Konica Minolta, Inc.

Konica Corporation

Konica-Minolta Holdings, Inc.

Konica Minolta Medical and Graphic, Inc.

Katsunori Goi

Narito Goto

Toshiyuki Takabayashi

Masashi Ikeda

Hirotaka Iijima

Mamoru Umeki

Hajime Kobayashi

Nobuaki Tsuji

Hitoshi Morimoto

Tetsuo Shima

Hitoshi Ohkubo

Ryo Aoyama

Masahiko Taguchi

Wataru Tachikawa

Ink sets comprising an ink set A which comprises a yellow ink, a magenta ink, a cyan ink, and a black ink and an ink set B which comprises at least two inks selected from among an orange ink, a green ink, a violet ink, and a blue ink. In the ink set B, the orange ink contains an orange pigment having a cyclic structure and a basic moiety in the cyclic structure, the green ink contains a green pigment having a copper phthalocyanine structure, and the violet ink contains a violet pigment having a dioxazine skeleton. The inks included in the ink set A and ink set B each contain, as a gellant, at last one compound selected from among compounds represented by R1-CO&#x2014;R2 (general formula (G1)) and compounds represented by R3-COO&#x2014;R4 (general formula (G2)). In the general formulae (G1) and (G2), R1 to R4 each independently represent a Cchain hydrocarbon group.

Ink sets and ink-jet recording method

Through the active-light-ray-curable inkjet white ink according to the present invention, the ink including a pigment, a dispersing agent, a wax, a photopolymerizable compound, and a photopolymerization initiator, and being capable of a sol-gel phase transition by a temperature change, the pigment including titanium dioxide surface-coated with alumina, the content of the titanium dioxide being 10% by mass to 15% by mass of the total mass of the ink, the ink including sodium ions in a mass ratio of 200 ppm or lower with respect to the pigment, and the dispersing agent including a comb-shaped block copolymer having a tertiary amine group, even when titanium dioxide is used as the pigment, the viscosity of the ink can be restrained from increasing, luster equivalent to that of another color is obtained, and clogging of a recording head for ink discharge is reduced.

Active-light-ray-curable inkjet white ink and image forming method

An active light beam-curable inkjet magenta ink, wherein the ink comprises at least a pigment, a polymer dispersing agent, a crystalline gelling agent, a photopolymerizable compound and a photopolymerization initiator, the pigment is a solid-solution of PV19 and PR202 which has been subjected to surface treatments with alumina and sulfonic acid, the impart amount of the alumina with respect to the pigment is from 1,500 to 7,500 ppm by mass ratio, and the content of the crystalline gelling agent is from 1.5 to 3.0% by mass with respect to the entirety of the ink has fine storage stability and pinning property, and has a small gloss difference from other colors.

Active light beam-curable inkjet magenta ink and inkjet recording method

A black ink for ink-jet printing comprising: a) a carbon black pigment exhibiting a DBP oil absorption of not more than 150 cm/100 g and a pH of more than 6, b) a solvent exhibiting a surface tension of 25-40 mN/m at 25 &#xb0; C. a viscosity of 1-50 mPa&#xb7;s at 25 &#xb0; C. and a vapor pressure of not more than 133 Pa at 25 &#xb0; C. a solvent content of which being not less than 50 weight % and not more than 90 weight % based on the total ink weight, and c) water, the content of which being not less than 10 weight % and less than 45 weight %.

Black Ink for ink-jet printing

Several sheets of sheet-shaped photosensitive materialare stacked on a paper tray containerprepared by press-forming stencil paper sheet, the photosensitive materialstacked on said paper tray container is inserted into a moisture-proof and light-shielding bagmade of a photosensitive material packaging material having moisture-proof and light-shielding properties and having an aluminum thin foil layer, and the moisture-proof and light-shielding bagis sealed tight under a reduced pressure vacuum.

Method of manufacture of photosensitive material packaging body and photosensitive material packaging body

The problem of the present invention is to clear the packaging material and the presence/absence detecting method of the residual photothermographic image recording sheet, which are improved so that the concave section or the notched section provided on the bottom plate does not exercise a bad influence, caused by the exhalation of the organic solvent, on the recording sheet stacked on the lowermost position. Packaging material of the recording sheets, having a detecting means of the recording sheet, wherein there is provided the concave section or the notched section on a section where a part of a vacuum head comes into contact with a bottom plate located on a bottom section of the packaging material, and wherein there is arranged a filler formed with a soft material having air permeability and neither absorbs nor transmits organic solvent, in the concave section or the notched section.

Packaging material of photothermographic image recording sheet and detecting method of presence/absence of residual photothermographic image recording sheet

A polymer resin packaging material for a photographic light sensitive material is disclosed, the packaging material comprising at least one heat seal layer consisting of a polymer resin prepared by polymerizing an ethylenically unsaturated monomer in the presence of a metallocene catalyst, the polymer resin containing a lower molecular weight polymer in an amount of 3 weight % or less.

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Kanagawa, Japan

Katsunori Goi