Abstract: An ink-jet recording medium having at least a light-reflecting layer and a dye-fixing layer formed in this order on a base material in a multilayer structure, wherein the light-reflecting layer contains two or more pigments different in chemical composition, and wherein the average particle size of a pigment (A) having a highest liquid absorbency in the pigments is smaller than the average particle size of a pigment (B) having a lowest liquid absorbency in the pigments.

Abstract: An ink-jet recording medium having at least a light-reflecting layer and a dye-fixing layer formed in this order on a base material in a multilayer structure, wherein the light-reflecting layer contains two or more pigments different in chemical composition, and wherein the average particle size of a pigment (A) having a highest liquid absorbency in the pigments is smaller than the average particle size of a pigment (B) having a lowest liquid absorbency in the pigments.

Abstract: A recording medium comprising on a base material an ink-receiving layer containing an alumina hydrate, said ink-receiving layer being formed by applying a coating liquid containing said alumina hydrate to said base material followed by drying to form a layer to be said ink-receiving layer, swelling said layer to be said ink-receiving layer again, and pressing the swollen layer to a heated mirror-finish drum for drying, the glossiness of the surface of the recording medium on the side of the ink-receiving layer as measured at 20° being 20% or more.

Abstract: Disclosed herein is a recording medium comprising a base material, and at least one resin selected from a primary amine resin and a secondary amine resin and a hindered amine compound contained in the base material and/or on the surface of the base material.

Abstract: Disclosed herein is a recording medium comprising a base material and an ink-receiving layer containing a particulate material provided on the base material, wherein the particulate material comprises aluminum oxide particles of the &ggr;-crystal structure, the average particle diameter of the aluminum oxide particles is at least 0.21 &mgr;m, but at most 1.0 &mgr;m, at least 90% of all the aluminum oxide particles have a particle diameter of at most 1.0 &mgr;m, and the specular glossiness of the surface of the ink-receiving layer is at least 50% as measured at 75°.

Abstract: An ink-jet recording medium comprising a base material and an ink-receiving layer provided thereon. The ink-receiving layer comprises an upper layer containing an aluminum-based pigment and a lower layer containing an aluminum-based pigment having a BET specific surface area larger than that of the aluminum-based pigment contained in the upper layer.

Abstract: A recording medium comprises a porous outermost layer on a substrate, the porous outermost layer containing a particulate thermoplastic resin, and the particulate thermoplastic resin exhibiting a &Dgr;E value of not higher than 20 after light exposure. The difference of glass transition temperature of the particulate thermoplastic resin from minimum film-forming temperature thereof may be not less than 10° C., and the minimum film-forming temperature is not lower than 50° C. A process for producing the recording medium comprises forming a porous outermost layer by heat treatment at a temperature of not lower than the glass transition temperature of the particulate thermoplastic resin, but not higher than the minimum film-forming temperature thereof.

Abstract: Provided is a fine powder material for forming an ink-receiving layer on a recording medium, wherein a pore radius maximum exists within a range of from 90 to 120 Å in a pore radius distribution of said fine powder material and wherein a total volume of pores having radii not exceeding 50 Å is not more than 6.0% of a volume of all pores.

Abstract: An ink-jet recording medium having at least a light-reflecting layer and a dye-fixing layer formed in this order on a base material in a multilayer structure, wherein the light-reflecting layer contains two or more pigments different in chemical composition, and wherein the average particle size of a pigment (A) having a highest liquid absorbency in the pigments is smaller than the average particle size of a pigment (B) having a lowest liquid absorbency in the pigments.

Abstract: Disclosed herein is a recording medium comprising a base material, and at least one resin selected from a primary amine resin and a secondary amine resin and a hindered amine compound contained in the base material and/or on the surface of the base material.

Abstract: Disclosed herein is a recording medium comprising a base material and an ink-receiving layer containing a particulate material provided on the base material, wherein the particulate material comprises aluminum oxide particles of the &ggr;-crystal structure, the average particle diameter of the aluminum oxide particles is at least 0.21 &mgr;m, but at most 1.0 &mgr;m, at least 90% of all the aluminum oxide particles have a particle diameter of at most 1.0 &mgr;m, and the specular glossiness of the surface of the ink-receiving layer is at least 50% as measured at 75°.

Abstract: An ink-jet recording medium comprising a base material and an ink-receiving layer provided thereon. The ink-receiving layer comprises an upper layer containing an aluminum-based pigment and a lower layer containing an aluminum-based pigment having a BET specific surface area larger than that of the aluminum-based pigment contained in the upper layer.

Abstract: A recording medium comprising a base material and an ink-receiving layer provided on the base material and containing a particulate material, the particulate material containing particles of crystalline aluminum oxide, the ink-receiving layer being obtained by applying a coating solution containing the particulate material to the base material followed by drying to form a coating layer, applying water to the coating layer to cause swelling and pressing the surface thereof against a heated mirror-surface drum to conduct drying treatment, wherein the specular gloss of the surface of the ink-receiving layer is not less than 20% as measured at 20°.

Abstract: There is provided a recording medium comprising a substrate and an ink-receiving layer containing alumina hydrate formed thereon, wherein the alumina hydrate is present unoriented in the ink-receiving layer and a diffraction intensity fluctuation &dgr; in a diffraction pattern is not more than 5%, when irradiating an electron beam to a cross section of the ink-receiving layer.

Abstract: Disclosed herein is a recording medium comprising a base material and a porous surface layer containing particles of a thermoplastic resin, wherein the breadth of the particle size distribution of the particles of the thermoplastic resin is within 3.sigma., and the proportion of particles having a particle size at most a fifth of the average particle size of the particles of the thermoplastic resin is 10% or lower.

Abstract: A coated paper comprising a paper substrate, a pseudo-boehmite layer formed on the substrate and a silica layer laminated on the pseudo-boehmite layer, said coated paper having a 60.degree. specular glossiness of at least 30% as stipulated in ISO 2813.

Abstract: A coated paper comprising a paper substrate and a pseudo-boehmite layer formed on the substrate, wherein said pseudo-boehmite layer has a specular glossiness at 60.degree. of at least 30% as measured in accordance with JIS Z8741.

Abstract: A recording sheet comprising a substrate and a colorant absorbing layer made of a porous inorganic oxide, formed on the substrate, wherein said colorant absorbing layer contains an organic acid with the first acid dissociation exponent of at most 5, which has an aromatic nucleus or at least two carboxyl groups.

Abstract: An electrostatic image transfer recording sheet which comprises a substrate having, on one side thereof, an image-forming layer made of a porous alumina hydrate and, on the other side, a porous alumina hydrate layer.

Abstract: The present invention relates to a method for producing a tobacco raw material having at least a part of its surface coated with a silical gel, which comprises adding silica sol to the tobacco raw material and subjecting the silical gel to gelation.