Abstract: An ink jet method includes a step of adhering ink jet compositions containing colorants and polymerizable compounds to be cured with radioactive rays to a recording medium by one printing operation, and the ink jet compositions includes an orange ink composition and a red ink composition.

Abstract: A printing method is used for printing a shrink film with radiation-curable ink. The printing method includes forming an image on the shrink film with a first radiation-curable ink by an ink jet method, and forming a fixing pattern by applying a second radiation-curable ink onto a surface of the shrink film that is to come into contact with an object to be wrapped with the shrink film.

Abstract: An ink jet process includes an ejection step, in which a radiation-curable ink jet composition is ejected from an ink jet head to a recording medium, and a curing step, in which the ejected ink jet composition is irradiated with radiation to give a cured coating of the ink jet composition. The ink jet composition contains at least one polymerizable compound, at least one photopolymerization initiator, and C.I. Pigment Red 57:1. The C.I. Pigment Red 57:1 constitutes 4.0% by mass or more of the total amount of the ink jet composition, and the cured coating has a maximum thickness of 5 ?m or less.

Abstract: There is provided a maintenance liquid, which is used in maintenance of a device equipped with a discharge head for discharging an ultraviolet ray curable-type composition containing the acyl phosphine oxide-based photopolymerization initiator toward an attachment object, including a polymerizable compound in which a saturation solubility of an acyl phosphine oxide-based photopolymerization initiator at 20° C. is equal to or greater than 5.0% by mass.

Abstract: A method for producing a printed material includes an application step of applying a radiation-curable ink composition onto a shrink film, and a curing step of irradiating the radiation-curable ink composition on the shrink film with radiation to form a cured ink coating, thus obtaining a printed material. The radiation-curable ink composition contains one or more polymerizable compounds whose weighted average glass transition temperature is 20° C. to 70° C.

Abstract: There is provided a maintenance liquid, which is used in maintenance of a device equipped with a discharge head for discharging an ultraviolet ray curable-type composition containing the acyl phosphine oxide-based photopolymerization initiator toward an attachment object, including a polymerizable compound in which a saturation solubility of an acyl phosphine oxide-based photopolymerization initiator at 20° C. is equal to or greater than 5.0% by mass.

Abstract: An ink jet recording method is a method including a jetting step of jetting a radiation-curable ink jet composition to adhere to a recording medium that shrinks when heated, and a curing step of curing the radiation-curable ink jet composition by irradiating the radiation-curable ink jet composition adhered to the recording medium with radiation, in which the recorded material has a first region and a second region where shrinkage ratios due to the heating in a main surface direction are different when the recorded material is shrunk by being heated and brought into close contact with a packaged object, the shrinkage ratio of the first region in the main surface direction is greater than the shrinkage ratio of the second region in the main surface direction, and the radiation-curable ink jet composition adheres to the recording medium such that a film thickness of a cured film formed in the first region is less than a film thickness of a cured film formed in the second region.

Abstract: A method for manufacturing a recorded matter includes: a first ejection step of ejecting a first ink which is a radiation curable ink jet composition; a first emission step of emitting radioactive rays to form a cured coating film of the first ink; a second ejection step of ejecting a second ink which is a radiation curable ink jet composition; a second emission step of emitting radioactive rays to cure the second ink; and a lamination step of laminating the recorded matter such that a recording surface and a non-recording surface face each other. In addition, the first ink contains a polymerizable compound including a monofunctional monomer, a content of the monofunctional monomer with respect to a total mass of the polymerizable compound contained in the first ink is 80 percent by mass or more, the first ink is a non-white ink, and the second ink is a white ink containing a titanium oxide.

Abstract: An ink jet recording method is a method in which a cyan ink, a magenta ink, a black ink, and a yellow ink radiation that are curable inks are ejected from ink jet heads to attach the radiation curable inks to a recording medium. The method includes, in this order, a first step of attaching the cyan ink, the magenta ink, and the black ink onto the recording medium and applying temporary curing radiation to the recording medium and a second step of attaching the yellow ink onto the recording medium and applying full curing radiation to the recording medium without applying the temporary curing radiation.

Abstract: A radiation curable ink jet composition includes polymerizable compounds and a colorant, the polymerizable compounds includes a monofunctional polymerizable compound in an amount of 78 percent by mass or more with respect to a total mass of the polymerizable compounds, and the colorant includes at least one selected from the group consisting of C.I. Pigment Orange 36, C.I. Pigment Orange 38, C.I. Pigment Orange 43, C.I. Pigment Orange 64, C.I. Pigment Orange 71, C.I. Pigment Red 177, C.I. Pigment Red 179, C.I. Pigment Red 224, C.I. Pigment Red 254, C.I. Pigment Red 255, C.I. Pigment Violet 23, C.I. Pigment Violet 32, C.I. Pigment Violet 37, C.I. Pigment Violet 39, C.I. Pigment Green 7, C.I. Pigment Green 36, C.I. Pigment Blue 15:6, C.I. Pigment Blue 25, and C.I. Pigment Blue 60.

Abstract: An ink jet method includes a step of adhering ink jet compositions containing colorants and polymerizable compounds to be cured with radioactive rays to a recording medium by one printing operation, and the ink jet compositions includes an orange ink composition and a red ink composition.

Abstract: A radiation-curable ink jet composition includes titanium oxide, a polymerizable compound, and a photopolymerization initiator, in which the titanium oxide has an average particle diameter of equal to or more than 250 nm and equal to or less than 400 nm, and the polymerizable compound contains a vinyl group-containing (meth)acrylate represented by the following formula (I). H2C?CR1—CO—OR2—O—CH?CH—R3??(I) (wherein R1 represents a hydrogen atom or a methyl group, R2 represents a divalent organic residue having 2 to 20 carbon atoms, and R3 represents a hydrogen atom or a monovalent organic residue having 1 to 11 carbon atoms.

Abstract: An ink jet method includes an ejecting step of ejecting a radiation-curable ink jet composition from an ink jet head and an irradiating step of irradiating the ejected radiation-curable ink jet composition with an ultraviolet ray at an irradiation intensity of 3 to 10 W/cm2 by using a light emitting diode. The radiation-curable ink jet composition contains monofunctional monomers including a nitrogen-containing monofunctional monomer. The amount of the nitrogen-containing monofunctional monomer relative to the total amount of the radiation-curable ink jet composition is 5 to 40 mass %.

Abstract: An ink jet process includes an ejection step, in which a radiation-curable ink jet composition is ejected from an ink jet head to a recording medium, and a curing step, in which the ejected ink jet composition is irradiated with radiation to give a cured coating of the ink jet composition. The ink jet composition contains at least one polymerizable compound, at least one photopolymerization initiator, and C.I. Pigment Red 57:1. The C.I. Pigment Red 57:1 constitutes 4.0% by mass or more of the total amount of the ink jet composition, and the cured coating has a maximum thickness of 5 ?m or less.

Abstract: An ink jet method includes: a discharging step of discharging a radiation-curable ink jet composition onto a recording medium at an ink weight per dot of 22 ng/dot or less by using an ink jet head having a nozzle density of 600 npi or more and configured to discharge the radiation-curable ink jet composition; and an irradiating step of irradiating, with radiation, the radiation-curable ink jet composition attached to the recording medium. The radiation-curable ink jet composition contains polymerizable compounds containing a monofunctional monomer and a multifunctional monomer. The monofunctional monomer includes a nitrogen-containing monofunctional monomer. The amount of the monofunctional monomer is 90 mass % or more relative to the total amount of the polymerizable compound. The amount of the nitrogen-containing monofunctional monomer is from 1 to 15 mass % relative to the total amount of the polymerizable compounds.

Abstract: An ink jet method includes: a discharging step of discharging a radiation-curable ink jet composition onto a recording medium at an ink weight per dot of 22 ng/dot or less by using an ink jet head configured to discharge the radiation-curable ink jet composition and having a nozzle density of 600 npi or more; and an irradiating step of irradiating, with radiation, the radiation-curable ink jet composition attached to the recording medium. The radiation-curable ink jet composition contains polymerizable compounds including a monofunctional monomer and a multifunctional monomer. The monofunctional monomer includes a nitrogen-containing monofunctional monomer. The amount of the monofunctional monomer is 90 mass % or more relative to the total amount of the polymerizable compounds. The amount of the nitrogen-containing monofunctional monomer is from 1 to 15 mass % relative to the total amount of the polymerizable compounds.

Abstract: There is provided a maintenance liquid, which is used in maintenance of a device equipped with a discharge head for discharging an ultraviolet ray curable-type composition containing the acyl phosphine oxide-based photopolymerization initiator toward an attachment object, including a polymerizable compound in which a saturation solubility of an acyl phosphine oxide-based photopolymerization initiator at 20° C. is equal to or greater than 5.0% by mass.

Abstract: A radiation curing ink jet printing method for forming a cured coating having a thickness of 0.5 ?m to 5 ?m includes an ejection step of ejecting a radiation-curable ink composition onto a printing medium, and an irradiation step of irradiating the radiation-curable ink composition on the printing medium with an active radiation having an emission peak wavelength in the range of 350 nm to 420 nm from an active radiation source. The radiation-curable ink composition contains one or more monofunctional monomers and one or more multifunctional monomers in such a proportion that the ratio of the total mass of the monofunctional monomers to the total mass of the multifunctional monomers is 0.45 or more. In the irradiation step, the radiation-curable ink composition is irradiated with the active radiation in an atmosphere having an oxygen concentration lower than the atmospheric oxygen concentration.

Abstract: There is provided a maintenance liquid, which is used in maintenance of a device equipped with a discharge head for discharging an ultraviolet ray curable-type composition containing the acyl phosphine oxide-based photopolymerization initiator toward an attachment object, including a polymerizable compound in which a saturation solubility of an acyl phosphine oxide-based photopolymerization initiator at 20° C. is equal to or greater than 5.0% by mass.

Abstract: Provided is a three-dimensional shaped article with relatively high strength and relatively high accuracy. A sintering and shaping method includes: a shaping layer forming process of forming a shaping layer by using a sintering and shaping material in which inorganic particles are included; a process of applying a liquid binding agent, in which a thermoplastic resin and inorganic particles are included, to a desired region of the shaping layer; a process of curing the liquid binding agent, which is applied, to form a shaping cross-sectional layer (shaping portion); a process of removing a region (non-shaping portion) of the shaping layer to which the liquid binding agent is not applied; and a process of heating the shaping cross-sectional layer that is laminated for a sintering treatment.