Canon Kabushiki Kaisha

Oriental Photo Industrial Co., Ltd.

Kyo Miura

Hitoshi Yoshino

Yuji Kondo

Tetsuro Fukui

Yoshihiro Oguchi

Yoshio Takasu

Takeo Eguchi

Hiroyuki Sugata

Akihiro Mouri

Hisaaki Kawade

Hiroshi Tomioka

Kazuo Isaka

Kenji Kagami

Yoshihiro Ogawa

Masao Suzuki

Masashi Miyagawa

Masato Katayama

Kazumi Nagano

Hiroshi Fukumoto

Mizuho Hiraoka

Takashi Kai

Toshiya Yuasa

Kohzoh Arahara

Kenichi Matsumoto

Keiko Ikoma

Noboru Tohyama

Kozo Arahara

Yoshhiro Oguchi

Masato Kotayama

Disclosed herein is a recording medium comprising an alumina hydrate having an average pore radius of 20 to 200 &#x212b; and a half breadth of pore radius distribution of 20 to 150 &#x212b;.

Ink-jet recording method using dispersion of alumina hydrate

In a recording medium having a porous ink-receiving layer containing alumina hydrate of boehmite structure formed on a base material, the alumina hydrate has crystallinity ranging from 15 to 80 and microcrystals of the alumina hydrate are directed to be parallel to a plane direction of the ink-receiving layer at a parallelization degree of not less than 1.5. The recording medium is employed in an ink-jet recording method conducting printing by ejecting ink droplets through an orifice onto the recording medium. A process for producing the recording medium comprises the steps of: applying a coating liquid containing alumina hydrate of boehmite structure with shearing stress onto a base material; and drying the coated material to obtain a degree of parallelization of a microcrystal of the alumina hydrate with a plane direction of the ink-receiving layer of not less than 1.5.

Recording medium, process for production thereof, and ink-jet recording method employing the medium

Provided is a recording medium of a multi-layered structure comprising a base layer and a surface layer provided on at least one side of the base layer, wherein the base layer is mainly composed of fibrous material and the surface layer comprises an alumina hydrate of a boehmite structure incorporated in the fibrous material.

Recording medium, and method for producing image using the same

A dispersion of alumina hydrate comprises an alumina hydrate containing 0.1 to 1.0% by weight of a nitrate anion and having an average pore radius of 20 to 200 &angst; and a half breadth of pore radius distribution of 20 to 150 &angst; and deionized water. Another dispersion of alumina hydrate comprises an alumina hydrate containing 0.1 to 1.0% by weight of a nitrate anion and having at least two peaks in pore radius distribution and deionized water. Another dispersion of alumina hydrate comprises a titanium dioxide-containing alumina hydrate containing 0.1 to 1.0% by weight of a nitrate anion and deionized water. In each of these dispersions, when the alumina hydrate is dispersed in water at a solids concentration of 15% by weight to form a dispersion, the viscosity of the dispersion is not higher than 75 cP as measured at 20&deg; C. and the dispersion has a shear rate of 7.9 sec .

Dispersions of alumina hydrate

Disclosed herein is a recording medium comprising an alumina hydrate having an average pore radius of 20 to 200 .ANG. and a half breadth of pore radius distribution of 20 to 150 .ANG..

Recording medium and dispersion of alumina hydrate

A recording medium is provided which is constituted of a base material and an ink-receiving layer formed on the base material and containing alumina hydrate of a boehmite structure, or is constituted of a fibrous material and alumina hydrate of a boehmite structure incorporated therein. The alumina hydrate in the ink-receiving layer or the fibrous material has an interplanar spacing of (020) plane of exceeding 0.617 nm but not more than 0.620 nm, and crystallite size in a direction perpendicular to (010) plane ranging from 6.0 to 10.0 nm.

Process for production of recording medium containing alumina hydrate of

Recording medium, ink-jet recording method using the same, and

Recording medium and ink-jet recording method using the same

A recording medium comprises an ink-receiving layer comprising a pigment and an alkali-process gelatin, wherein the alkali-process gelatin has no sol-gel reversibility in an environment of room temperature and has a weight average molecular weight within the range of from 50,000 to 150,000. A coating aqueous dispersion comprises water and has dispersed therein a pigment and the alkali-process gelatin. A process for producing a recording medium comprises the steps of coating on a support at room temperature the coating aqueous dispersion and drying the resulting coating at a high temperature of 80.degree. C. or above. An image forming method comprises ejecting minute droplets of an ink from fine orifices to apply the ink droplets to the recording medium to make a print. A printed material comprises the recording medium.

Recording medium

Recording medium, ink-jet recording method using the same

Disclosed herein is a recording medium having an ink-receiving layer which comprises an alumina hydrate and acid-processed or alkali-processed gelatin.

Recording medium, ink-jet recording method using the same and print

A photosensitive material comprises a photosensitive composition comprising a photosensitive and heat-developable element and a photopolymerizable element. An imagewise unexposed area on the material is polymerized by imagewise exposure, heating and whole areal exposure. The photosensitive and heat-developable element comprises at least a photosensitive silver halide, an organic silver salt and a reducing agent of the formula ##STR1## The photopolymerizable element comprises at least a polymerizable polymer precursor and a photopolymerization initiator. An image forming method comprises the steps; subjecting a photosensitive material in the same layer to imagewise exposure and heating to form an image; and subjecting the resultant photosensitive material to whole areal exposure to polymerize and imagewise unexposed or exposed area thereof.

Photosensitive composition containing photosensitive and heat

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Yokohama, Japan

Kyo Miura