Abstract: Provided are an ink set and an image recording method which enable an image recorded material with excellent adhesiveness and excellent bend resistance to be obtained in a case where an image is recorded using a colored ink and a white ink. The ink set is an ink set including a colored ink which contains at least one colored pigment selected from the group consisting of a chromatic pigment and a black pigment, a first pigment dispersant, and water, and a white ink which contains a white pigment, a second pigment dispersant, and water, in which the first pigment dispersant is a random polymer, and the second pigment dispersant is a block polymer.

Abstract: Provided are an ink set including a colored ink containing a colored pigment which is at least one of a chromatic pigment or a black pigment, a pigment dispersant, and water, and a white ink containing a white pigment, a pigment dispersant, and water, in which the pigment dispersants respectively contained in the colored ink and the white ink contain a polymer having a crosslinked structure or a block polymer, and an image recording method.

Abstract: Provided is an image recording method including a step of preparing an ink containing water and a white pigment, and a step of jetting the ink from an ink jet head in a liquid droplet amount of 1.0 pL or greater to apply the ink onto a base material, in which in a case where an ink jetting surface of the ink jet head is immersed in the ink in a vertically standing state for 2 seconds, the jetting surface is pulled up from the ink in the state, and the jetting surface is allowed to stand in the state for 1 minute, a ratio of an area of a region to which the ink is adhered to an area of the jetting surface is 40% by area or less.

Abstract: Provided is an image recording method including an applying step of applying a pretreatment liquid containing water and an aggregating agent onto an impermeable base material and applying an ink containing water and a colorant onto a region of the impermeable base material where the pretreatment liquid has been applied, and a drying step of drying the ink applied onto the region to obtain an image, in which the drying step includes blowing of hot air at a wind speed of greater than 15 m/s to the ink applied onto the region, and in a case where the number of grams of the ink applied per 1 m2 in an image area with a density of 100% is defined as X, and the number of grams of the pretreatment liquid applied per 1 m2 in the image area with a density of 100% is defined as Y, a viscosity of a kneaded material obtained by adding (6.5Y/X) mg of the pretreatment liquid to 10 g of the ink and defoaming and kneading the mixture at 200 rpm for 5 minutes is in a range of 30 mPa·s to 500 mPa·s.

Abstract: An ink set is an ink set including a treatment liquid having a pH of 4.5 or less or 9.5 or greater, and an ink containing a compound A which generates gas in an environment of a pH of 4.5 or less or 9.5 or greater, a resin, water, and a white pigment and having a pH of greater than 4.5 and less than 9.5, in which a ratio of a content mass of the white pigment to a content mass of the compound A in the ink is 1 or greater and 160 or less.

Abstract: An image forming method includes a step of applying a pretreatment liquid containing an aggregating agent (D) and water (E) onto a base material and a step of forming an image by applying an ink containing water (A), a resin (B), and an organic solvent (C) satisfying Expression (1) onto the pretreatment liquid applied onto the base material, in which in a region to which the ink has been applied, CC which is the number of grams of the organic solvent (C) to be applied per area of 1 m2 and CD which is the number of grams of the aggregating agent (D) to be applied per area of 1 m2 satisfy Expression (2). SPB represents an SP value (MPa1/2) of a main resin in the resin (B), SPC represents an SP value (MPa1/2) of the organic solvent (C), and |SPC?SPB| represents an absolute value of a difference between SPC and SPB. |SPC?SPB|?10.0??Expression (1) 0.10?CC/CD?2.

Abstract: An inkjet ink composition includes water (A), a resin (B), and an organic solvent (C) which has a boiling point of 250° C. or lower, satisfies Expression (C1), and has a nitrogen atom, in which a content mass ratio of the organic solvent (C) to a main resin in the resin (B) is 0.01 or greater and less than 2.0. In Expression (C1), SPB represents an SP value of the main resin in the resin (B) in a unit of MPa1/2, SPC represents an SP value of the organic solvent (C) in the unit of MPa1/2, and |SPC?SPB| represents an absolute value of a difference between SPC and SPB. |SPC?SPB|?10.

Abstract: An ink composition for performing printing on an impermeable base material, including water (A), a resin (B) which is at least one selected from the group consisting of an acrylic resin, a polyester resin, and a urethane resin, and an organic solvent (C) which has a boiling point of 250° C. or lower, has no nitrogen atom, and satisfies Expression (C1), in which a total content of the organic solvent (C) is in a range of 0.01% by mass to 5.0% by mass with respect to a total amount of the ink composition for performing printing on an impermeable base material. In Expression (C1), SPB represents an SP value of a main resin in the resin (B) in an MPa1/2 unit, SPC represents an SP value of the organic solvent (C) in the MPa1/2 unit, and |SPC?SPB| represents an absolute value of a difference between SPC and SPB. |SPC?SPB|?10.

Abstract: An embodiment of the present invention provides an inkjet ink composition including water, a dispersant, inorganic pigment particles having an average primary particle diameter of 100 nm or greater, and resin particles A having a glass transition temperature of 40° C. or higher, in which X nm of an average primary particle diameter of the inorganic pigment particles and Y nm of a volume average particle diameter of the resin particles A satisfy Y?1.1×X; a maintenance method in a case of using the inkjet ink composition; an image recording method carried out using the inkjet ink composition; and an image recorded material containing a solidified material of the inkjet ink composition.

Abstract: An embodiment of the present invention provides an inkjet ink composition including water, a dispersant, white inorganic pigment particles having an average primary particle diameter of 150 nm to 400 nm, and resin particles A having a glass transition temperature of higher than 120° C.; an image recording method carried out using the inkjet ink composition; and an image recorded material including a solidified material of the inkjet ink composition.

Abstract: The image recording paper medium contains at least one kind of organic phosphorus compound selected from an organic phosphonic acid represented by the following Formula (1), a salt thereof, an organic phosphoric acid represented by the following Formula (2), and a salt thereof. In the formulae, each of R1 and R2 independently represents an unsubstituted alkyl group, an unsubstituted cycloalkyl group, an unsubstituted alkenyl group, or an aryl group.

Abstract: The image recording method includes the following steps (a) to (c): (a) forming a barrier layer on a recording medium by using a solution which contains an acidic group-containing polymer in a nonaqueous medium; (b) forming an organic acid-containing layer on the barrier layer; and (c) forming an image by jetting an aqueous ink onto the organic acid-containing layer by an ink jet method.

Abstract: The present invention provides an ink jet recording ink including a dye which has a weight average molecular weight of 850 or less and is represented by Formula (1) below, a water-soluble organic solvent which has an SP value of 9.4 or more and less than 9.75 and is represented by Formula (2) or (3) below, and water, in which the content of a surfactant is less than 0.1% by mass. R1, R2: H, a halogen atom, OH, COOH, C1-C6 alkyl group, C1-C6 alkoxy group, NO2, an azophenyl group, -L1-Ra and the like, L1: O, CH2, C6H4, N?N, SO2 or a combination thereof, Ra: a phenyl group, a naphthyl group, or the like, R3: H, an azophenyl group, an azonaphthalene group, -L2-Rb or the like, L2: C(?O), C6H4, N?N, NH, SO2 or a combination thereof, Rb: a phenyl group, a naphthyl group, a pyrimidyl group, or the like; M+: H+, Na+, NH4+, an alkylammonium ion or the like, R: C2-C6 unsubstituted alkyl group, and n is 1 to 3.

Abstract: The image recording method includes the following steps (a) to (c): (a) forming a barrier layer on a recording medium by using a solution which contains an acidic group-containing polymer in a nonaqueous medium; (b) forming an organic acid-containing layer on the barrier layer; and (c) forming an image by jetting an aqueous ink onto the organic acid-containing layer by an ink jet method.

Abstract: An image forming method comprises: applying a treatment liquid, which contains an organic acidic compound represented by the following general formula (I), a water-soluble polymer compound, and water, on a recording medium; and applying an ink composition, which contains a pigment, a pyrrolidone derivative, a compound represented by the following general formula (II), and water, on a treatment liquid-applied surface of the recording medium. In the general formula (I), n represents an integer of 2 or greater and m represents an integer of 3 or greater. In the general formula (II), l, m, and n represent an integer of 1 or greater, the relation l+m+n=3 to 15 is satisfied, and AO represents ethyleneoxy or propyleneoxy.

Abstract: The present invention provides an ink jet recording ink including a dye which has a weight average molecular weight of 850 or less and is represented by Formula (1) below, a water-soluble organic solvent which has an SP value of 9.4 or more and less than 9.75 and is represented by Formula (2) or (3) below, and water, in which the content of a surfactant is less than 0.1% by mass. R1, R2: H, a halogen atom, OH, COOH, C1-C6 alkyl group, C1-C6 alkoxy group, NO2, an azophenyl group, -L1-Ra and the like, L1: O, CH2, C6H4, N=N, SO2 or a combination thereof, Ra: a phenyl group, a naphthyl group, or the like, R3: H, an azophenyl group, an azonaphthalene group, -L2-Rb or the like, L2: C(?O), C6H4, N?N, NH, SO2 or a combination thereof, Rb: a phenyl group, a naphthyl group, a pyrimidyl group, or the like; M+: H+, Na+, NH4+, an alkylammonium ion or the like, R: C2-C6 unsubstituted alkyl group, and n is 1 to 3.

Abstract: The image recording paper medium contains at least one kind of organic phosphorus compound selected from an organic phosphonic acid represented by the following Formula (1), a salt thereof, an organic phosphoric acid represented by the following Formula (2), and a salt thereof. In the formulae, each of R1 and R2 independently represents an unsubstituted alkyl group, an unsubstituted cycloalkyl group, an unsubstituted alkenyl group, or an aryl group.

Abstract: An image forming method includes an ink applying step of applying an ink composition containing a pigment, a compound represented by the following structural formula (1), a compound represented by the following structural formula (2) and water, onto a recording medium being conveyed at a conveyance speed of 80 m/min or higher: wherein l, m and n each represent an integer of 1 or more (l+m+n=3 to 15); AO represents ethyleneoxy or propyleneoxy; R represents a hydrocarbon group having 6 to 30 carbon atoms; PO represents propyleneoxy; EO represents ethyleneoxy; and p and q represent integers that satisfy the relations: 0?p?10 and 1?q?50.

Abstract: An image forming method comprises: applying a treatment liquid, which contains an organic acidic compound represented by the following general formula (I), a water-soluble polymer compound, and water, on a recording medium; and applying an ink composition, which contains a pigment, a pyrrolidone derivative, a compound represented by the following general formula (II), and water, on a treatment liquid-applied surface of the recording medium. In the general formula (I), n represents an integer of 2 or greater and m represents an integer of 3 or greater. In the general formula (II), l, m, and n represent an integer of 1 or greater, the relation l+m+n=3 to 15 is satisfied, and AO represents ethyleneoxy or propyleneoxy.

Abstract: The invention provides an image forming method including at least applying an ink composition to a recording medium to form an image, the recording medium having an absorption amount of the ink composition, within 20 msec1/2 from a start of contact of the ink composition with the recording medium, of 20 ml/m2 or larger according to the Bristow method and being conveyed in a feed direction at a conveying speed of 80 m/min or higher, and the ink composition containing at least a pigment, a compound represented by the following Formula (1), wax and water. In Formula (1), each of l, m, and n independently represents an integer of 1 or more; the sum of l, m, and n is from 3 to 15; and each AO of (AO)l, (AO)m, and (AO)n independently represents an ethyleneoxy group or a propyleneoxy group.