Abstract: An active ray-curable ink comprising a pigment, a photoinitiator, a polymerizable compound, a compound represented by following Formula (1), and a urethane polymer or a urethane oligomer having no photopolymerizable group in a molecule: wherein at least either of R1 and R2 represents an alkoxy group having a carbon number of 4-10; and at least one of R3, R4, R5, and R6 represents an alkyl group, an alkylsulfonyl group, or an alkoxy group having a carbon number of 4-9, and has a secondary or tertiary carbon atom at a binding site to the anthracene ring.

Abstract: A active ray curable ink-jet ink includes a multifunctional acrylate or methacrylate of at least three functional groups, and the acrylate or the methacrylate has a partial structure of the following Formula (1) in an amount of 5-40 weight % based on the total weight of the active ray curable ink-jet ink: Formula (1) —(R—O—)n—, wherein R is an alkylene group, and n is an integer of at least three.

Abstract: An active ray curable ink-jet ink comprising at least an organic pigment, a polymer dispersant, a photo-initiator and a cationic polymerizable compound, wherein the active ray curable ink-jet ink incorporates a quaternary ammonium salt and a content of the quaternary ammonium salt is not less than 5 ppm and not more than 500 ppm.

Abstract: An activated light curable inkjet ink including: a photo-initiator, photo-polymerizable compound dispersant and modified silicone oil, wherein, when 0.1 percent by mass of the modified silicone oil is added to said activated light curable inkjet ink containing no modified silicone oil, a surface tension at 25° C. is reduced by 0 through 3 mN/m.

Abstract: Disclosed is an actinic ray curable ink-jet ink composition containing a photopolymerizable compound, a sulfonium salt (compound A) as a photoinitiator, which does not release benzene on actinic ray exposure, and a compound (compound B) as a sensitizing agent selected from the group consisting of (i) a polycyclic aromatic compound having a hydroxyl group, a substituted or unsubstituted aralkyloxy group or a substituted or unsubstituted alkoxy group, (ii) a carbazole derivative, and (iii) a thioxanthone derivative.

Abstract: An actinic radiation curable magenta ink composition containing a quinacridone series pigment, a dispersing agent, a photo-polymerizable compound and a photo-polymerization initiator, wherein a surface of a coated layer with the magenta ink composition on a porous medium exhibits a 60°-glossiness defined in JIS 5600 in the range of 95 to 140, provided that the coated layer is formed by coating the magenta ink composition with a bar coater on the porous medium having a void ratio of 50 to 70% and a 60°-glossiness defined in JIS K 5600 of 30 or more, and then standing still for 30 minutes.

Abstract: An actinic radiation curable ink-jet ink comprising: a metal complex pigment; a cationically polymerizable compound; a polymer dispersing agent having a basic functional group exhibiting an amine value of 5-40 mg/g; and a photo acid generating agent, wherein the cationically polymerizable compound comprises an oxirane ring. The aforesaid actinic radiation curable ink-jet ink enable to achieve an ink-jet ink exhibiting excellent storage stability, ejection capability, and curability after ejection, and enables formation of highly detailed images which realize high density, uniform glossiness, and excellent color reproduction, and forms no wrinkling, and provide a image forming method using the same.

Abstract: An active ray curable ink-jet ink set comprising an active ray curable yellow ink, an active ray curable cyan ink, an active ray curable black ink, and further one or more active ray curable color inks other than yellow, cyan and black, wherein each of the active ray curable inks contains a photo-polymerization initiator, a photo-polymerizable compound, a pigment, and a dispersing agent which has an amine value and an acid value, provided that the acid value is higher than the amine value, and an average particle diameter of the pigment contained in the yellow ink is larger than that of the pigment in the cyan ink and than that of the pigment in the black ink by 0.025-0.090 ?m, and further the average particle diameter of the pigment contained in each of the inks of the active ray curable ink-jet ink set is 0.070-0.220 ?m.

Abstract: An active ray curable ink-jet ink comprising at least one type of a photo acid generating compound, a cationic polymerizable compound and a pigment, wherein the active ray curable ink-jet ink contains a fatty acid amine salt comprising a fatty acid having a carbon number of 6-18 and a primary, a secondary or a tertiary amine having a carbon number of 4-12 in an amount of 0.01-0.70 weight % based on the total weight of the ink-jet ink.

Abstract: An actinic radiation curable ink comprising: a photopolymerizable compound; and a urethane polymer, wherein a content of isocyanate groups remaining in the urethane polymer is 0.1% or less based on the total number of the isocyanate groups required to prepare urethane polymer in the actinic radiation curable ink.

Abstract: A method of producing an image comprising the steps of: (a) ejecting droplets of at least two actinic radiation curable ink-jet inks from an ink-jet recording head so as to deposit onto a recording medium; and (b) irradiating the deposited droplets of the actinic radiation curable ink-jet inks with actinic radiations, wherein the two actinic radiation curable ink-jet inks being different in hue with each other; and an absolute value of ?S(Slow-Shigh) is 5-1,000 mPa·s, where Slow represents a viscosity of the actinic radiation curable ink-jet ink measured with a share rate of 11.7 l/s at 25° C., Shigh represents a viscosity of the actinic radiation curable ink-jet ink measured with a share rate of 1,000 l/s at 25° C., and ?S(Slow-Shigh) represents a difference between the viscosities of Slow and Shigh.

Abstract: An actinic radiation curable composition, comprising a photo-acid generating agent selected from the group consisting of sulfonium represented by General Formulas (I)–(III).

Abstract: An active ray curable ink-jet ink composition comprising a photo-induced acid generating agent containing an onium salt which does not generate benzene under active ray radiation, and a photopolymerizable compound containing a compound having an oxetane ring in the molecule.

Abstract: A printed mater prepared by jetted ink. The ink is hardened by irradiation of radiation or heat, and the ratio of total thickness of the ink layer to total thickness of the substrate is from 0.40 to 0.05.

Abstract: An active ray curable ink jet solventless ink contains: a bifunctional or higher acrylate compound having a structure expressed by general formula (1) in an amount of less than 35% by mass, and a monofunctional acrylate compound in an amount of 65% by mass or more: wherein the general formula (1) is —(—R—O—)n— where, R represents an alkyl group, and n represents an integer of 1 or larger.

Abstract: Disclosed are an actinic ray curable composition, an actinic ray curable ink, an image recording method, and an ink jet recording apparatus, the actinic ray curable composition containing a photo acid generator, and an oxetane compound I represented by the following formula 1, wherein R1, R2, R3, R4, R5, and R6 independently represent a hydrogen atom, a fluorine atom, an alkyl group having from 1 to 6 carbon atoms, a fluoroalkyl group having from 1 to 6 carbon atoms, an allyl group, an aryl group, a furyl group or a thienyl group, and wherein the longer C—O bond distance of the two C—O bond distances in formula 1 is from 0.1464 to 0.1500 nm.

Abstract: There is provided an image recording device which is compact, high in image recording efficiency, low in power consumption, and capable of recording a good image even on a recording medium made of a heat shrinkable material. In an image recording device 1 which records an image on a recording medium 4 by irradiating it with ultraviolet rays by an ultraviolet-ray irradiation device 20 to cure an ink, an ultraviolet light source comprises a light emitting diode which generates ultraviolet rays having an emission wavelength peak in a range between 305 and 375 nm and a maximum illuminance in a range between 40 and 1000 mW/cm2 on a surface of the recording medium.

Abstract: The present invention relates to an ink-jet recording method including: jetting an active ray-hardenable ink from an ink-jet head onto a recording material; irradiating the jetted active ray-hardenable ink on the recording material with an active ray; and heating the jetted active ray-hardenable ink on the recording material, wherein the active ray-hardenable ink includes an oxetane compound having one oxetane ring in the molecule and an oxetane compound having two or more oxetane rings in the molecule as a photo polymerizable compound.

Abstract: An activated light curable inkjet ink comprising: a photo-initiator, photo-polymerizable compound dispersant and modified silicone oil, wherein, when 0.1 percent by mass of the modified silicone oil is added to said activated light curable inkjet ink containing no modified silicone oil, a surface tension at 25° C. is reduced by 0 through 3 mN/m.

Abstract: An actinic ray curable ink-jet ink including a photoinitiator, a photopolymerizable composition, pigment particles, a dispersing agent having an amine value and an acid value, with the proviso that the amine value is larger than the acid value, wherein the pigment particles has an avergae particle diameter of from 0.08 to 0.25 ?m and a number of the pigment particles having a particle diameter of not less than 1 ?m is less than 6.0×105/?l, the particle diameter being measured with a dynamic light scattering method.