Abstract: Ink containing a pigment, an alcohol alkoxylate-based surfactant, a water-soluble organic solvent, water, and a dispersion agent represented by the following chemical structure 1, wherein the ink has a dynamic surface tension of 36 mN/m or less when the life of foam at 25° C. as measured by the maximum bubble pressure technique is 15 msec: where R1 represents an alkyl group having one to four carbon atoms, an aryl group, and an aralkyl group having one to eight carbon atoms, L represents zero or an integer of from 1 to 7, and n represents an integer of from 20 to 80.

Abstract: The inkjet recording method includes ejecting an inkjet ink toward a recording medium to form an ink image on the recording medium. The inkjet ink includes a pigment, water, a surfactant, and a compound having a formula (1) CH3OCH2CH2CON(CH3)2, and optionally includes a compound having a formula (2) CH3CH2CH2CH2OCH2CH2CON(CH3)2. The inkjet recording method satisfies a relation, 16?? cos ??26, wherein ? represents the surface tension of the inkjet ink in units of mN/m, and ? represents the angle of contact of the inkjet ink with the recording medium in units of degree measured 0.1 seconds after dropping an droplet of the inkjet ink with a volume of 2.5 ?l on the recording medium.

Abstract: An image forming method applying a pretreatment liquid on the surface of a recording medium; and applying an inkjet ink including a colorant, a hydrosoluble organic solvent, a surfactant and water on the surface applied with the pretreatment liquid, wherein the hydrosoluble organic solvent includes at least one polyol including an equilibrium water content in an amount not less than 30% by weight at 23° C. and 80% RH; an amide compound having the following formula (I); and at least one of compounds having the following formulae (II) to (IV), and wherein a pure water transfers to the recording medium in an amount of from 1 to 15 mL/m2 when measured by a dynamic scanning liquid absorptometer at a contact time of 100 ms.

Abstract: An inkjet ink of the present invention including: water; an organic solvent; a surfactant; and a colorant, wherein the organic solvent comprises the following (1), (2) and (3): (1) at least one polyhydric alcohol having an equilibrium moisture content of 30% by mass or higher at a temperature of 23° C. and humidity of 80% RH; (2) an amide compound expressed by the Structural Formula (I); (3) a compound expressed by the Structural Formula (II); a compound expressed by the Structural Formula (III), or a compound represented by the General Formula (I), or any combination thereof.

Abstract: An ink for inkjet recording, containing: dispersed particles A; dispersed particles B; a water-soluble solvent; a surfactant; and water, wherein the dispersed particles A are coloring particles obtained by dispersing an organic pigment in water with assistance of a surfactant, and the dispersed particles B are coloring particles obtained by dispersing a polymer-coated organic pigment in water.

Abstract: The inkjet recording method includes ejecting an inkjet ink toward a recording medium to form an ink image on the recording medium. The inkjet ink includes a pigment, water, a surfactant, and at least one of 3-methoxy-N,N-dimethylpropionamide and 3-n-butoxy-N,N-dimethylpropionamide. When Dp represents the diameter of a pigment portion in a dot image formed by dropping a droplet of the inkjet ink with a volume of 0.5 ?l on the recording medium, and Dv represent the diameter of a vehicle portion in the dot image, the ratio Dv/Dp is from 1.4 to 1.7.

Abstract: The present invention provides an inkjet ink containing at least a colorant, water, a water insoluble resin, a fluorine surfactant, and a polyether-modified silicone oil, wherein the polyether-modified silicone oil has a hydrophobic value of 0.40 to 1.5, and the hydrophobic value is expressed by Equation 1; Hydrophobic value=A/B??Equation 1 where “A” represents an integration value of a peak area from 0 ppm to 0.3 ppm in a 1H-NMR spectrum of the polyether-modified silicone oil using tetramethylsilane as a reference substance; and “B” represents an integration value of a peak area from 3.5 ppm to 4.0 ppm in the 1H-NMR spectrum.

Abstract: An inkjet recording ink containing a colorant, a surfactant A, a surfactant B, a water soluble organic solvent, and water, wherein the surfactant A is expressed by any one of Structural Formula (1) and Structural Formula (2), and the surfactant B is expressed by Structural Formula (3): in Structural Formula (1), R1 represents hydrogen, an alkyl group, or an acyl group; Rf represents —CF3 or —CF2CF3; and m, n and p are natural numbers; in Structural Formula (2), M represents alkali metal, ammonium, phosphonium, or alkanolamine; Rf represents —CF3 or —CF2CF3; and q is a natural number; in Structural Formula (3), R3 and R4 each represent hydrogen or an alkyl group; and r, s, t and u are natural numbers.

Abstract: An inkjet ink, which contains water, an organic solvent, a surfactant, and a colorant, wherein the organic solvent contains at least one polyhydric alcohol having an equilibrium moisture content of 30% by mass or higher at a temperature of 23° C.

Abstract: The inkjet recording method includes ejecting an inkjet ink toward a recording medium to form an ink image on the recording medium. The inkjet ink includes a pigment, water, a surfactant, and a compound having a formula (1) CH3OCH2CH2CON(CH3)2, and optionally includes a compound having a formula (2) CH3CH2CH2CH2OCH2CH2CON(CH3)2. The inkjet recording method satisfies a relation, 16?? cos ??26, wherein ? represents the surface tension of the inkjet ink in units of mN/m, and ? represents the angle of contact of the inkjet ink with the recording medium in units of degree measured 0.1 seconds after dropping an droplet of the inkjet ink with a volume of 2.5 ?l on the recording medium.

Abstract: The inkjet recording method includes ejecting an inkjet ink toward a recording medium to form an ink image on the recording medium. The inkjet ink includes a pigment, water, a surfactant, and at least one of 3-methoxy-N,N-dimethylpropionamide and 3-n-butoxy-N,N-dimethylpropionamide. When Dp represents the diameter of a pigment portion in a dot image formed by dropping a droplet of the inkjet ink with a volume of 0.5 ?l on the recording medium, and Dv represent the diameter of a vehicle portion in the dot image, the ratio Dv/Dp is from 1.4 to 1.7.

Abstract: An image forming method applying a pretreatment liquid on the surface of a recording medium; and applying an inkjet ink including a colorant, a hydrosoluble organic solvent, a surfactant and water on the surface applied with the pretreatment liquid, wherein the hydrosoluble organic solvent includes at least one polyol including an equilibrium water content in an amount not less than 30% by weight at 23° C. and 80% RH; an amide compound having the following formula (I); and at least one of compounds having the following formulae (II) to (IV), and wherein a pure water transfers to the recording medium in an amount of from 1 to 15 mL/m2 when measured by a dynamic scanning liquid absorptometer at a contact time of 100 ms.

Abstract: To provide an inkjet ink, which contains: water; a wetting agent; a surfactant; and a colorant, wherein the wetting agent contains at least an amide compound represented by the following structural formula (I):

Abstract: The present invention provides an inkjet ink containing at least a colorant, water, a water insoluble resin, a fluorine surfactant, and a polyether-modified silicone oil, wherein the polyether-modified silicone oil has a hydrophobic value of 0.40 to 1.5, and the hydrophobic value is expressed by Equation 1; Hydrophobic value=A/B??Equation 1 where “A” represents an integration value of a peak area from 0 ppm to 0.3 ppm in a 1H-NMR spectrum of the polyether-modified silicone oil using tetramethylsilane as a reference substance; and “B” represents an integration value of a peak area from 3.5 ppm to 4.0 ppm in the 1H-NMR spectrum.

Abstract: The present invention provides an inkjet ink containing at least a colorant, water, a water insoluble resin, a fluorine surfactant, and a polyether-modified silicone oil, wherein the polyether-modified silicone oil has a hydrophobic value of 0.40 to 1.5, and the hydrophobic value is expressed by Equation 1: Hydrophobic value=A/B??Equation 1 where “A” represents an integration value of a peak area from 0 ppm to 0.3 ppm in a 1H-NMR spectrum of the polyether-modified silicone oil using tetramethylsilane as a reference substance; and “B” represents an integration value of a peak area from 3.5 ppm to 4.0 ppm in the 1H-NMR spectrum.

Abstract: An ink set for ink-jet recording which includes multiple inks having different colors. Each of the multiple inks includes a colorant, a water-soluble organic solvent, a fluorine-based surfactant, and water. The viscosity difference among the multiple inks is 2.0 mPa·s or less at a temperature of 25° C. and a shearing speed of 230 1/s, and the viscosity difference among the multiple inks is 0.5 mPa·s or less at a temperature of 25° C. and a shearing speed of 100,000 1/s.

Abstract: An ink for inkjet recording, containing: dispersed particles A; dispersed particles B; a water-soluble solvent; a surfactant; and water, wherein the dispersed particles A are coloring particles obtained by dispersing an organic pigment in water with assistance of a surfactant, and the dispersed particles B are coloring particles obtained by dispersing a polymer-coated organic pigment in water.

Abstract: The present invention aims to obtain a highly reliable inkjet recording apparatus using a nozzle plate which is excellent not only in ink repellency at the initial stage of the lifetime thereof but also excellent in mechanical durability against wiping, and the like. For this end, the present invention provides an inkjet recording apparatus which is equipped with at least an ink flying unit configured to fly an inkjet recording ink by applying an impulse to the inkjet recording ink to form an image, wherein the nozzle plate surface of an inkjet head in the ink flying unit has an ink repellent layer containing a silicone resin; and the inkjet recording ink contains at least a pigment, water, a fluorochemical surfactant, and a nonionic surfactant.

Abstract: An inkjet recording ink containing a colorant, a surfactant A, a surfactant B, a water soluble organic solvent, and water, wherein the surfactant A is expressed by any one of Structural Formula (1) and Structural Formula (2), and the surfactant B is expressed by Structural Formula (3): in Structural Formula (1), R1 represents hydrogen, an alkyl group, or an acyl group; Rf represents —CF3 or —CF2CF3; and m, n and p are natural numbers; in Structural Formula (2), M represents alkali metal, ammonium, phosphonium, or alkanolamine; Rf represents —CF3 or —CF2CF3; and q is a natural number; in Structural Formula (3), R3 and R4 each represent hydrogen or an alkyl group; and r, s, t and u are natural numbers.

Abstract: An ink set for ink-jet recording which includes multiple inks having different colors. Each of the multiple inks includes a colorant, a water-soluble organic solvent, a fluorine-based surfactant, and water. The viscosity difference among the multiple inks is 2.0 mPa·s or less at a temperature of 25° C. and a shearing speed of 230 1/s, and the viscosity difference among the multiple inks is 0.5 mPa·s or less at a temperature of 25° C. and a shearing speed of 100,000 1/s.