Abstract: An object of the present invention is to provide an active energy ray-curable lithographic printing ink set that is excellent in superimposition of inks, and a method for producing a printed material using the same. The present invention is an active energy ray-curable printing ink set including at least one ink of black or chromatic color including at least any one of a black pigment, a cyan pigment, a magenta pigment, and a yellow pigment, and a white ink including a white pigment, wherein at least one of the ink of black or chromatic color is the black/chromatic ink (1) having a tack value of 5.0 or more and 12.0 or less at 400 rpm measured with an inkometer at 38° C., and the white ink has a tack value of 1.0 or more and 5.0 or less at 400 rpm measured with an inkometer at 38° C.

Abstract: An object of the present invention is to provide a method for producing printed material on which active energy ray-curable ink is printed, the method being capable of improving print density without impairing gradation expressivity. The present invention is a method for producing printed material, the method including, in order: a transfer process of transferring ink to a transfer target surface of a substrate; and an impression process of bringing each of impression cylinders into contact with the transfer target surface to which the ink has been transferred, and at least one of the impression cylinders has a patterned impression part.

Abstract: An object of the present invention is to provide an active energy ray-curable lithographic ink that exhibits good adhesion to a plastic film and does not cause a decrease in the adhesion capability even during hot-water treatment. The present invention encompasses a printing ink that includes (a) a urethane (meth)acrylate and (c) another polymerizable monomer, wherein the printing ink has an ink tack value of 5.0 or more and 18.0 or less and a viscosity (C) and a viscosity (B) that are both 5 Pa·s or more and 100 Pa·s or less, as measured at a rotational speed of 20 rpm and a rotational speed of 50 rpm respectively at 35° C., using a cone-plate rotating viscometer, and wherein the viscosity ratio (B)/(C) is 0.60 or more and 1.00 or less.

Abstract: A problem to be addressed by the present invention is to provide a method of producing a printed material by printing an active energy ray-curable printing ink on a film, wherein the printed material has good adhesion between the ink and the film even after undergoing boiling treatment for boiling sterilization or retorting sterilization. Such a problem is solved by a method of producing a printed material, including the steps of printing an ink on a film; and irradiating the ink-printed face with an active energy ray; wherein the film contains: a polyamide film layer; and a layer that, as the outermost layer of at least one face of the film, contains a polyurethane obtained by use of a polycarbonate polyol as a polyol component.

Abstract: To provide is a manufacturing method for obtaining printed material in which, in lithographic printing, a printed part where multiple colors are superimposed on each other has a high gloss, and also a lithographic printing ink set. The method for manufacturing printed material according to the present invention includes a step of coating at least black ink for lithographic printing, cyan ink for lithographic printing, magenta ink for lithographic printing, and yellow ink for lithographic printing on a substrate, in which a difference in surface tension between the inks to be coated on a substrate is at most equal to 3.5 mN/m. The lithographic printing ink set according to the present invention is a lithographic printing ink set including at least black ink, cyan ink, magenta ink, and yellow ink, in which a difference in surface tension between the inks included in the lithographic printing ink set is at most equal to 3.5 mN/m.

Abstract: An object of the present invention is to provide an active energy ray-curable lithographic ink that exhibits good adhesion to a plastic film and does not cause a decrease in the adhesion capability even during hot-water treatment. The present invention encompasses an active energy ray-curable lithographic ink containing (a) a polyurethane and (b) a polymerizable monomer.

Abstract: To provide is a manufacturing method for obtaining printed material in which, in lithographic printing, a printed part where multiple colors are superimposed on each other has a high gloss, and also a lithographic printing ink set. The method for manufacturing printed material according to the present invention includes a step of coating at least black ink for lithographic printing, cyan ink for lithographic printing, magenta ink for lithographic printing, and yellow ink for lithographic printing on a substrate, in which a difference in surface tension between the inks to be coated on a substrate is at most equal to 3.5 mN/m. The lithographic printing ink set according to the present invention is a lithographic printing ink set including at least black ink, cyan ink, magenta ink, and yellow ink, in which a difference in surface tension between the inks included in the lithographic printing ink set is at most equal to 3.5 mN/m.

Abstract: Provided is active energy ray-curable ink for offset printing which has marked curability and toning resistance during printing, exhibits good transferability and adhesiveness to plastic films having low wettability, and imparts high hiding power to printed matter. The active energy ray-curable ink for offset printing includes a pigment, a polyfunctional (meth)acrylate having a hydroxyl group, and a resin having an ethylenic unsaturated group and a hydrophilic group.