Abstract: An ink composition includes (A) at least one polymerizable compound selected from the group consisting of a monofunctional radically polymerizable monomer having an aliphatic cyclic structure, an N-vinyllactam, and an aromatic monofunctional radically polymerizable monomer, (B) a radical polymerization initiator, (C) a pigment, and (D) a graft copolymer having a repeating unit represented by the formula below in a graft chain: wherein R denotes a hydrogen atom or a methyl group, X denotes a single bond, —O—, —CO—, —COO—, —CONR1—, —OCO—, or a phenylene group, R1 denotes a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group, L denotes a single bond or a divalent linking group, Z denotes —NR2R3, R2 and R3 independently denote a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group, and R2 and R3 may be bonded to each other to form a ring.

Abstract: There is disclosed an inkjet image forming method. The method includes recording an image on a recording medium by an inkjet method; supplying a liquid including powder particles having a volume-average particle diameter of 1 ?m or more to a surface of a heating roller; and applying the powder particles onto the recording medium via the heating roller.

Abstract: An image forming method including applying an ink composition onto a recording medium by an inkjet method, and applying an liquid including particles onto the recording medium is disclosed.

Abstract: The present invention provides an inkjet image forming method including: forming an image by applying an ink composition containing a first color material and water onto a recording medium; and applying a treatment liquid containing a wax and water onto the image, wherein the treatment liquid contains a second color material, and the first color material and the second color material may be the same or different.

Abstract: An object of the present invention is to provide an aqueous ink for inkjet recording, ensuring that even after storage for a long period of time or exposure to a high temperature, the ejection accuracy is excellent and generation of density unevenness and streak unevenness can be suppressed. An aqueous ink for inkjet recording, comprising a vinyl polymer particle containing A and B and a water-soluble solvent: A: an azo pigment having a specific structure, its tautomer, or a salt or hydrate thereof; B: a vinyl polymer containing (a) a hydrophobic structural unit having an aromatic ring bonded to the polymer main chain through a linking group and (b) a hydrophilic structural unit.

Abstract: An image forming method is disclosed, which includes applying a treatment liquid onto a recording medium that has a coated layer and has an area of 1,250 cm2 or more, applying an ink composition including a pigment and resin particles having a glass transition temperature (Tg) of 100° C. or higher onto the recording medium onto which the treatment liquid has been applied and which is conveyed at a conveyance speed of 200 mm/s or higher, heating and drying the applied treatment liquid and ink composition, cooling the recording medium that has been subjected to the heating and drying, to a temperature of 35° C. or lower, and accumulating the recording medium that has been subjected to the cooling, into an accumulation unit.

Abstract: A recording medium containing a substantially colorless compound in which at least 10 atoms having conjugate ? electrons are present on a per-molecule basis, wherein it is especially preferable that the compound has at least two aromatic ring groups and/or shows no fluorescence. An ink composition used for printing in image form on media, with the composition containing a dye and controlling a hue change caused in the printed images over a period of one hour immediately after the printing to 5 or below in color-difference terms. And a method of recording images on media by printing an ink composition in image form, wherein the ink composition contains a dye and a hue change caused in the printed images over a period of one hour immediately after the printing is controlled to 5 or below in color-difference terms.

Abstract: An inkjet recording liquid includes: water; a colorant; a first water-soluble organic solvent having a structure represented by the following Formula (1), an SP value of 27.5 or less, and a molecular weight of 100 to 210; and a second water-soluble organic solvent having a structure represented by the following Formula (2), an SP value of 27.5 or less, and a molecular weight of 240 to 2000, wherein the mass ratio of the content of the first water-soluble organic solvent to the content of the second water-soluble organic solvent is from 1:3 to 3:1: R1-(A1)n-OH??Formula (1) R2-(A2)m-OH??Formula (2) In Formulae (1) and (2), R1 represents a hydrogen atom or an alkyl group, R2 represents a hydrogen atom, an alkyl group, or a group derived from a sugar alcohol, each A1 independently represents an ethyleneoxy group or a propyleneoxy group, each A2 independently represents an ethyleneoxy group or a propyleneoxy group, n represents an integer from 1 to 3 and m represents an integer from 3 to 40.

Abstract: The present invention provides an image forming method at least including: applying, by an inkjet method, an ink composition containing at least one pigment as a coloring material, at least one kind of resin particles, at least one fluorine-based surfactant and water, on a recording medium which has a single pigment layer or multiple pigment layers on or above at least one surface of a support containing a cellulose pulp as a main component, and has an amount of transfer of purified water to a medium, when measured with a dynamic scanning absorptometer, of from 1 ml/m2 to 15 ml/m2 for a contact time of 100 ms, and of from 2 ml/m2 to 20 ml/m2 for a contact time of 400 ms; and applying a treatment liquid containing at least one aggregating agent that aggregates components in the ink composition.

Abstract: An inkjet-recording method of recording an image on an ink-receiving layer, includes the steps of ejecting ink droplets of a water-soluble ink containing a water-soluble phthalocyanine dye on the ink-receiving layer of an inkjet-recording medium having a substrate and an ink-receiving layer which contains a water-soluble bivalent metal salt in an amount of 0.01 to 2 g/m2 formed thereon.

Abstract: The present invention provides an ink set including an ink composition and a maintenance liquid, wherein the ink composition includes a pigment, polymer particles having a glass transition temperature (Tg) of 50° C. or higher, and at least one of urea or a urea derivative.

Abstract: An image forming method including: at least recording an image by ejecting, by an ink jet method, an ink composition containing, at least one pigment as a coloring material, particles of at least one resin, at least one water-soluble organic solvent, and water, the ink composition having a surface tension of from 30 mN/m to 40 mN/m, to a recording medium having a single-layered or multi-layered pigment layer on or above at least one side of a support containing cellulose pulp as a main ingredient and a transferring amount of pure water to the recording medium, when measured by a dynamic scanning liquid absorptometer, of from 1 ml/m2 to 15 ml/m2 at a period of contact time of 100 ms and from 2 ml/m2 to 20 ml/m2 at a period of contact time of 400 ms, and heating the recorded image, is provided.

Abstract: An ink composition for ink-jet recording includes a pigment; resin particles having a glass transition temperature of 80° C. or higher; at least one water-soluble organic solvent; and water, and a total mass of solid content in the ink composition for ink-jet recording is 10% by mass or more relative to the ink composition for ink-jet recording, and the at least one water-soluble organic solvent includes at least one organic solvent having an SP value of 27.5 or lower, the amount of the at least one organic solvent having an SP value of 27.5 or lower being 70% by mass or more relative to a total amount of the at least one water-soluble organic solvent. An ink-jet recording method is also provided.

Abstract: An ink composition, which comprises: at least two kinds of water-soluble dyes each having the maximum wavelength of an absorption spectrum in an aqueous solvent of from 550 to 700 nm, wherein at least one of the at least two kinds of water-soluble dyes is selected from the group consisting of a compound represented by formula (L-1) as defined in the specification, a salt of the compound represented by formula (L-1) and a compound having a naphthalene ring substituted with at least one hydroxyl group and three or more azo groups; an ink set containing at least one kind of the ink composition; a recording method comprising applying the ink composition to a recording medium; and a recording method comprising loading the ink set on a recording apparatus, and applying the ink from the recording apparatus to a recording medium.

Abstract: The invention provides an ink composition containing at least: a water-soluble organic solvent; a pigment; water; and a nonionic polymer thickener. The content of the water-soluble organic solvent is from 5 weight % to 30 weight % relative to the total amount of the ink composition. The ratio of Vhigh/Vlow, in which Vhigh represents 25° C. viscosity (mPa·s) measured at a shear rate of 1.5×105 (s?1) and Vlow represents 25° C. viscosity (mPa·s) measured at a shear rate of 3.0×103 (s?1), is from 0.70 to 0.95. The invention further provides an image formation method including at least ejecting the ink composition onto an image recording medium using an image formation apparatus to form an image on the image recording medium.

Abstract: The invention provides an inkjet recording liquid containing at least: water; a colorant; a water-soluble solid compound having the molecular weight of 80 or more but less than 1,600 and having a solubility parameter value of 20 or more; and a water-soluble solvent having a solubility parameter value of less than 27.5, the ratio of the content of the water-soluble solvent to the content of the water-soluble solid compound being in the range of from 1.0 to 10.0.

Abstract: The invention discloses a recording medium containing a compound shown by the following Formula (1) (Y1)n—Z1—(X)l—Z2—(Y2)m??Formula (1) wherein, in Formula (1): each of Z1 and Z2 indicates a substituted or unsubstituted aromatic ring which may have a hetero atom; X indicates —O—, —S—, —S—S—, or —C(R)2—; R indicates an alkyl group or a hydrogen atom; each of Y1 and Y2 indicates a sulfo group, a carboxyl group, a phosphono group, a carbonamide group, a sulfonamide group, or a quaternary ammonium salt; l indicates 0 or 1; and each of m and n indicates 0 or an integer of 1 or more, and at least one of m and n is an integer of 1 or more.

Abstract: An ink composition, which comprises at least two kinds of water-soluble dyes, wherein at least one of the at least two kinds of water-soluble dyes is a compound selected from the group consisting of a compound represented by formula (S-1), which is described in the specification, and a salt of the compound represented by formula (S-1) and at least one of the at least two kinds of water-soluble dyes is a compound represented by formula (L-1), which is described in the specification, or a compound having a naphthalene ring substituted with at least one hydroxyl group and three or more azo groups.

Abstract: The invention provides an image formation method including at least ejecting an ink composition onto an image recording medium using an image formation apparatus to form an image on the image recording medium. The ink composition contains at least water, a colorant, and one or more water-soluble organic solvents. The one or more water-soluble organic solvents contains at least a water-soluble organic solvent having a solubility parameter value of 27.5 or less at a content of 70% by mass or more with respect to the total content of the one or more water-soluble organic solvent. The image formation apparatus contains at least an ink circulation unit. The ink circulation unit supplies the ink composition to a plurality of droplet ejecting devices from a common flow path and circulating the ink composition through a common circulation path.

Abstract: The invention provides an image forming method having at least: applying, onto a recording medium, an ink composition containing at least a water-soluble organic solvent, a pigment, a polymer particle and water; and removing at least a part of the water-soluble organic solvent from the ink composition on the recording medium. The water-soluble organic solvent contains at least a water-soluble organic solvent having a vapor pressure of less than 10 Pa at 20° C., a boiling temperature of less than 260° C., and an SP value of less than 25, at a content of 30 mass % or more with respect to the total water-soluble organic solvent content of the ink composition.