Konica Corporation

Konishiroku Photo Industry Co., Ltd.

Keiji Ohbayashi

Masaru Tsuchiya

Mitsuhiro Okumura

Kaoru Onodera

Shigeo Tanaka

Yoshinori Tsubaki

Shigeo Chino

Shinichi Nakamura

Yoichi Saito

Masaru Iwagaki

Makoto Kajiwara

Akihiko Miyamoto

Kenichi Yoshitsuka

Shigeharu Koboshi

Kazuhiro Kobayashi

Atsushi Saito

Eisaku Katoh

Tawara Komamura

Masao Ishikawa

Hidenobu Ohya

Noboru Mizukura

Takahiko Nojima

Kenzo Kasahara

Kazuhiro Miyazawa

Masayuki Ushiku

Kazuhiro Murai

Yuichiro Maehara

Yoshihiro Mochizuki

Sohei Goto

Takaaki Kojima

Kimie Tachibana

Osamu Hatano

Harue Ebisawa

Keiko Nakabayashi

Akiyoshi Tai

An ink-jet recording sheet comprising a substrate having thereon a porous layer formed by a process comprising the steps of:

Method for preparing an ink-jet recording sheet with a constant and a falling drying rate

An ink jet recording sheet comprising a non-water absorptive support having thereon an ink absorptive layer comprising polyvinyl alcohol, a cationic polymer, and a compound containing a zirconium or aluminum atom other than zirconium oxide and aluminum oxide, wherein a surface pH of the ink absorptive layer is 4 to 6 measured 30 minutes after receiving a water based ink of pH range 6 to 9 jetted from an ink jet printer in an amount of 20 ml/m .

Ink jet recording sheet

An aqueous coating composition is disclosed. The composition comprises fine organic particles, polyvinyl alcohol, and boric acids or salts thereof and comprising substantially no gelatin, and the same having a viscosity of 10 to 100 cp at 40&deg; C., and a viscosity at 15&deg; C., which is at least 20 times as much as that at 40&deg; C. A coating method of the composition and an ink-jet sheet prepared by employing the composition are also disclosed.

Aqueous coating composition, coating method thereof, and ink-jet recording sheet

The present invention is to provide a ink-jet recording sheet of high ink absorptive property, high cockling resistance, high surface smoothness, low cost, and high image quality with incorporating specially designed void-forming absorptive layer whose absorptiveness is determined by a ratio of a Bristow Test value and a Cobb value.

Ink jet recording media

An ink jet recording sheet is disclosed, comprising a support having on at least one side of the support an ink absorbing layer, wherein the surface of the ink absorbing layer side of the sheet exhibits a center-line mean roughness (Ra) of 0.4 to 2.5 &mgr;m and a ten-point mean roughness (Rz) of 5&times;Ra to 20&times;Ra when measured at a reference length of 2.5 mm and a cut-off value of 0.8 mm.

An ink jet recording medium is disclosed. The recording medium comprises a support and a porous ink absorbing layer comprising inorganic particles and hydrophilic binder which is hardened employing inorganic hardener and organic hardener. The ink jet recording medium exhibits high ink absorbability and desired water resistance without degrading layer brittleness through sufficiently hardening the layer employing an appropriate amount of hardeners.

Ink jet recording medium

An ink jet recording sheet is disclosed. The recording sheet comprises a water non-absorptive support and a porous ink absorptive layer comprising dicyandiamide polycondensation product on the support.

An ink jet recording sheet having a support and an ink absorption layer provided on the support wherein a center line average roughness (Ra) is 0.8 to 4.0 &mgr;m, measured at a standard length of 2.5 and a cut-off value of 0.8 mm of the surface of the ink jet recording sheet on the ink absorption layer side, which is specified in JISB-0601, and a 60-degree specular gloss of the ink jet recording sheet is 10 to 30 percent, which is specified in JIS-Z8741.

An ink-jet recording sheet is disclosed. The recording sheet comprises ink absorption layers containing a cationic substance on both sides of a support having an opacity of not less than 94% according to JIS P 8138.

Ink-jet recording sheet

A method for forming a dye image with high contrast is provided, wherein a heat-processable light-sensitive material comprising a support having thereon a non-light-sensitive layer and a light-sensitive layer containing a light-sensitive silver halide and a dye-providing material capable of releasing or forming a diffusible dye upon heat development is subjected to heat development to release or form the diffusible dye, which is transferred to a dye-receiving material having a dye-receiving layer to form a dye image on the dye-receiving layer, wherein the heat development or the transfer of the dye is carried out in the presence of a compounds represented by formula 1 or 2 and a compound represented by formula 3 or 4,

Dye image forming method

A process of forming images with a heat-developable color light-sensitive material is disclosed. The process of forming images comprises steps of exposing imagewise a heat-developable color light-sensitive material which comprises a support having thereon a light-sensitive layer containing a binder, light-sensitive silver halide emulsion and dye donating substance capable of forming or releasing a diffusible dye upon heat development and superposing a dye image receiving material which comprises a support having thereon a dye receiving layer, over the light-sensitive material during, or after completion of, heat development to transfer dye images to said dye image receiving layer; wherein the dye image receiving layer contains a hydrophilic binder and polymer particles; a weight ration of the hydrophilic binder to the polymer particles is from 1:05 to 1:20; and the heat development and transfer of dye images to the dye image receiving layer are carried out in the substantial absence of water.

Dye image receiving material with polymer particles

Disclosed is a heat developable light-sensitive material that comprises a support having thereon at least one light-sensitive layer containing a silver halide emulsion, a dye-donating substance and a reducing agent, wherein at least one subbing layer comprised of a hydrophobic polymer is provided between the light-sensitive layer nearlest to the support and the support, and at least one said subbing layer contains a photographic useful reagent. A heat developable light-sensitive material according to this invention, can provide control fogging and raise the maximum density, or can improve the maximum density difference without exerting adverse effects on sensitivity and preservability.

Heat developable light-sensitive material

A thermal transfer recording material improved in adhesion of an image-receiving layer to a support comprises an image-receiving element comprising a support having a subbing layer and an image-receiving layer provided thereon in this sequence, said subbing layer containing a hardener.

Thermal transfer image-receiving element

A heat-developable light-sensitive material is disclosed. The material comprises a paper support and provided thereon, a subbing layer containing at least two hydrophobic polymers different from each other in chemical composition, and a light-sensitive layer containing a hydrophilic binder, a light-sensitive silver halide emulsion, a dye-providing substance and a reducing agent in that order. The subbing layer is provided on the paper support by coating a solution containing the hydrophobic polymers dissolved in a solvent, at least one of said polymers being substantially insoluble in the solvent independently.

Heat-developable light-sensitive material

An image forming method using a heat developable light-sensitive material is disclosed. The light-sensitive material is lowered in curling caused by humidity changing at room temperature or heating at development. The method comprises the following steps of

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Hino, Japan

Keiji Ohbayashi