing aromatic amide compound of the formula (II): ##STR2## wherein Ar.sup.1, Ar.sup.2 =non-substituted phenyl or naphthyl group or substituted phenyl or naphthyl group with 1 to 3 substituent selected from aryl, aryloxy, aralkyl, alkyl, alkoxyl, trihalogenomethyl, nitro and alkylamino groups and halogen atoms; and a binder.

Abstract: In a thermal recording sheet including an intermediate layer, and a thermal color developing layer containing a leuco dye type chromogenic component containing a leuco dye and an organic color developer as main ingredients and a metal chelate type chromogenic component containing an electron acceptor and an electron donor as main ingredients, stacked on a substrate, the intermediate layer contains a pigment having an oil absorption of 100 ml/100 g or less measured according to JIS K 5101, and the thermal color developing layer contains at least one of compounds of Formula (I) and Formula (II) as an organic color developer, a metal double salt of higher fatty acid having 16 to 35 carbon atoms as an electron acceptor, and a polyhydric hydroxy aromatic compound of Formula (III) as an electron donor, whereby providing a thermal recording sheet which is superior in dynamic sensitivity, background color, image stability such as oil resistance and plasticizer resistance, and print adaptability: ##STR1## wherein R is

Abstract: A thermosensitive recording material capable of being imagewise colored when heated, having a support, and a thermosensitive recording layer formed thereon which contains an N-substituted indole or an aromatic polyhydroxy compound, a carbonyl compound, and an acid material.

Abstract: A thermosensitive recording material for recording thereon clear colored images having an excellent storage persistency over a long time, comprises a thermosensitive colored image-forming layer formed on a substrate and comprising a colorless dye precursor, a binder and a color developing agent comprising at least one compound having at least one group of the formula (I): ##STR1## wherein R = unsubstituted aromatic group or substituted aromatic group having at least one substituent selected from alkyl, alkoxyl and halogen, and the thermosensitive colored image-forming layer further comprises an additive comprising at least one member selected from the compounds of the formulae (II) and (III): ##STR2## wherein R.sup.1, R.sup.2, R.sup.3 = alkyl, alkoxyl, aralkyl, aryl, aryloxy, nitro, acetylamino, acetoacetylamino, halogen or hydrogen; and Ar.sub.1, Ar.sub.

Abstract: New thermoreactive recording materials contain a mixture containing at least one specifically modified bisphenol carboxylic acid and at least one basic compound. They are distinguished by good stabilization of the color even upon extended storage, good light stabilities and excellent stabilities to water, plasticizers, greases and ingredients of text-marking pens.

Abstract: A reversible thermosensitive recording medium includes a reversible thermosensitive recording layer which is composed of a matrix resin and an organic low-molecular material which is dispersed in the matrix resin, the transparency of the reversible thermosensitive recording layer being reversibly changeable depending upon the temperature of the reversible thermosensitive recording layer, wherein the reversible thermosensitive recording layer has a softening initiation temperature T.sub.A, the organic low-molecular-weight material has a higher crystallization temperature T.sub.B1 which is 80.degree. C. or more and a lower crystallization temperature T.sub.B2, the softening initiation temperature T.sub.A is between the higher crystallization temperature T.sub.B1 and the lower crystallization temperature T.sub.B2, and the higher crystallization temperature T.sub.B1 and the lower crystallization temperature T.sub.B2 satisfies the relationship of T.sub.B1 -T.sub.B2 .gtoreq.40.degree. C.

Abstract: The present invention provides a magnetic recording sheet which is excellent in its production operability, magnetic recording characteristics and visible information recording characteristics. The magnetic recording sheet comprises a substrate, a magnetic recording layer which comprises a binder having a gel content of 5-75% and ferromagnetic powders and is provided on one side of the substrate, and a visible information recording layer which comprises at least one binder selected from the group consisting of a synthetic binder and a natural binder is and provided on another side of the substrate.

Abstract: A reversible thermosensitive coloring composition containing a coloring agent, a color developer and a guanidine derivative, the coloring composition capable of assuming a color development state when heated at a predetermined color development temperature at which the coloring composition is fused, and capable of assuming a decolorization state when heated at a predetermined temperature lower than the color development temperature. A reversible thermosensitive recording medium is also disclosed which is composed of a support and a thermosensitive recording layer formed thereon, containing the above-mentioned reversible thermosensitive coloring composition.

Abstract: The present invention provides a heat sensitive recording material comprising a recording layer formed on a substrate and containing a colorless or light-colored basic dye and a color acceptor, the material being characterized in that the basic dye is 3-diethylamino-7-[m-(trifluoromethyl)phenylamino]fluoran and/or 3-di-n-pentylamino-6-methyl-7-phenylaminofluoran, the color acceptor being 4,4'-dihydroxydiphenylsulfone.

Abstract: A heat-sensitive recording material comprises a heat-sensitive color forming layer which is formed on a supporter and contains a colorless or light color leuco dyestuff as a color forming substance, a developer which develops color of the leuco dyestuff by reaction with it when heated and a sensitizer. The developer is 2,4'-dihydroxydiphenylsulfone having purity of 97 weight % or more and prepared by washing and drying crystal which is obtained by dissolving crude 2,4'-dihydroxydiphenylsulfone in an alcohol having 1 to 4 carbon atoms or in a mixture of an alcohol having 1 to 4 carbon atoms and water by heating and then cooling the solution or partially removing the solvent from the solution by distillation. The heat-sensitive recording material has excellent properties, such as reduced fog and excellent image preservation (weatherability).

Abstract: An image forming method, comprises the steps of, using an image forming medium containing a heat-diffusible coloring matter, a polymerizable polymer precursor and a polymerization initiator; causing said polymerizable polymer precursor of said image forming medium to selectively polymerize to form a latent image comprised of a polymerized area and an unpolymerized area; andheating said image forming medium on which said latent image has been formed and which is laid overlapping on an image receiving medium, so as to satisfy the following formula (A):Tg.sub.1 .ltoreq.Ttrans.ltoreq.Tg.sub.2 (A)wherein Ttrans represents a temperature of said image forming medium, Tg.sub.1 represents a glass transition point of said unpolymerized area, and Tg.sub.

Abstract: Temperature indicating compositions of dispersions in an aqueous binder of a color changing electron donating compound having a melting point greater than about 300.degree. F. and a polymeric electron accepting resin reactive with the electron donating compound to produce a visible and permanent color change and having a T.sub.g and non-volatility effective to provide a color change to coatings containing the composition upon exposure to a predetermined heat history. Temperature indicating materials are also disclosed containing a support coated on at least one surface thereof with the temperature indicating composition to the present invention.

Abstract: A thermal recording sheet having a thermal color developing layer containing a color developer and a colorless or pale colored basic chromogenic dye, which further contains a stabilizer of Formula (I) and a sensitizer of Formula (II) or Formula (III), thereby obtaining a high sensitivity and improved image stability: ##STR1## wherein A indicates ##STR2## R.sup.1 and R.sup.2 individually indicate hydrogen or methyl; .alpha. is 0 or an integer from 1 to 5; .beta. and .gamma.

Abstract: The invention provides a recording material inhibited from alteration which comprises a substrate, an undercoat layer containing a white or light colored inorganic fluorescent pigment having an emission maximum wavelength of 400-700 nm and provided on one side of the substrate, and a recording layer provided on said undercoat layer. The recording layer may be a heat-sensitive layer or a pressure-sensitive layer. A magnetic recording layer comprising ferromagnetic powders may be provided on another side of the substrate.

Abstract: A thermosensitive recording material composed of a support, and a thermosensitive recording layer formed on the support, containing a leuco dye, a color developer capable of inducing color formation in the leuco dye upon application of heat thereto, and a thermofusible material including p'-methylphenyl p-chlorobenzoate serving as a thermosensitivity-improving agent.

Abstract: A rewritable bar code display medium is disclosed, which is composed of a support and a reversible thermosensitive recording layer for reversibly forming bar codes therein formed on the support, which reversible thermosensitive recording layer varies in transparency with change in temperature, and an image display method using the rewritable bar code display medium, and an apparatus for implementing the image display method are also disclosed.

Abstract: The invention provides a heat-sensitive recording medium comprising (a) a support and (b) a heat-sensitive recording layer formed on the support and comprising a colorless or pale-colored basic dye and a color developing material capable of causing color development upon contact with the dye by heating, which medium is characterized in that the heat-sensitive recording layer contains at least one phosphate compound selected from the group consisting of 2,2'-methylenebis(4,6-di-tert-butylphenyl) phosphate of the general formula (1) shown below and alkali metal, ammonium and polyvalent metal salts thereof: ##STR1## wherein R represents a tert-butyl group.

Abstract: A reversible thermosensitive recording material composed of a support, an undercoat layer formed on the support, and a reversible thermosensitive recording layer formed on the undercoat layer, capable of reversibly assuming a transparent state and a white opaque state depending on the temperature thereof, the undercoat layer having at least one colored portion and at least one light reflecting portion.

Abstract: The reversible heat-sensitive recording medium having a heat-sensitive recording layer capable of reversibly changing the transparency thereof with organic low molecular substances dispersed in an organic macromolecular resin provided on a support is characterized by using at least one long chain alkyl-containing compound having a melting point of 50.degree.-100.degree. C. and at least one saturated aliphatic bisamide having a melting point of not less than 110.degree. C. as the organic low molecular substance in a ratio of 98:2 to 80:20. A plasticizer may be contained in the organic macromolecular resin in a ratio of 1 to 10% by weight, based on the total solid of the heat-sensitive recording layer.

Abstract: An image forming medium comprising an image forming layer comprising at least a heat-diffusible coloring matter, a polymerizable binder and a polymerization initiator, wherein the polymerizable binder has a film-forming property and contains three or more polymerizing functional groups per one molecule.

Abstract: An information memory and display medium comprising: (a) a support, (b) a magnetic recording layer formed on the support, (c) a thermosensitive recording layer formed on the magnetic recording layer, which comprises (i) a light reflection layer formed on the magnetic recording layer, and (ii) a reversible thermosensitive recording layer formed on the light reflection layer, comprising a matrix resin, and one or more organic low-molecular-weight compounds dispersed in the matrix resin, with the transparency thereof being reversibly changeable between a transparent state and an opaque state depending upon the temperature thereof, thereby capable of yielding thermally erasable images. The thermosensitive recording layer may further comprise a smoothing layer between the magnetic recording layer and the light reflection layer, and/or an overcoat layer on the reversible thermosensitive recording layer.

Abstract: A thermal transfer ribbon has a substrate, an undercoating which contains thermal reactive materials and leuco dyes, and a thermal transfer coating applied on the undercoating and which contains a mixture of a wax emulsion and a sensible material, the undercoating assisting the transfer of color images of an improved intensity and sharpness to a receiving medium upon the application of heat to the ribbon. The invention also covers incorporation of the leuco dye and a reactant in the functional coating to intensify the transferred image, with or without the presence of sensible materials such as iron oxide or fluroescent dye, to improve the sharpness and the scratch and smear resistance of the transferred image. An alternative to the two coatings is a single coating which includes pigments with sensing characteristics, thermal reactive material, and transfer agents to obtain an improved intensity image.

Abstract: A reversible thermosensitive recording material is disclosed, which comprises (i) a reversible thermosensitive recording layer which comprises as the main components a matrix resin and an organic low-molecular-weight material dispersed in the matrix resin, and (ii) a light reflection layer made of a metal thin film, which is preferably surface-treated to have a specular gloss of 70 to 250% in accordance with JIS Z8741 or a surface roughness of 0.5 to 10 .mu.m in terms of the ten-point average roughness defined in JIS B0601. This reversible thermosensitive recording material may further comprises a crystal-growth controlling agent in the reversible thermosensitive recording layer.

Abstract: In a heat-sensitive recording material incorporating a colorless or pale-colored basic dye and a color acceptor which is reactive with the basic dye to form a color when contacted therewith, the recording material characterized in that at least one compound represented by the formula ?I! is contained in a heat-sensitive recording layer ##STR1## wherein X is --O-- or --COO--, R.sub.1 to R.sub.4 are each hydrogen atom, alkyl having 1 to 8 carbon atoms, aryl having 6 to 10 carbon atoms, aralkyl having 7 to 9 carbon atoms, chlorine atom, acetyl, propionyl, methoxy, methylthio, methoxycarbonyl, cyano, nitro or cyclohexenyl, substituents R.sub.1 and/or R.sub.2 or substituents R.sub.3 and R.sub.4 may link together to form aromatic ring(s), n is an integer of 1 to 10.