Abstract: Provided are a planographic printing plate precursor including a support and an image recording layer formed on the support, in which the image recording layer contains a polymer A which includes a constitutional unit A1 having an ethylenically unsaturated group, a weight-average molecular weight of the polymer A is in a range of 2,500 to 35,000, and a content of the constitutional unit A1 in the polymer A is 15 mol % or more, and a method of producing a planographic printing plate using the planographic printing plate precursor.

Abstract: Provided are a lithographic printing plate precursor including an image recording layer on a support, in which a hydrophobic area is existed at at least a part of a surface of an outermost layer on a side where the image recording layer is provided and an occupation area ratio of the hydrophobic area in the surface of the outermost layer is more than 20% by area and less than 100% by area; and a method of producing a lithographic printing plate using the lithographic printing plate precursor.

Abstract: Provided are a planographic printing plate precursor having an image recording layer on a support, and an overcoat layer in this order, in which the overcoat layer includes particles, the overcoat layer is an outermost layer, and an occupation area ratio of the particles in a surface of the overcoat layer is 30% by area or more; and a method of producing a planographic printing plate obtained by using the planographic printing plate precursor.

Abstract: Provided is a lithographic printing plate precursor having: a support; and an image-recording layer as an outermost surface layer on the support, in which the image-recording layer includes a hydrophilic polymer, an ion intensity derived from the hydrophilic polymer has a maximum value I1, the ion intensity being measured by a time-of-flight secondary ion mass spectrometry in such a manner that cutting is carried out from an image-recording layer surface in a direction of the support by an Ar gas cluster ion beam method, a ratio d0/d1 of a thickness d0 of the image-recording layer to a depth d1 from an outermost layer at which the I1 is obtained is 2.0 or more, and a ratio I1/I0 of the I1 to an ion intensity I0 derived from the hydrophilic polymer at a depth from the outermost layer of the d0 is 1.5 or more.

Abstract: A lithographic printing plate precursor including an image recording layer containing an infrared absorber represented by Formula I, on a support, and a method of producing a lithographic printing plate and a lithographic printing method using the lithographic printing plate precursor.

Abstract: Provided are a lithographic printing plate precursor having a support, an image recording layer, and an overcoat layer in this order, in which the overcoat layer includes a water-soluble polymer and particles, a melting point of the particles is in a range of 70° C. to 150° C., and a volume average particle diameter of the particles is greater than 0.7 ?m and a method of producing a lithographic printing plate obtained by using the lithographic printing plate precursor.

Abstract: Provided is a lithographic printing plate precursor having: a support; and an image-recording layer as an outermost surface layer on the support, in which the image-recording layer includes a hydrophilic polymer, an ion intensity derived from the hydrophilic polymer has a maximum value I1, the ion intensity being measured by a time-of-flight secondary ion mass spectrometry in such a manner that cutting is carried out from an image-recording layer surface in a direction of the support by an Ar gas cluster ion beam method, a ratio d0/d1 of a thickness d0 of the image-recording layer to a depth d1 from an outermost layer at which the I1 is obtained is 2.0 or more, and a ratio I1/I0 of the I1 to an ion intensity I0 derived from the hydrophilic polymer at a depth from the outermost layer of the d0 is 1.5 or more.

Abstract: Provided are a lithographic printing plate precursor having an image-recording layer on an aluminum support, in which the image-recording layer contains a polymerization initiator, an infrared absorber, a polymer particle, and a polymerizable compound, and the polymerizable compound has a) a molecular weight of 1,500 to 3,000, b) a double bond equivalent of 200 or less, and c) a CLog P of 9 or less and a method for producing a lithographic printing plate in which the lithographic printing plate precursor is used.

Abstract: Provided are a lithographic printing plate precursor having an image-recording layer on a hydrophilic support, in which the image-recording layer includes an organic polymer particle, and the organic polymer particle is a reaction product obtained by at least reacting an aromatic polyvalent isocyanate compound having a structure represented by Formula PO and water, a method for making a lithographic printing plate having excellent printing resistance in the case of using an ultraviolet-curable ink in printing, a new organic polymer particle, and a resin composition including the organic polymer particle.

Abstract: An acylphosphine oxide compound represented by Formula 1-1 or Formula 2-1 which can be used as a photopolymerization initiator. In Formula 1-1 and Formula 2-1, A represents an m-valent group, L's each independently represent a single bond or a divalent linking group, R1's each independently represent an alkyl group having 1 to 8 carbon atoms, an aryl group having 6 to 20 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, R2 and R3 each independently represent an alkyl group, an aryl group, or an alkoxy group, m represents an integer of 3 or more, n1's each independently represent an integer of 0 to 4, and n2's each independently represent an integer of 0 to 5.

Abstract: An ink jet recording method includes the steps of ejecting an active-radiation-curable ink composition onto a recording medium by an ink jet process and curing the ejected ink composition by irradiation with active radiation. During transporting of the recording medium in the ejecting and curing steps, an unwinding stress in the recording medium is larger than a winding stress in the recording medium. The recording medium has a thickness of 10 ?m to 100 ?m. Also provided is a method for manufacturing laminated printed matter using printed matter produced by the ink jet recording method.

Abstract: A method for manufacturing laminated printed matter includes the steps of ejecting, by an ink jet process, a colorant-containing active-radiation-curable ink composition onto a recording medium; ejecting, by an ink jet process, a colorant-free or white-pigment-containing active-radiation-curable ink composition into a non-image area adjoining an image area formed by the colorant-containing ink composition; curing the ejected colorant-containing ink composition and the ejected colorant-free or white-pigment-containing ink composition by irradiation with active radiation to form an image layer; and laminating a lamination film on a surface on which the image layer has been formed. Laminated printed matter has, in sequence, an image layer and a lamination film. The image layer is composed of an image area and a non-image area. The non-image area is formed of a cured product selected from the group consisting of transparent cured products and white cured products.

Abstract: An actinic-ray-curable ink composition is provided, the composition including: a di(meth)acrylate having a linear alkylene group; a di(meth)acrylate having an alkylene oxide chain; a cyclohexyldienone-based polymerization inhibitor that includes at least one selected from the group consisting of a compound represented by Formula (1) below and a compound represented by Formula (2) below; and a photopolymerization initiator, in which, in Formula (1), R1a and R1b each independently represent an alkyl group having 1 to 8 carbon atoms, R1c represents a phenyl group or a cyclohexyl group, and in which, in Formula (2), R2a, R2b, R2c, and R2d each independently represent an alkyl group having 1 to 8 carbon atoms.

Abstract: An inkjet ink composition includes a maleimide-styrene copolymer having an ammonium salt structure as a Component A, an N-vinyl compound as a Component B, a colorant as a Component C, and a photopolymerization initiator as a Component D. An inkjet recording method includes discharging an inkjet ink composition onto a resin sheet by an inkjet method, and curing the inkjet ink composition by irradiating the discharged inkjet ink composition with actinic radiation.

Abstract: A photopolymerization initiator is an acylphosphine oxide compound represented by Formula 1-1 or Formula 2-1. A polymerizable composition or an ink jet recording method is a polymerizable composition or an ink jet recording method in which the photopolymerization initiator is used. In addition, an acylphosphine oxide compound represented by Formula 1-1 or Formula 2-1 which can be preferably used as the photopolymerization initiator. In Formula 1-1 and Formula 2-1, A represents an m-valent group, L's each independently represent a single bond or a divalent linking group, R1's each independently represent an alkyl group having 1 to 8 carbon atoms, an aryl group having 6 to 20 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, R2 and R3 each independently represent an alkyl group, an aryl group, or an alkoxy group, m represents an integer of 3 or more, n1's each independently represent an integer of 0 to 4, and n2's each independently represent an integer of 0 to 5.

Abstract: A lithographic printing plate precursor including an image recording layer containing an infrared absorber represented by Formula I, on a support, and a method of producing a lithographic printing plate and a lithographic printing method using the lithographic printing plate precursor.

Abstract: A photopolymerization initiator which is a compound having a structure in which one or more carbonyl groups that link to a carbon atom are further directly bonded to an aromatic ring of an aromatic acyl group that bonds to a phosphorus atom in an acylphosphine oxide structure. A producing method of a photopolymerization initiator produces the photopolymerization initiator. In a polymerizable composition and an ink jet recording method, the photopolymerization initiator is used. Furthermore, an acylphosphine oxide compound has a partial structure represented by Formula 1 or Formula 2.

Abstract: An undercoat composition comprises an isocyanate group-containing compound as Component A, a radically polymerizable monomer containing at least b1 or b3 below as Component B, and a photopolymerization initiator as Component C, wherein the total content of b1 and b2 is 50 to 90 mass % relative to the total solids content mass of the undercoat composition, and the total content of b1 and b3 is 5 to 90 mass % relative to the total solids content mass of the undercoat composition, b1: a polyfunctional radically polymerizable monomer having a Log P value of no greater than 2.0, b2: a polyfunctional radically polymerizable monomer having a Log P value of greater than 2.0, and b3: a monofunctional radically polymerizable monomer having a Log P value of no greater than 2.0.

Abstract: An inkjet ink composition of the present invention that comprises (Component A) a maleimide-styrene copolymer having an ammonium salt structure, (Component B) an N-vinyl compound, (Component C) a colorant, and (Component D) a photopolymerization initiator.

Abstract: A radiation-curable ink composition comprises a polymerizable compound as Component A; a photopolymerization initiator as Component B; and two or more types of surfactants as Component C, wherein Component C comprises at least a surfactant that has a polymerizable group and a surfactant that does not have a polymerizable group, and the mass ratio of a content C1 of the surfactant that has a polymerizable group and a content C2 of the surfactant that does not have a polymerizable group is C1:C2=35:1 to 1:10.