Abstract: An image forming method is provided. The method includes the steps of (a) applying an ink to a recording medium to form an image and (b) applying a pressure to the recording medium to which the ink has been applied. The ink comprises water, an organic solvent, and a colorant. When the ink is formed into an ink film, a maximum value of logarithmic damping ratio of the ink film is 1.50 or less and a time elapsed until the logarithmic damping ratio reaches the maximum value is 3,800 seconds or less, when measured by a rigid-body pendulum test at 60° C.

Abstract: Provided is an ink including: a pigment-containing matter containing a pigment; an organic solvent; water; and a compound represented by General Formula (1) below. A difference (Ra?R0) is 2.0 or less, where Ra is a distance between a Hansen solubility parameter of the organic solvent and a Hansen solubility parameter of the pigment-containing matter determined by a Hansen solubility sphere method, and R0 is an interaction radius of the pigment-containing matter determined by the Hansen solubility sphere method. In the General Formula (1), R1, R2, R3, and R4 each independently represent a hydrogen atom or an alkyl group having 1 or more but 5 or less carbon atoms, and n represents an integer of 3 or more but 11 or less.

Abstract: An ink contains water, an organic solvent, a resin, and a pigment, wherein the organic solvent has a Hansen solubility parameter (HSP) value in a Hansen sphere in a ?D axis, ?P axis, and ?H axis coordinate space of a solid content of the ink.

Abstract: An image forming method includes applying a processing fluid to a recording medium, applying an ink to the recording medium onto which the processing fluid has been applied, and heating the recording medium onto which the ink has been applied, wherein the ink comprises a black ink and at least one color ink other than the black ink, wherein the following relationship is satisfied: |?(k)-?(c)|?5 mN/m, where ?(k) represents a dynamic surface tension of the black ink at a surface lifetime of 15 ms and ?(c) represents a dynamic surface tension of the at least one color ink at a surface lifetime of 15 ms, wherein the ink discharged from an extreme downstream nozzle in a direction of recording medium conveyance is heated at 1.5 seconds or less after the ink is attached to the recording medium.

Abstract: A liquid discharge system includes a pretreatment execution device to perform pretreatment on a medium and a liquid discharge head to discharge liquid onto the medium based on image information on an image to be output. The liquid discharge system further includes circuitry configured to control a manner of the pretreatment based on the image information.

Abstract: An image forming method is provided. The method includes the steps of (a) applying an ink to a recording medium to form an image and (b) applying a pressure to the recording medium to which the ink has been applied. The ink comprises water, an organic solvent, and a colorant. When the ink is formed into an ink film, a maximum value of logarithmic damping ratio of the ink film is 1.50 or less and a time elapsed until the logarithmic damping ratio reaches the maximum value is 3,800 seconds or less, when measured by a rigid-body pendulum test at 60° C.

Abstract: An image forming method is provided. The method includes the steps of (a) applying an ink to a recording medium to form an image and (b) applying a pressure to the recording medium to which the ink has been applied. The ink comprises water, an organic solvent, and a colorant. When the ink is formed into an ink film, a maximum value of logarithmic damping ratio of the ink film is 1.50 or less and a time elapsed until the logarithmic damping ratio reaches the maximum value is 3,800 seconds or less, when measured by a rigid-body pendulum test at 60° C.

Abstract: An image forming method includes applying a processing fluid to a recording medium, applying an ink to the recording medium onto which the processing fluid has been applied, and heating the recording medium onto which the ink has been applied, wherein the ink comprises a black ink and at least one color ink other than the black ink, wherein the following relationship is satisfied: |?(k)-?(c)|?5 mN/m, where ?(k) represents a dynamic surface tension of the black ink at a surface lifetime of 15 ms and ?(c) represents a dynamic surface tension of the at least one color ink at a surface lifetime of 15 ms, wherein the ink discharged from an extreme downstream nozzle in a direction of recording medium conveyance is heated at 1.5 seconds or less after the ink is attached to the recording medium.

Abstract: A method of using recorded matter is provided. The method includes conveying a recorded matter at a relative humidity of 40% or less, where the recorded matter includes a recording medium and a recorded layer on the recording medium. The recorded layer includes an organic solvent, a colorant, and a resin. The organic solvent includes a hexanediol and a propylene glycol. The resin includes an acrylic resin and a urethane resin, where a mass ratio of the urethane resin to the acrylic resin ranges from 0.1 to 0.7.

Abstract: A liquid discharge system includes a pretreatment execution device to perform pretreatment on a medium and a liquid discharge head to discharge liquid onto the medium based on image information on an image to be output. The liquid discharge system further includes circuitry configured to control a manner of the pretreatment based on the image information.

Abstract: An ink includes an organic solvent and polyethylene wax, wherein the polyethylene wax has a penetration of 1.2 or less as measured according to JIS K2235 format.

Abstract: An image forming method is provided. The method includes the steps of (a) applying an ink to a recording medium to form an image and (b) applying a pressure to the recording medium to which the ink has been applied. The ink comprises water, an organic solvent, and a colorant. When the ink is formed into an ink film, a maximum value of logarithmic damping ratio of the ink film is 1.50 or less and a time elapsed until the logarithmic damping ratio reaches the maximum value is 3,800 seconds or less, when measured by a rigid-body pendulum test at 60° C.

Abstract: A method of using recorded matter is provided. The method includes conveying a recorded matter at a relative humidity of 40% or less, where the recorded matter includes a recording medium and a recorded layer on the recording medium. The recorded layer includes an organic solvent, a colorant, and a resin. The organic solvent includes a hexanediol and a propylene glycol. The resin includes an acrylic resin and a urethane resin, where a mass ratio of the urethane resin to the acrylic resin ranges from 0.1 to 0.7.

Abstract: A toner, wherein the toner is obtained by washing a toner particle dispersion liquid which is obtained by adding cellulase to a dispersion slurry, and the dispersion slurry is obtained from a dispersion liquid or an emulsion of a toner material-containing oil phase in an aqueous medium, and wherein the dispersion liquid or the emulsion contains a cellulosic dispersion stabilizing agent.

Abstract: A toner, wherein the toner is obtained by washing a toner particle dispersion liquid which is obtained by adding cellulase to a dispersion slurry, and the dispersion slurry is obtained from a dispersion liquid or an emulsion of a toner material-containing oil phase in an aqueous medium, and wherein the dispersion liquid or the emulsion contains a cellulosic dispersion stabilizing agent.