Abstract: To provide an active energy ray-curable ink composition that increase the content of raw materials derived from biomass and contains a material having superior pigment dispersibility, such as a rosin-modified phenol resin. An active energy ray-curable ink composition containing a compound having one or more ethylenically unsaturated bonds, a specific resin, and a specific liquid ingredient is provided, wherein the specific resin is at least one selected from the group consisting of rosin-modified phenol resins, rosin-modified maleic acid resins, rosin-modified alkyd resins, gilsonite resins, and asphalt resins, and the specific liquid ingredient is fat and oil that is derived from animals or vegetables or a modified product thereof having no ethylenically unsaturated bonds and a solubility parameter value (hereinafter referred to as sp value) of 9.0 (cal/cm3)1/2 to less than 11.0 (cal/cm3)1/2 as measured by turbidimetric titration.

Abstract: To provide an active energy ray-curable ink composition that contains high rates of raw materials derived from biomass and can maintain basic characteristics, such as compatibility. Provided is an active energy ray-curable ink composition containing a pigment, a compound having ethylenically unsaturated bonds, and a rosin-modified alkyd resin, wherein the rosin-modified alkyd resin is a condensed polymer of an acid ingredient containing a resin acid, a fatty acid, and a polybasic acid with a polyhydric alcohol, and has a solubility parameter (sp) value of 9.0 to 11.0 (cal/cm3)1/2 as measured by turbidimetric titration and an acid value of 1 to 50 mg KOH/g.

Abstract: An object is to provide a printing ink that has high environmental friendliness and is excellent in quick dry-curability of a coating when a plasma is used as a curing system. A solution is to provide an ink composition for plasma curing including a photocatalyst compound and/or a composite of a metal component and a photocatalyst compound and to provide an additive for an ink composition for plasma curing, the additive including a photocatalyst compound and/or a composite of a metal component and a photocatalyst compound.

Abstract: Disclosed is an ink composition for photo-curable ink jet printing, comprising (A) at least one selected from the group consisting of hexanediol acrylate, 3-methyl-1,5-pentanediol diacrylate, dipropylene glycol diacrylate, and hydroxy pivalic acid neopentyl glycol diacrylate, (B) at least one of vinyl amide monomer and acryloyl amine monomer, (C) an acrylated amine compound having two photopolymerizable functional groups and two amino groups in a molecule, (D) a monofunctional monomer (excluding vinyl amide monomer which is the (B) component), and a photopolymerization initiator, wherein a content of the (A) component is 40 to 70% by mass, wherein a content of the (B) component is 5 to 30% by mass, wherein a content of the (C) component is 0.1 to 15% by mass, and wherein a viscosity is 200 mPa·s or less.

Abstract: Provided is an ink composition for photo-curable inkjet printing, comprising a pigment, a photopolymerizable compound, and a photopolymerization initiator, wherein the photopolymerizable compound comprises 5 to 30% by mass of an amine-modified oligomer and 5 to 30% by mass of N,N-dimethylacrylamide, wherein the photopolymerization initiator comprises at least any one of ethoxy(2,4,6-trimethylbenzoyl)phenylphosphine oxide and bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide, and wherein a total amount of ethoxy(2,4,6-trimethylbenzoyl)phenylphosphine oxide and bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide is 12% by mass or less.

Abstract: An inkjet printing device for multi-color printing includes: multi-color inkjet nozzles that move in the direction perpendicular to the moving direction of the target base printing material and also in the direction parallel to the surface of the target base printing material; plasma ejection ports provided downstream of the multi-color inkjet nozzles in a manner oriented facing the surface of the multiple colored inks printed on the target base printing material; and an electron beam irradiation part located on the downstream side of the inkjet nozzles and plasma ejection ports, in a manner oriented facing the printed surface of the target base printing material.

Abstract: An object is to achieve both good washing fastness and texture by combining a urethane resin of high fracture elongation with a small quantity of crosslinking agent. As a means for achieving the object, a white inkjet ink composition for textile printing is provided that contains a white pigment, a water-dispersible urethane resin having reactivity to cationic compounds, a crosslinking agent, a water-soluble organic solvent, and water; wherein the crosslinking agent is contained by 0.02 to 0.15 parts by mass relative to 1 part by mass of the water-dispersible urethane resin, and as the water-soluble organic solvent, a glycol ether that dissolves by 1 to 60 g in 100 g of water is contained.

Abstract: A plasma-curable ink composition for offset printing having high reactivity with plasma and capable of being hardened into a sufficiently dried state even in the use of plasma generated by a remote-type plasma generator, and a method for producing printed matter and a method for printing information using the same. The plasma-curable ink composition for offset printing comprises a pigment, a binder resin, and at least one specific ingredient selected from the group consisting of castor oil, polymerized oil, and alkyd resins having an acid value of 10 mg KOH/g or more.

Abstract: An object is to achieve both good washing fastness and texture by combining a urethane resin of high fracture elongation with a small quantity of crosslinking agent. As a means for achieving the object, an inkjet ink composition for textile printing is provided that contains a pigment, a water-dispersible resin, a crosslinking agent, and water; wherein, as the water-dispersible resin, a resin of 1200 to 1800% in fracture elongation and 10 to 48 MPa in tensile strength is contained by 1.0 to 3.0 parts by mass relative to 1 part by mass of the pigment, and the crosslinking agent is contained by 0.03 to 0.17 parts by mass relative to 1 part by mass of the water-dispersible resin.

Abstract: An object is to obtain a photocurable inkjet printing ink composition that demonstrates excellent preservation stability and discharge stability, good adhesion, bending tolerance property, and tackiness, and high hardness. As a solution, a photocurable inkjet printing ink composition containing photopolymerizable compounds and photopolymerization initiator is provided, wherein the photocurable inkjet printing ink composition satisfies the requirements of A to E: A. 3,3,5-trimethyl cyclohexyl acrylate is contained by 5 to 50 percent by mass in all photopolymerizable compounds; B. multifunctional monomers and/or multifunctional oligomers of 10° C. or lower in glass transition temperature are contained by 1 to 15 percent by mass in all photopolymerizable compounds; C. monofunctional monomers are contained by a total of 40 percent by mass or more in all photopolymerizable compounds; D. amino group and/or amide group-containing monomers and/or oligomers are contained; and E.

Abstract: An object is to improve the lamination strength and anti-blocking suitability of matters printed with an aqueous white inkjet ink composition containing titanium oxide, etc., on polyethylene terephthalate, polypropylene, nylon, and other resin films. As a means for achieving the object, an ink set is provided that includes a combination of: an aqueous primer composition containing an acrylic resin and/or vinyl acetate resin, and a calcium salt; and an aqueous white inkjet ink composition containing a polyester polyurethane resin emulsion with a rate of elongation of 500 to 1500% by 0.1 to 10.0 percent by mass in solids content in the aqueous white inkjet ink composition, a wax emulsion, and a titanium oxide.

Abstract: Provided is an active energy ray-curable ink composition for offset printing capable of achieving superior gloss of printed matter. The ink composition comprises a compound having at least one ethylenically unsaturated bond and a photopolymerization initiator, wherein a group of materials having no ethylenically unsaturated bonds, having a specified SP value, and exhibiting a liquid state at room temperature is added to the ink composition up to the upper limit depending on the SP value. Examples of such a group of materials include castor oil, hardened castor oil, polymerized castor oil, coconut oil, palm kernel oil, epoxidized fats and oils, alkylphenols having C15-C18 alkyl groups, cashew nut shell liquid, polymers of cashew nut shell, and modified derivatives of cashew nut shell liquid.

Abstract: An object is to improve the dispersion stability and discharge stability, while also improving the image quality and various resistance properties of printed matters even when the cohesion promoter contained in the primer ink is small in quantity. As a means to achieve the object, an ink set is provided that comprises: an aqueous inkjet ink composition containing (a) a pigment, (b) a water-soluble organic solvent, (c) water, and (d) a resin emulsion, wherein the pigment (a) has a crosslinked resin layer on its surface; and a primer ink composition containing a cohesion promoter that promotes cohesion of the aforementioned ink composition.

Abstract: A printing apparatus is provided that has: a printing part that performs printing by depositing a recording composition on the surface of a printing medium; a plasma generation part that is constituted by a plasma generation chamber having an introduction port for introducing a gaseous flow of plasma material gas to the interior, wherein the plasma material gas is converted to a plasma in the interior to form a gaseous flow of plasma-modified gas, as well as a plasma release port for releasing the gaseous flow to the exterior; and a plasma irradiation part that brings a gaseous flow released from the plasma release port, which contains the plasma-modified gas and/or plasma-quenched gas formed therefrom, in contact with the surface of the printing medium that has been printed at the printing part. The printing apparatus can fully dry/cure a printed recording composition.

Abstract: Clear inks are prone to heat-induced micro-gelling that can cause their storage stability to drop, and micro-gelling may also occur in clear inks with the passage of time, in which case their inkjet discharge property may drop. As a solution, a photocurable clear ink composition for inkjet printing is provided, which contains a photopolymerizable compound, a photopolymerization initiator, and an inorganic filler of 1 to 200 nm in average grain size accounting for 0.05 to 5.0 percent by mass in the composition, and whose visible light transmission factor is 30% or higher.

Abstract: An object of the present invention is to provide a nonaqueous ink composition offering excellent adhesion to printing media, rub resistance, and solvent resistance, even when printed on roll materials (acrylic, PET, etc.), board materials (glass, plastics, etc.), and other nonabsorbent media, even in a high-speed printing mode, while also exhibiting excellent discharge stability. As a solution, a nonaqueous ink composition containing a chlorinated polyolefin resin and a ketone resin is provided, wherein the chlorinated polyolefin resin and ketone resin together account for at least 10 percent by mass in the ink composition, the chlorine content in the chlorinated polyolefin resin is 30 to 50 percent by mass, and the chlorinated polyolefin resin and ketone resin are contained at a ratio by mass, calculated by “Chlorinated polyolefin resin/Ketone resin,” of 3/7 to 7/3.

Abstract: An object is to provide an ink composition for inkjet printing that permits inkjet printing, particularly on metal surfaces, wherein such ink composition possesses sufficiently high adhesion and heat resistance with respect to metal surfaces. As a means for achieving the object, a photocurable inkjet printing ink composition is provided, which contains, relative to the entire ink composition, 0.1 percent by mass or more of an acid-modified acrylic monomer and 10 to 30 percent by mass of a monofunctional monomer with a Tg of 100° C. or above, wherein the monofunctional monomer accounts for 80 percent by mass or more of all monomers.

Abstract: An object of the invention is to provide a yellow ink composition for nonaqueous inkjet that achieves excellent density and weather resistance on printed matters whose printing surface is constituted by a polyvinyl chloride polymer, ethylene-vinyl acetate copolymer, or other vinyl polymer or the like, while also ensuring excellent discharge stability, even in a high-speed printing mode. To this end, a yellow ink composition for nonaqueous inkjet is provided that contains, as the pigment, C. I. Pigment Yellow 150 and C. I. Pigment Yellow 83 at a ratio by mass, calculated by “C. I. Pigment Yellow 150/C. I. Pigment Yellow 83,” of 5/5 to 9/1, and further contains a pigment dispersant, a resin, and an organic solvent.

Abstract: The present invention provides an active energy ray-curable ink composition for offset printing which can maintain excellent drying characteristics with a small dose of UV light. An active energy ray-curable ink composition for offset printing comprising a compound having an ethylenically unsaturated bond, a photopolymerization initiator, and an epoxidized fat or oil is used. Although epoxidized fat or oil is not polymerized through radical polymerization, the present inventors, who have conducted research, have revealed that the reactivity of a radically polymerizable ink composition is increased through addition of epoxidized fat or oil thereto.

Abstract: The present invention provides an active energy ray-curable ink composition for offset printing which can maintain excellent drying characteristics with a small dose of UV light. An active energy ray-curable ink composition for offset printing comprising a compound having an ethylenically unsaturated bond, a photopolymerization initiator, and an epoxidized fat or oil is used. Although epoxidized fat or oil is not polymerized through radical polymerization, the present inventors, who have conducted research, have revealed that the reactivity of a radically polymerizable ink composition is increased through addition of epoxidized fat or oil thereto.