Toyo Ink Sc Holdings Co., Ltd.

Toyocolor Co., Ltd

Toyo Ink Co., Ltd.

Artience Co., Ltd.

Toyo Ink Manufacturing Company

Toyo Ink Mfg. Co., Ltd.

Atsushi Yoda

Kazuhiro Jonai

Masahiro Sugihara

Norio Suzuki

Mayuko Okamoto

Yoshihito Suzuki

Masayoshi Utsugi

Kazunori Shigemori

Yukitoshi Takahashi

Daisuke Fujiwara

Satoshi Washio

Seiji Aida

Kaori Nakano

Yuji Kameyama

Mitsuo Umezawa

Ken Yamasaki

Takaaki Koike

Atsushi Nakazato

Mayuko Hayamizu

Ken Yamazaki

Yoshiyuki Sakai

Sachiko Kinoshita

Yasushi Ariyoshi

Akiko Nishina

Tomoko Tachibana

Tsutomu Hiroshima

Natsuko Kokubo

Joji Mikami

Mutsuko Masatoki

Yasutaka Itimura

Masataka Utsugi

Kouhei Yamada

An embodiment relates to an inkjet ink containing a mixed crystal pigment including two or more naphthol-based azo pigments, a binder resin (a-1) having an acid value of 1 to 80 mgKOH/g, a surfactant, and a water-soluble organic solvent, in which the amount of a water-soluble organic solvent having a boiling point of 240° C. or more at 1 atmosphere is 8% by mass or less relative to the total amount of the water-based inkjet ink.

Water-based inkjet ink and method for producing inkjet printed material

One embodiment relates to a water-based inkjet yellow ink containing a yellow pigment (A) having a specific partial structure, an organic solvent, a basic organic compound, and water, wherein an amount of the yellow pigment (A) is 1 to 10% by mass of a total mass of the water-based inkjet yellow ink, the basic organic compound contains 0.1 to 1.25% by mass of a basic organic compound (B) having a pKa value of 9.5 or less at 25° C. of the total mass of the water-based inkjet yellow ink, and an amount of an organic solvent having a boiling point of 240° C. or higher under 1 atmosphere is 5% by mass or less of the total mass of the water-based inkjet yellow ink.

Water-based inkjet yellow ink, ink set, and method for producing printed matter

One embodiment relates to a water-based ink for an inkjet containing a pigment, a fixing resin, an organic solvent and water, wherein the fixing resin includes an A-B block polymer having an A block and a B block, the A block contains a structural unit (P-1) having an anionic functional group, and the acid value of the A-B block polymer is from 5 to 80 mgKOH/g.

Water-based ink for inkjet and method for producing printed matter

An ink set including an inkjet ink, and a treatment liquid used in combination with the inkjet ink, wherein the inkjet ink includes a pigment, a water-soluble organic solvent, a surfactant and water, the treatment liquid includes a coagulant, an organic solvent and water, the coagulant includes calcium nitrate in an amount of 21.5 to 41.7% by mass relative to the total mass of the treatment liquid, an amount of organic solvent having a boiling point at one atmosphere of 240&#xb0; C. or higher in the treatment liquid is not more than 8% by mass, a pH of the treatment liquid is within a range from 3.5 to 10.5, and a viscosity of the treatment liquid at 25&#xb0; C. is within a range from 5.5 to 18.5 mPa&#xb7;s.

Ink set and method for recording printed matter

An ink set containing an inkjet ink and a treatment liquid, wherein the inkjet ink contains a pigment, a water-soluble organic solvent, a surfactant and water, the water-soluble organic solvent contains an alkyl diol (A) of 2 to 8 carbon atoms, the weighted average boiling point of the water-soluble organic solvent at one atmosphere is from 175 to 240&#xb0; C., the surfactant contains an acetylenediol-based surfactant, the treatment liquid contains a coagulant, calcium nitrate is included as the coagulant in an amount of 6.8 to 20.8% by mass relative to the total mass of the treatment liquid, and the pH of the treatment liquid is from 2 to 11.

Ink set and method for producing printed matter

The invention provides a magenta ink for inkjet which yields distinct images having high gloss and no density irregularities or voids upon inkjet printing onto low-absorption substrates, exhibits excellent discharge stability after long standby periods, and can provide excellent drying properties even during high-speed printing; and also provides an ink set that can suppress mixed color bleeding and achieve superior color reproducibility.

Magenta ink for inkjet

One embodiment relates to an aqueous inkjet ink containing a pigment (A), a polymer compound (B), a water-soluble organic solvent (C) and a surfactant (D), wherein the water-soluble organic solvent (C) includes ethylene glycol and/or 1,3-propanediol (c1), and a water-soluble organic solvent (c2) having a specific static surface tension, the acid value of the polymer compound (B), the amount of water-soluble organic solvent having a boiling point at 1 atmosphere of 240&#xb0; C. or higher, and the weight average boiling point at 1 atmosphere for the water-soluble organic solvent (C) are all prescribed values, and the blend amounts of the various components satisfy specific relationships.

Aqueous inkjet ink and method for producing printed item

An ink set containing an inkjet ink and a treatment liquid used in combination with the inkjet ink, wherein the inkjet ink contains a pigment, a water-soluble organic solvent, a surfactant and water, the water-soluble organic solvent contains a glycol ether-based organic solvent having a specific structure, the treatment liquid contains a coagulant, the coagulant contains calcium nitrate in an amount of 6.8 to 20.8% by mass relative to the total mass of the treatment liquid, and the amount of compounds contained in the treatment liquid that have three or more hydroxyl groups is not more than 15% by mass relative to the total mass of the treatment liquid.

One embodiment relates to a water-based inkjet ink containing at least water, a pigment, a water-soluble organic solvent and a binder resin, wherein the water-soluble organic solvent contains at least a water-soluble organic solvent having a surface tension of 30 to 50 mN/m and a boiling point at 1 atmosphere of 180 to 230&#xb0; C., in an amount of 15 to 50% by weight relative to the total weight of the water-based inkjet ink, and the acid value of the binder resin is at least 5 mgKOH/g but less than 60 mgKOH/g.

Water-based inkjet ink and production method for printed matter

A pretreatment solution which is used together with an aqueous inkjet ink that contains at least a pigment, wherein the pretreatment solution contains an inorganic metal salt and/or an organic metal salt that exists in a dissolved state, and an organic solvent, the organic solvent contains a compound having one or more hydroxyl groups in each molecule, and the amount of the organic solvent is from 0.1 to 50% by weight based on the total weight of the pretreatment solution.

Pretreatment solution, ink set and method for producing printed matter

Provided is an inkjet pigment ink which contains a pigment that is selected from the group consisting of C.L. Pigment Yellow 74 having a transmittance of 70% or more, C.I. Pigment Red 269 having a transmittance of 70% or more, C.I. Pigment Red 122 having a transmittance of less than 70% and C.I. Pigment Yellow 150; a water-soluble solvent that is selected from the group consisting of glycol ethers and diols; water; and a pigment dispersing resin that is a copolymer which contains a monomer A, a monomer B and a monomer C as unit components. The monomer A is an alkyl (meth)acrylate ester; the monomer B is styrene, &#x3b1;-methyl styrene or benzyl (meth)acrylate; and the monomer C is (meth)acrylic acid.

Inkjet pigment ink

An aqueous inkjet ink composition comprising a pigment, a pigment-dispersing resin, resin fine particles (A), water, and hydrophilic solvents (B), the resin fine particles (A) being formed by emulsion polymerizing ethylenically unsaturated monomers including: 20% to 80% by weight of an aromatic ethylenically unsaturated monomer (C) that does not have an ionic functional group; 0.6% to 6% by weight of water-soluble ethylenically unsaturated monomers (F) consisting of 0.5% to 3% by weight of a sulfonic acid group-containing ethylenically unsaturated monomer (D) and 0.1% to 3% by weight of a nonionic water-soluble ethylenically unsaturated monomer (E); and 0.1% to 10% by weight of a crosslinkable ethylenically unsaturated monomer (G), and the hydrophilic solvents (B) including a glycol-based solvent (H) and an ethylene glycol ether-based solvent (I) is provided.

Aqueous inkjet ink composition

A non-aqueous ink jet which has less bad odor, has excellent safety and sanitariness, excellent resin dissolvability, excellent printing stability and excellent dryability, causes no corrosion of printers, and has good adhesiveness to non-absorbent substrates, and an ink set are provided. In the non-aqueous inkjet ink comprising a pigment, a resin and a mixed solvent, the mixed solvent comprises diethylene glycol dialkyl ether and tetraethylene glycol dialkyl ether.

Nonaqueous inkjet ink and ink set

A dispersing agent characterized in that said dispersing agent is prepared by reacting primary and/or secondary amino groups of an amine compound comprising a polyamine (C) with isocyanate groups of a urethane prepolymer (E) having two isocyanate groups in one terminal region, wherein said urethane prepolymer (E) has been prepared by reacting hydroxyl groups in a vinyl polymer (A) having two hydroxyl groups in one terminal region with isocyanate groups in diisocyanates (B), and in that an amine number of said dispersing agent is 1 to 100 mgKOH/g is disclosed. The dispersing agent of the present invention has excellent dispersibility, flowability, and storage stability when used in small quantities. A pigment-dispersed product can be prepared therefrom, independently of the kinds of binder resin or solvent used. Further, the present invention is suitable for offset ink, gravure ink, resist ink for a color filter, inkjet ink, coating composition, and colored resin composition.

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Tokyo, Japan

Atsushi Yoda