Abstract: A heat-sensitive recording composition comprising agglomerates which comprise a colorless or light-colored dye precursor, a color developer which reacts with the dye precursor upon heating to form a color, and a sensitizer and have an average diameter of 2-30 .mu.m; and a process for producing the composition are disclosed. This heat-sensitive recording composition is excellent in heat responsiveness and high in sensitivity. From the point of image stability, the agglomerates are preferably enclosed in microcapsules together with a polymer.

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: 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: The present invention provides a thermal transfer film which is prevented from static charging phenomenon, sticking phenomenon and staining of thermal head. This transfer film comprises a base film and an antistatic layer comprising an inorganic polymer of polysiloxane containing silanol group or a quaternary ammonium type polyelectrolyte which is provided on at least one side of the base film. A heat meltable ink layer is provided on one side of the base film.

Abstract: A heat-sensitive recording composition comprising agglomerates which comprise an aromatic isocyanate compound, an imino compound and a sensitizer and have an average diameter of 2-30 .mu.m; and a process for producing the composition are disclosed. This heat-sensitive recording composition is excellent in heat response and high in sensitivity. From the point of image stability, the agglomerates are preferably contained in microcapsules together with a polymer.

Abstract: Microcapsules which comprise, (A) a wall comprising a mixture of zirconium chloride and at least one member selected from the group consisting of poly(vinyl alcohol) and its derivatives, and (B) a core material enclosed with the wall; and a process for producing the same. In this invention, any substance can be used as the core material irrespective of its hydrophicity or hydrophobicity, and there can be obtained microcapsules excellent in heat resistance, water resistance, and transparency by simple steps.

Abstract: A recording material containing as a color forming system (a) a colorless or light-colored dye precursor, and (b) an isocyanate compound having aromaticity, and if necessary (c) a color developer is excellent in image retention rates in terms of light resistance and plasticizer resistance and has a large degree of freedom of hues.

Abstract: A heat transfer material comprising a substrate, a heat-meltable ink layer provided on one side of the substrate and a heat-resisting layer provided on the other side of the substrate, the heat-meltable ink layer comprising a carbon black as a coloring agent, a wax and a resin, and the ratio of the absorbance at 600 nm to the absorbance of 850 nm measured according to JIS K 0115 being 1.30 or less. The heat transfer material does not substantially cause roll stain and can be detected by a detector using a near infrared ray.

Abstract: An ink for heat-sensitive recording which comprises, as color developing components, an aromatic or heterocyclic isocyanate compound and an imino compound which are dispersed and/or dissolved in an organic solvent and, as a binder, (1) a copolymer of a mixture of component (a) which is an .alpha.,.beta.-ethylenically unsaturated carboxylic acid and component (b) which is at least one monomer selected from the group consisting of acrylic acid esters, methacrylic acid esters and aromatic vinyl compounds and/or (2) a three-component- or more component-copolymer, the fundamental skeleton of which is composed of isobutylene and maleic anhydride. The ink may additionally contain a heat-meltable substance and the like. The ink has a good wettability to a plastic substrate and can be dried rapidly in a printing machine.

Abstract: Disclosed is a recording material which comprises a normally colorless or palely colored dye precursor and a developer which causes the dye precursor to form color upon contact with the dye precursor, said developer being a copolymer of (A) a styrene monomer with (B) at least one monomer selected from the group consisting of a vinylsulfonic acid type monomer, a (meth)acrylic type phosphorous-containing monomer and a (meth)acrylic acid type monomer. This recording material is excellent in stability of color image portion and non-image portion.

Abstract: A heat-transfer recording material comprising a thin film support having a thermally meltable or thermally sublimable ink layer applied on one side thereof, said thin film support being made of a stretched, cross-linked polyethylene film. The ink layer contains preferably 2 to 15% by weight an oily antistatic agent. The heat transfer recording material is excellent in antisticking property and suitability for film.

Abstract: A thermal transfer recording sheet comprising a substrate and a hot-melt ink containing layer coated on one side of the substrate, said hot-melt ink layer comprising materials which cause cohesive failure by heat at the time of transfer, which thermal transfer recording sheet can give lusterless mat-type letters.

Abstract: There is disclosed an image-receiving, transfer recording sheet excellent both in the preciseness of the image and the gradation reproducibility, characterized in that the heat insulating layer comprises macromolecular microspheres mainly made of hollow resin particles and/or heterogenous resin particles.

Abstract: The present invention provides a thermal transfer recording sheet which can form a matte and glossless image high in quality on an image receiving sheet. This thermal transfer recording sheet comprises a support and an undercoating layer comprising a heat-meltable olefin resin and a heat-meltable ink layer laminated in succession on one side of said support wherein difference in melting point of the undercoating layer and that of the heat-meltable ink layer is 20.degree. C. or less and the undercoating layer and the heat-meltable ink layer mix with each other and melt in the vicinity of interface therebetween after coating of these layers. The thickness of the under coating layer is preferably 0.5-5.0 .mu.m.

Abstract: The photosensitive, pressure-sensitive recording sheet of plain paper transfer type of the present invention can be obtained by coating on a substrate, microcapsules mainly containing a photocurable resin and a reactant. This photosensitive, pressure-sensitive sheet can conduct multicolor transfer recording on a plain paper and accordingly has a very high industrial value in light of recent request for transfer recording of color manuscripts.

Abstract: This invention relates to a photosensitive heat-transfer recording sheet and a photosensitive pressure-sensitive recording sheet both using photocurable microcapsules. These sheets enable transfer of multi-color images onto plain papers and accordingly have a very important industrial significance under the present situation where duplicate recording of color images is required.

Abstract: An improved process for producing double-capsules by dispersing in a hydrophobic substance a dispersion of microcapsules containing as the core material a hydrophilic substance or a hydrophobic substance, the latter of which is the same as or different from the first named hydrophobic substance, wherein the improvement is characterized in that the first named hydrophobic substance has a viscosity of 40 to 150,000 cps at 25.degree. C.

Abstract: A thermal transfer recording material comprising a combination of a donor sheet having a heat meltable ink layer on a support and an image receiving sheet which are superposed so that the heat meltable ink layer on the donor sheet contacts with the image receiving sheet, the thermal transfer being carried out by a thermal head, wherein either said donor sheet or said image receiving sheet or both sheets are characterized by being such that1. the heat meltable ink layer of the donor sheet principally comprises a colored dye or pigment, a binder and a wax which are coated on the support as an aqueous solution and/or an aqueous emulsion;2. the image receiving sheet has, coated thereon, a heat meltable substance having a melting point higher than that of said heat meltable ink layer.

Abstract: A heat-sensitive thermal transfer recording sheet having a heat-sensitive color-forming layer formed on a front side of a substrate and a thermal transfer layer formed on the back side of the substrate and comprising (a) an aromatic isocyanate compound and (b) an imino compound and (c) a low melting point substance such as wax has a white background and excellent image storability. By adding an electron donating colorless dye and an electron-accepting compound to the thermal transfer layer, the transfer density can be improved.

Abstract: A thermal transfer recording sheet comprising a support containing plate-like or lamellar inorganic fine particles therein and a thermal transfer coloring ink layer formed on one side of the support, and if required a heat resistant layer formed on another side of the support, hardly provides wear of a thermal head surface while maintaining good take-up characteristics of synthetic resin film used as a support.