Abstract: An object is to provide a composition that contains a phosphorus-containing carbon quantum dot and can efficiently emit relatively long wavelength light. The composition to achieve the above object contains: a phosphorus-containing carbon quantum dot containing phosphorus as a heteroatom; and a smectite.

Abstract: The present invention provides a novel pretreating agent to improve the effect of ink-jet printing on polyester fabric and its application, and this invention belongs to the field of digital ink-jet printing. Stirring the dispersing agent, which includes many procedures of wetting agent and deionized water in a stirrer, adding nano-porous oxide dispersoid. Furthermore, keep stirring for 30 min and put the mixture in a sand mill to grinded for 2 h, then nano-porous oxide dispersoid is eventually got. The nano-porous oxide dispersoid work as pretreating agent, which used in the polyester fabric, is treated like pretreating agent during the padding process. By applying this technique into double-sided permeation ink-jet printing and direct-injection ink-jet printing, its pattern's definition, color depth and color saturation could be remarkable enhanced.

Abstract: A recording medium includes, in this order, a substrate, a first ink receiving layer containing inorganic particles, polyvinyl alcohol and a boric acid compound, and a resin layer containing a resin. In the first ink receiving layer, hydrated alumina accounts for 70% by mass or more of the inorganic particles. In the recording medium, the ratio of the boric acid compound content to the polyvinyl alcohol content is 30% by mass or more.

Abstract: A recording medium includes a base and an ink receiving layer. The ink receiving layer contains inorganic particles. The surface of the recording medium has an arithmetic mean roughness of 0.8 ?m or more in accordance with JIS B 0601:2001. The surface of the recording medium includes openings having a width of 30 ?m or less and a length of 500 ?m or less. The number of the openings is 5 or more and 30 or less per 1 mm2 of the surface of the recording medium.

Abstract: A recording medium includes an ink-receiving layer formed by applying a coating liquid onto at least one surface of a substrate and drying the coating liquid, the coating liquid containing hydrated alumina and a binder, in which the hydrated alumina in the coating liquid has an average particle size of 100 nm to 250 nm, the surface of the ink-receiving layer has an arithmetic average roughness Ra of 0.8 ?m to 2.5 ?m, the arithmetic average roughness Ra being specified by JIS B0601:2001, and the surface of the ink-receiving layer has a specular gloss at 60° of 10.0% or less, the specular gloss at 60° being specified by JIS Z8741.

Abstract: Provided is an ink jet recording medium which is capable of reproducing a wide range of gloss including high luster like metallic luster and substantially no luster due to matting by varying only the amount of applied ink and in which the consumption of a white ink used to adjust the glossiness thereof is small.

Abstract: An inkjet print medium with a glossy ink-receiving surface, which includes a substrate, an undercoat layer containing acrylic-polyurethane hybrid polymer and polyoxazoline; and at least one ink-receiving layer containing inorganic pigment particles and a binder, wherein the undercoat is formed between the substrate and the at least one ink-receiving layer.

Abstract: A method for estimating the color of a coated print includes: measuring the color of an uncoated print with a color measuring device; and estimating the color of the print when coated by a coating process based on the uncoated color measurement using a function that correlates uncoated color measurements and coated color measurements; and adjusting at least one parameter of the printing process based on the coated color estimation. The correlating function may be derived by measuring the color of a plurality of uncoated color patches; measuring the color of the plurality of patches after the patches have been coated by the coating process; and correlating the color of the coated patches with the uncoated patches based on the coated and uncoated color patch measurements.

Abstract: There is provided an inkjet recording ink and recording media set, which contains: an inkjet recording ink; and a recording medium, wherein the inkjet recording ink comprises at least: water; a water-soluble organic solvent; and a colorant containing carbon black, and having a volume average particle diameter of 40 nm to 100 nm, wherein the recording medium contains: a substrate; and a coating layer on at least one side of the substrate, and wherein an amount of pure water transferred to the recording medium, as measured with a dynamic scanning absorptometer at 23 C and 50% RH, at a contact time of 100 ms is 2 ml/m2 to 35 ml/m2 while an amount of pure water transferred to the recording medium at a contact time of 400 ms is 3 ml/m2 to 40 ml/m2.

Abstract: The invention relates to a gloss coated multifunctional printing paper that can be used with a variety of office printing equipment including inkjet and electrophotographic and to processes of making and using the paper, a paper substrate; and a pigmented composition coated on at least one surface of the substrate, said pigmented coating composition comprising (1) a first pigment having a BET surface area in the range of from about 50 to about 750 m2/g; (2) a second pigment having a BET surface area in the range of from about 5 to about 49 m2/g; and (3) a polymeric binder. Said coated paper having a coating gloss equal to or greater than about 30% at 75° and a Bristow Absorption length of less than about 180 mm. The coating compositions may contain other additives such as lubricants, optical brighteners and coating rheology modifiers.

Abstract: The object of the present invention is to provide a coated printing paper used for ink jet printing machines, which has an ink fixing property and ink absorption property corresponding to ink jet printing, which inhibits poor dot diffusion, and which is excellent in abrasion resistance property of printed portions. According to the present invention, provided is a coated printing paper comprising a base paper, an undercoating layer which is applied on at least one surface of the base paper and contains a pigment and a binder, and one or more coating layers on the undercoating layer, wherein the base paper contains at least one selected from a cationic resin and a multivalent cation salt; the uppermost coating layer contains at least a colloidal silica; and the 75° gloss according to JIS Z8741 of the surface of the uppermost coating layer is 40% or more.

Abstract: An ink-jet recording method including recording onto a recording medium a black image of composite black using a black ink and color inks, wherein the black ink includes water, a water-soluble organic solvent, a surfactant, and a carbon black whose volume average particle diameter is 40 nm to 100 nm, and the color inks include a cyan ink, a magenta ink and a yellow ink, wherein the mass ratio (A/B) of a solid content A to a water-soluble organic solvent content B in the black ink is in the range of 1/8 to 1/15, and wherein the recording medium includes a support with a coating layer, and the amounts of purified water transferred to the recording medium at contact periods of 100 ms and 400 ms at a temperature of 23 C and a relative humidity of 50% are 2 ml/m2 to 35 ml/m2 and 3 ml/m2 to 40 ml/m2 respectively.

Abstract: An inkjet print medium with a glossy ink-receiving surface, which includes a substrate, an undercoat layer containing acrylic-polyurethane hybrid polymer and polyoxazoline; and at least one ink-receiving layer containing inorganic pigment particles and a binder, wherein the undercoat is formed between the substrate and the at least one ink-receiving layer.

Abstract: The specification pertains to a single or multiple coated printing sheet in particular but not exclusively for sheet-fed offset printing with an image receptive coating layer on a paper substrate. Unexpectedly short converting times and times until reprinting can be achieved by choosing a coating, in which the image receptive coating layer comprises a top layer and/or at least one second layer below said top layer, said top and/or second layer comprising a pigment part, wherein this pigment part is composed of 1-95 preferably of 80-95 parts in dry weight of a fine particulate carbonate and/or of a fine particulate kaolin or clay and 1-100, preferably 6 to 25 parts in dry weight of a fine particulate silica, and a binder part, wherein this binder part is composed of 5-20 parts in dry weight of binder and less than 4 parts in dry weight of additives. Furthermore methods for making such a printing sheet and uses of such a printing sheet are disclosed.

Abstract: Provided is an ink jet recording medium which is capable of reproducing a wide range of gloss including high luster like metallic luster and substantially no luster due to matting by varying only the amount of applied ink and in which the consumption of a white ink used to adjust the glossiness thereof is small.

Abstract: A recording medium includes an ink-receiving layer formed by applying a coating liquid onto at least one surface of a substrate and drying the coating liquid, the coating liquid containing hydrated alumina and a binder, in which the hydrated alumina in the coating liquid has an average particle size of 100 nm to 250 nm, the surface of the ink-receiving layer has an arithmetic average roughness Ra of 0.8 ?m to 2.5 ?m, the arithmetic average roughness Ra being specified by JIS B0601:2001, and the surface of the ink-receiving layer has a specular gloss at 60° of 10.0% or less, the specular gloss at 60° being specified by JIS Z8741.

Abstract: The invention provides an ink jet recording medium comprising a support and an ink receiving layer provided on at least one surface of the support. In one embodiment, a center line average roughness average Ra of a surface of the ink-receiving layer, measured with a 2.5 mm measuring length and 0.8 mm cut-off value, is in a range of 0.3 ?m or more but less than 0.8 ?m. In another embodiment, a center line average roughness average Ra of the surface of the support measured with a 2.5 mm measuring length and 0.8 mm cut-off value, is preferably in a range of 0.3 ?m or more but less than 1.0 ?m. An image clarity of the surface of the ink receiving layer is preferably in a range of 2 to 40%.

Abstract: An inkjet recording medium, including a support and an ink receiving layer formed on at least one face of the support, wherein the inkjet recording medium satisfies at least one of the following conditions (i) and (ii): (i) the arithmetical mean deviation of the assessed profile Ra, as specified in JIS-B-0601(2001), of a surface of the ink receiving layer, determined with an evaluation length of 2.5 mm and a cutoff value of 0.8 mm, is 0.3 to 1.2 ?m, and the peak value (reflectance) of the surface of the ink receiving layer, as determined by a goniophotometer, is in the range of 30 to 80%; and (ii) the arithmetical mean deviation of the assessed profile Ra, as specified in JIS-B0601(2001), of a surface of the support, determined with an evaluation length of 2.5 mm and a cutoff value of 0.8 mm, is 0.3 to 1.5 ?m, and the peak value (reflectance) of the surface of the support, as determined by a goniophotometer, is in the range of 20 to 80%.

Abstract: An ink-jet media having an absorbent substrate with a front surface and a back surface. The front surface of the substrate is coated with an ink-vehicle permeable, preferably radiation-cured coating. A microporous ink-receptive coating is deposited on top of the ink-vehicle permeable coating. An optional protective layer may be deposited on top of the microporous ink-receptive layer. The back surface of the substrate may also be optionally coated with a polymer curl-controlling coating.

Abstract: The invention relates to a gloss coated multifunctional printing paper that can be used with a variety of office printing equipment including inkjet and electrophotographic and to processes of making and using the paper. a paper substrate; and a pigmented composition coated on at least one surface of the substrate, said pigmented coating composition comprising (1) a first pigment having a BET surface area in the range of from about 50 to about 750 m2/g; (2) a second pigment having a BET surface area in the range of from about 5 to about 49 m2/g; and (3) a polymeric binder, Said coated paper having a coating gloss equal to or greater than about 30% at 75° and a Bristow Absorption length of less than about 180 mm. The coating compositions may contain other additives such as lubricants, optical brighteners and coating rheology modifiers.

Abstract: An inkjet recording element comprising an absorbent support, a porous base layer nearest the support, a porous ink-receiving intermediate layer above the base layer, and a porous ink-receiving upper layer above the intermediate layer. The base layer and intermediate layers are each present in an amount of at least 25 g/m2 and the total dry weight coverage of the base layer, the intermediate layer, and the upper layer is 60 to 130 g/m2 in order to handle high fluxes of ink compositions during printing and to provide high gloss upon calendering. Also disclosed is an advantageous method of making such inkjet recording materials.

Abstract: The object of the present invention is to provide an ink jet recording material which has no cracks on the surface of the ink-receiving layer and possesses both the color developability and the absorbability of pigment inks. According to the present invention, there is provided an ink jet recording material formed by coating a coating solution of a pigment layer and a coating solution of at least one ink-receiving layer in succession on at least one side of a paper support and drying the resulting coating layers, wherein the pigment contained in the pigment layer has an average secondary particle diameter of not less than 1 ?m and not more than 5 ?m, 50% by volume or more of the total volume of the pigment has a secondary particle diameter of not less than 1.

Abstract: The invention relates to an image-recording element comprising a support and an image-receiving layer, wherein the image-receiving layer comprises anionic colloidal silica particles, hydrophilic polymeric binder, and fluorosurfactant, wherein the binder is present in an amount of between 2% and 15% weight of the image-receiving layer, the image-recording element has a 60-degree gloss of greater than 25, and a dry time of less than 1 minute.

Abstract: An inkjet recording medium obtained by forming a coating layer containing a pigment and a binder on the surface of a base material and coating layer is subsequently pressed onto a heated mirror finished surface to dry to form an ink absorbing layer through a cast coating method, wherein pigment contains a colloidal silica that has a primary particle diameter of from 10 nm to 100 nm while the ratio of the secondary particle diameter to primary particle diameter is from 1.5 to 3.0.

Abstract: A coating composition comprising low sodium containing colloidal silicas and ink jet recording sheets prepared from such coatings are described. The coating comprises binder and colloidal silica preferably having an average particle size in the range of about 1 to about 300 nanometers and which has a solids to alkali metal ratio of at least the sum of AW(?0.013SSA+9), AW being the atomic weight of alkali metal present in the colloidal silica and SSA being the specific surface area of the silica. It has been discovered that if the alkali metal, e.g., sodium, content of colloidal silica is reduced, coatings prepared from such colloidal silica and applied to conventional ink jet recording sheet supports provide a specular gloss of at least 30 at 60° C., even at a relatively high silica solids to binder solids ratio of 1:1 or greater.

Abstract: An ink jet recording material of the invention includes a polyolefin resin-covered paper substrate, an ink absorption layer and a layer principally including colloidal silica in this order at one face of the substrate, and a backcoat layer at an opposite face of the substrate. An MD direction Taber stiffness of the substrate is at least 3 mN·m. The ink absorption layer principally includes fumed silica, and the backcoat layer is principally polyurethane resin. The ink absorption layer includes a thioether-based compound, and a polyolefin resin layer at a side of the substrate at which the ink absorption layer is to be provided includes an fluorescent brightening agent and a white pigment. A solid content coating amount of the colloidal silica is 0.05 to 0.3 g/m2, and a solid content coating amount of the polyurethane resin is 0.8 to 1.5 g/m2. A 20° glossiness of a blank portion of a face of the recording material that features the ink absorption layer is 40 to 60%.

Abstract: An inkjet recording medium, including a support and an ink receiving layer formed on at least one face of the support, wherein the inkjet recording medium satisfies at least one of the following conditions (i) and (ii): (i) the arithmetical mean deviation of the assessed profile Ra, as specified in JIS-B-0601(2001), of a surface of the ink receiving layer, determined with an evaluation length of 2.5 mm and a cutoff value of 0.8 mm, is 0.3 to 1.2 ?m, and the peak value (reflectance) of the surface of the ink receiving layer, as determined by a goniophotometer, is in the range of 30 to 80%; and (ii) the arithmetical mean deviation of the assessed profile Ra, as specified in JIS-B0601(2001), of a surface of the support, determined with an evaluation length of 2.5 mm and a cutoff value of 0.8 mm, is 0.3 to 1.5 ?m, and the peak value (reflectance) of the surface of the support, as determined by a goniophotometer, is in the range of 20 to 80%.

Abstract: An inkjet recording medium comprising a support and an ink-receiving layer on a support, wherein the hardness of the ink-receiving layer is 9.0 or more; and the D/I value of the ink-receiving layer defined by ASTM E430 is 40 or more, or an inkjet recording medium comprising a support and an ink-receiving layer on a support, wherein the hardness of the ink-receiving layer is 9.0 or more; and the center surface average roughness (SRa) of the ink-receiving layer is 0.1 ?m or less when measured under the condition of cutoff of 0.02 to 0.5 mm, and 0.4 ?m or less when measured under the condition of cutoff of 1 to 3 mm.

Abstract: The present invention is drawn to a composition for cast-coating on ink-jet media. The composition includes a liquid vehicle, silica particulates, and an internal release agent. The composition is substantially free of polymeric binder and can improve the glossiness of a porous particulate-coated ink-receiving media by at least 2 gloss units at 20 degrees. The silica particulates can be suspended in the liquid vehicle at about 1-35 wt %, and can have a particle size of less than about 150 nm. The internal release agent can be present at about 0.5-10 wt %.

Abstract: The present invention relates to an ink jet recording sheet comprising a sheet-like substrate, and an ink receiving layer formed on at least one surface of the sheet-like substrate, the ink receiving layer containing an amorphous silica having an average particle size 0.5 to 10 ?m and a binder, the sheet-like substrate being subjected to a calendering treatment after forming the ink receiving layer thereon, thereby white-paper gloss of the recording sheet measured at 75° in accordance with JIS Z 8741 is from 30 to 90%.

Abstract: A gloss-imparting device for imparting a gloss on a color image, the gloss-imparting device has a transparent toner image-carrying body, a transparent toner image-forming unit, a heating/pressurizing unit, and a cooling/releasing unit. The transparent toner image-carrying body carries a transparent toner image formed of a transparent toner thereon. The transparent toner image-forming unit forms the transparent toner image on the transparent toner image-carrying body. The heating/pressurizing unit heats and pressurizes the transparent toner image and the base material to bring them into contact. The cooling/releasing unit cools the transparent toner image and releases the base material from the transparent toner image-carrying body. The transparent toner image is transferred and fixed onto the base material by the heating/pressurizing unit.

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 gloss-imparting device for imparting a gloss on a color image, the gloss-imparting device has a transparent toner image-carrying body, a transparent toner image-forming unit, a heating/pressurizing unit, and a cooling/releasing unit. The transparent toner image-carrying body carries a transparent toner image formed of a transparent toner thereon. The transparent toner image-forming unit forms the transparent toner image on the transparent toner image-carrying body. The heating/pressurizing unit heats and pressurizes the transparent toner image and the base material to bring them into contact. The cooling/releasing unit cools the transparent toner image and releases the base material from the transparent toner image-carrying body. The transparent toner image is transferred and fixed onto the base material by the heating/pressurizing unit.

Abstract: A coated paper comprised of a paper substrate, at least one surface of which is provided with at least one coating layer, characterized in that the surface of said coating layer has cracks of a width of 0.2 to 3.0 ?m and a length of 3 to 1000 ?m in an amount of 1 to 1000 cracks per mm2 is provided. In another embodiment, a coated paper comprised of a paper substrate, at least one surface of which is provided with at least two coating layers, characterized in that an inner coating layer adjoining said paper substrate comprises a pigment having a crystal structure selected from the group consisting of acicular crystal, spindle-shape crystal, columnar crystal, and rice-shape granulated crystal, and starches, and an outermost coating layer formed on said inner coating layer comprises crack formation promoting particles and a styrene-butadiene copolymer having a glass transition temperature of 20 to 150° C. is provided.

Abstract: The object of the present invention is to obtain a double-side ink jet recording sheet at least one side of which has gloss surface and in which scratches caused by rubbing of sheets hardly occur. According to the present invention, there is obtained a double-side ink jet recording sheet comprising a support provided with at least one ink-receiving layer on each of both sides, wherein at least one side has a gloss surface having a 75° specular glossiness of not less than 40% and the ink-receiving layer on the side opposite to the side having gloss surface contains organic particles having an average particle diameter of 2–40 ?m. The outermost layer of the side having the gloss surface is preferably formed by subjecting to pressure-contact specular finishing by cast-coating method.

Abstract: A pigment-based ink jet ink set and image-recording element combination is described, wherein the ink jet image-recording element has a gloss value of at least 5 when measured at 60°, and wherein each ink in the ink set has a normalized differential specular reflectance, N?RS(X), of less than 1.25. N?RS(X) is defined as the maximum value within a set of N?RS(Xn) values in which each N?RS(Xn) is the normalized specular reflectance for a density patch of a printed test image. The printed test image consists of a series of at least eleven density patches printed such that the ink laydown of the patches increases incrementally, from no ink laydown to a maximum level generating a density of at least 1.

Abstract: A coating composition comprising relatively low alkali cationic colloidal silicas and ink jet recording sheets prepared from such coatings is described. The coating comprises binder and cationic colloidal silica preferably having an average particle size in the range of about 1 to about 300 nanometers and which has a solids to alkali metal ratio of at least the sum of AW(?0.013SSA+9), AW being the atomic weight of alkali metal present in the colloidal silica and SSA being the specific surface area of the silica. It has been discovered that if the alkali metal, e.g., sodium, content of colloidal silica is reduced, coatings prepared from such colloidal silica and applied to conventional ink jet recording sheet supports provide a specular gloss of at least 30 at 60° C., even at a relatively high silica solids to binder solids ratio of 1:1 or greater.

Abstract: A coating composition comprising cationic colloidal silicas and ink jet recording sheets prepared from such coatings is described. The coating comprises binder and polydispersed cationic colloidal silica. The cationic colloidal silica preferably has an average particle size in the range of about 1 to about 300 nanometers. It has been discovered that if a cationic polydispersed colloidal silica is employed in a glossy coating formulation, the coating provides a specular gloss of at least 30 at 60° C., even at a relatively high silica solids to binder solids ratio of 1:1 or greater, but also a coating having good to excellent printability characteristics.

Abstract: A coating composition comprising a relatively low alkali-containing colloidal silica and glossy ink jet recording sheets prepared from such coatings is described. The coating comprises binder and colloidal silica, e.g., having an average particle size in the range of about 1 to about 300 nanometers. The low alkali colloidal silica of this invention comprises ammonia, polydispersed colloidal silica, or both. Polydispersed silicas having a particle size distribution such that the median particle size is in the range of 15 to 100 nanometers and 80% of the particles span a range of at least about 30 to about 70 nanometers are preferred. It has been discovered that coatings prepared from such colloidal silica and applied to conventional ink jet recording sheet supports have a specular gloss of at least 30 at 60° C., and excellent printability at silica solids to binder solids ratio of 1:1 or greater.

Abstract: An ink-jet recording sheet comprising a reflective support having thereon a porous ink absorbing layer containing a dye or a pigment, wherein a color difference ?abL defined by the following formula is not more than 7: ?abL=[(a1?a2)2+(b1?b2)2+(L1?L2)2]1/2 wherein (L1, a1, b1) and (L2, a2, b2) each are a set of coordinates (L*, a*, b*) defined in a CIELAB color space and measured on a surface of the reflective support adjacent to the ink absorbing layer and on an outermost surface of the ink absorbing layer respectively, and a2 is in a range of ?2 to 2 and b2 is in a range of ?4 to 4.

Abstract: The object of the present invention is to provide an ink jet recording sheet which can give an image having an appearance looking like a picture, especially, an oil painting with maintaining sufficient print density. According to the present invention, there is provided an ink jet recording sheet comprising a support and an ink receiving layer provided on one side of the support, where the support is a fabric and the surface of the ink receiving layer has an arithmetical mean roughness of not more than 30 ?m measured in accordance with JIS B0601. The present invention further provides an ink jet recording sheet mentioned above, wherein the ink receiving layer is coated on a pigment layer coated on at least one side of the fabric or on at least one side of the fabric impregnated with a pigment component. The ink receiving layer preferably contains a gas phase method silica.

Abstract: Disclosed is a recording paper which comprises (a) a cellulosic base sheet having a first surface and a second surface opposite the first surface, said base sheet having a dielectric constant of at least about 1.5 under conditions of about 50 percent relative humidity and at about 23° C., said base sheet having a dielectric constant of no more than about 10 under conditions of about 50 percent relative humidity and at about 23° C., said base sheet having, under conditions of about 50 percent relative humidity and at about 23° C., a surface resistivity of at least about 1×107 ohms per square, said base sheet having, under conditions of about 50 percent relative humidity and at about 23° C., a surface resistivity of no more than about 1×1013 ohms per square; (b) on the first surface of the base sheet an image receiving coating comprising a monomeric or polymeric material, said image receiving coating having a glass transition temperature of at least about 55° C.

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: The invention provides a porous resin film having a good absorption of water content as a solvent for aqueous ink or aqueous paste and a recording medium comprising the porous resin film. The recording medium is characterized by the capability of absorbing an ink without density unevenness even during ink jet recording if the ejected amount of ink is great. The invention lies in a porous resin film comprising: a thermoplastic resin in an amount of 30 to 90% by weight; and an inorganic and/or organic finely divided powder in an amount of 10 to 70% by weight, wherein the inorganic and/or organic finely divided powder is surface-treated with a surface treating agent (A) made of a copolymer of diallylamine salt or alkyl diallylamine salt (a1) with a nonionic hydrophilic vinyl monomer (a2) and an anionic surface treating agent (B), and the porous resin film has a liquid absorption capacity of not smaller than 0.5 ml/m2 as measured by “Japan TAPPI No. 51-87”.

Abstract: In an ink jet recording sheet including a substrate sheet having a base paper sheet and at least a front polyolefin laminate layer formed on at least a front surface of the base paper sheet, and an ink receiving layer formed on the front polyolefin laminate layer, the surface of the front polyolefin laminate layer has a center-line mean roughness (Ra) of 0.1 to 10 &mgr;m, determined in accordance with JIS B 0601-1982, the ink receiving layer contains a mixture of hydroxypropylmethyl cellulose with polyvinyl pyrrolidone in a mixing weight ratio of 100:10 to 100:150 and has a 75° specular gloss of 30% or more determined in accordance with JIS P 8142-1993.

Abstract: An ink-jet recording sheet comprising a support and an ink-absorbable layer is disclosed. The ink-absorbable layer is a void layer containing fine inorganic particles having a dispersion degree of no more than 2 and a hydrophilic binder. The ink-jet recording sheet has a specular gloss specified by JIS Z8741, of at least 20 percent at 60 degrees of the surface of said ink absorbable layer, and exhibits the specular gloss such that 60-degree specular gloss of an ink-recorded part is 3 percent more than that of a nonink-recorded part.

Abstract: Disclosed is an inkjet recording sheet having a colorant-receiving layer on the surface of its support, in which the colorant-receiving layer contains at least one of compounds represented by the following general formula (1) and compounds represented by the following general formula (2), and contains a vapor-phase-process silica, a polyvinyl alcohol, a boron compound, and a mordant. In the formulae, R represents a saturated hydrocarbon group having from 1 to 12 carbon atoms, an unsaturated hydrocarbon group having from 1 to 12 carbon atoms, a phenyl group, or an acyl group, and n indicates an integer of 1 to 3.

Abstract: A coating composition comprising a relatively low alkali-containing colloidal silica and glossy ink jet recording sheets prepared from such coatings is described. The coating comprises binder and colloidal silica, e.g., having an average particle size in the range of about 1 to about 300 nanometers. The low alkali colloidal silica of this invention comprises ammonia, polydispersed colloidal silica, or both. Polydispersed silicas having a particle size distribution such that the median particle size is in the range of 15 to 100 nanometers and 80% of the particles span a range of at least about 30 to about 70 nanometers are preferred. It has been discovered that coatings prepared from such colloidal silica and applied to conventional ink jet recording sheet supports have a specular gloss of at least 30 at 60° C., and excellent printability at silica solids to binder solids ratio of 1:1 or greater.

Abstract: A gloss-imparting device for imparting a gloss on a color image, the gloss-imparting device has a transparent toner image-carrying body, a transparent toner image-forming unit, a heating/pressurizing unit, and a cooling/releasing unit. The transparent toner image-carrying body carries a transparent toner image formed of a transparent toner thereon. The transparent toner image-forming unit forms the transparent toner image on the transparent toner image-carrying body. The heating/pressurizing unit heats and pressurizes the transparent toner image and the base material to bring them into contact. The cooling/releasing unit cools the transparent toner image and releases the base material from the transparent toner image-carrying body. The transparent toner image is transferred and fixed onto the base material by the heating/pressurizing unit.