Abstract: A maintenance method according to an embodiment of the present disclosure is a maintenance method for a recording apparatus including an ink jet head having a nozzle that ejects a water-based ink composition, the maintenance method including a leaving-to-stand step of performing leaving-to-stand with a nozzle surface in which the nozzle of the ink jet head is formed being in contact with an absorbing member containing a maintenance liquid.

Abstract: A recording method according to an embodiment of the present disclosure is a recording method to perform recording on a recording medium in a manner such that while a relative position between an ink jet head and the recording medium is transferred, a scan to eject an ink from the ink jet head so as to be adhered to the recording medium is performed a plurality of times for the recording. The method described above includes a step of adhering a treatment liquid containing an aggregating agent to the recording medium; a step of ejecting a color ink composition containing a colorant from the ink jet head so as to be adhered to the recording medium; and a step of ejecting a clear ink composition containing a resin from the ink jet head so as to be adhered to the recording medium.

Abstract: A recording method includes a treatment solution attachment step, in which a treatment solution is attached to a recording medium, a first ink attachment step, in which a first ink composition is ejected and attached to the recording medium, and a second ink attachment step, in which a second ink composition is ejected and attached to the recording medium. The treatment solution is a water-based treatment solution containing at least one coagulant, and the first ink composition and the second ink composition are water-based ink compositions each containing at least one colorant. The treatment solution, the first ink composition, and the second ink composition are attached to the recording medium through a scan in which the relative positions of the ink jet head and the recording medium are moved, the solution and compositions being attached to the same scan area during the same scan.

Abstract: An ink set according to one embodiment of the present disclosure includes: a water-based ink composition containing a colorant; a first treatment liquid containing an aggregating agent; and a second treatment liquid containing an aggregating agent. In the ink set described above, a content of the aggregating agent in the first treatment liquid is 0.60 mol/kg or more, a content of the aggregating agent in the second treatment liquid is less than 0.60 mol/kg, the first treatment liquid is used together with the ink composition for recording on a recording medium which is a low-permeable substrate, and the second treatment liquid is used together with the ink composition for recording on a recording medium which is an impermeable substrate.

Abstract: An ink set according to one embodiment of the present disclosure is an ink set including a color ink composition and a clear ink composition, and the ink set is used for a recording method in which the color ink composition and the clear ink composition are laminated and adhered to a recording medium by an ink jet method. The color ink composition is an aqueous composition containing a colorant, and the clear ink composition is an aqueous composition containing a resin and a silicone-based surfactant which has a dissolution amount of 1.0 to 3.0 parts by mass with respect to 100 parts by mass of a 1,2-hexanediol aqueous solution at a concentration of 3 percent by mass.

Abstract: A recording method includes a white ink attachment step, in which a white ink composition containing a white colorant is attached to a recording medium; a non-white ink attachment step, in which a non-white ink composition containing a non-white colorant is attached to overlap the attached white ink composition; a first treatment liquid attachment step, accompanying the white ink attachment step and in which a treatment liquid containing a flocculant is attached to the recording medium; and a second treatment liquid attachment step, accompanying the non-white ink attachment step and in which a treatment liquid containing a flocculant is attached to the recording medium. The white ink composition experiences a five-fold or greater increase in viscosity when mixed with a 7% by mass aqueous solution of calcium formate in a ratio by mass of 10:1, the white ink composition to the aqueous solution of calcium formate.

Abstract: A recording device includes: a first nozzle group including a plurality of nozzles configured to discharge, to a medium, a first dot that is a dot of a reaction liquid; a second nozzle group including a plurality of nozzles configured to discharge, to the medium to which the reaction liquid is discharged, a second dot that is a dot of ink containing a color material that coagulates with the reaction liquid; and a control unit configured to control discharging of the first dot by the first nozzle group and discharging of the second dot by the second nozzle group, in which the control unit controls arrangement, on the medium, of the first dot discharged by the first nozzle group so as to be more regular than arrangement, on the medium, of the second dot discharged by the second nozzle group.

Abstract: An ink set includes a reaction liquid containing coagulant; a first ink containing a color material; and a second ink containing a color material. The ink set is used for recording on a non-absorptive recording medium or a low-absorptive recording medium and for imparting the reaction liquid, the first ink, and the second ink to the recording medium in a superimposed manner in this order.

Abstract: An ink set includes a reaction liquid containing coagulant; a first ink containing a color material; and a second ink containing a color material. The ink set is used for recording on a non-absorptive recording medium or a low-absorptive recording medium and for imparting the reaction liquid, the first ink, and the second ink to the recording medium in a superimposed manner in this order.

Abstract: A recording method according to one embodiment of the present disclosure includes a treatment liquid attachment step of attaching a treatment liquid containing an aggregating agent to a recording medium, a white ink attachment step of ejecting a white ink composition containing a white coloring material from an ink jet head and attaching the white ink composition to the recording medium, and a non-white ink attachment step of ejecting a non-white ink composition containing a non-white coloring material from the ink jet head and attaching the non-white ink composition to the recording medium, the white ink composition and the non-white ink composition are aqueous inks, the white ink attachment step and the non-white ink attachment step are each performed by scanning in which the ink composition is ejected from the ink jet head and attached to the recording medium while the ink jet head is moved with respect to the recording medium in a state where a position is fixed, in the white ink attachment step, the whit

Abstract: Provided is an aqueous maintenance liquid for use in maintenance of an ink jet recording apparatus ejecting an ink composition. The ink composition is an aqueous ink composition containing a coloring material. The maintenance liquid contains an organic amine and an organic solvent other than the organic amine. The organic solvent contains Polyol A with a normal boiling point of 250° C. or lower. The content of Polyol A is greater than 20.0% by mass with respect to the total amount of the maintenance liquid. The content of the organic amine is 0.3% by mass or more with respect to the total amount of the maintenance liquid. The total content of the organic solvent is less than 30.0% by mass with respect to the total amount of the maintenance liquid. The organic solvent does not contain Polyol B with a normal boiling point of higher than 250° C. in an amount of greater than 1.0% by mass with respect to the total amount of the maintenance liquid.

Abstract: An ink composition is used for recording on a low-absorbing recording medium or a non-absorbing recording medium and is an aqueous ink jet ink containing a pigment, and the ink composition includes 1.2 to 2.9 percent by mass of an amine with respect to a total mass of the ink composition, and an organic solvent other than an amine. The organic solvent includes an organic solvent having a standard boiling point of 150° C. to 250° C. in an amount of 5 to 30 percent by mass with respect to the total mass of the ink composition, and the organic solvent having a standard boiling point of 150° C. to 250° C. includes a diol having a water mixture viscosity of 3.0 mPa·s or more.

Abstract: A recording method according to an embodiment of the present disclosure is a recording method to perform recording on a recording medium in a manner such that while a relative position between an ink jet head and the recording medium is transferred, a scan to eject an ink from the ink jet head so as to be adhered to the recording medium is performed a plurality of times for the recording. The method described above includes a step of adhering a treatment liquid containing an aggregating agent to the recording medium; a step of ejecting a color ink composition containing a colorant from the ink jet head so as to be adhered to the recording medium; and a step of ejecting a clear ink composition containing a resin from the ink jet head so as to be adhered to the recording medium.

Abstract: A recording method for performing recording on a recording medium includes a processing liquid attaching step of attaching a processing liquid including an aggregating agent to the recording medium, a white ink attaching step of attaching a white ink composition including a white coloring material to the recording medium, and a non-white ink attaching step of attaching a non-white ink composition including a non-white coloring material to the recording medium, in which attachment of the white ink composition and attachment of the non-white ink composition are performed by relative scanning of a recording head and the recording medium, and attachment of the white ink composition and attachment of the non-white ink composition are performed on a scanning region of the recording medium by a relative scanning.

Abstract: A recording method for recording on a recording medium, which is a non-white recording medium, includes a white ink adhering step of adhering a white ink containing a white coloring material to the recording medium, and a non-white ink adhering step of adhering a non-white ink containing a non-white coloring material to the recording medium, in which the white ink adhering step and the non-white ink adhering step are performed by causing a recording head to scan the recording medium, the white ink adhering step and the non-white ink adhering step are performed on a region of the recording medium by a scan, and the white ink adhering step and the non-white ink adhering step are performed such that, in the region where the white ink and the non-white ink are adhered, the mass ratio (A/B) of an adhesion amount A of the white coloring material to an adhesion amount B of the non-white coloring material per unit area is 0.03 or more and 0.99 or less.

Abstract: A recording method includes a white ink attachment step, in which a white ink composition containing a white colorant is attached to a recording medium; a non-white ink attachment step, in which a non-white ink composition containing a non-white colorant is attached to overlap the attached white ink composition; a first treatment liquid attachment step, accompanying the white ink attachment step and in which a treatment liquid containing a flocculant is attached to the recording medium; and a second treatment liquid attachment step, accompanying the non-white ink attachment step and in which a treatment liquid containing a flocculant is attached to the recording medium. The white ink composition experiences a five-fold or greater increase in viscosity when mixed with a 7% by mass aqueous solution of calcium formate in a ratio by mass of 10:1, the white ink composition to the aqueous solution of calcium formate.

Abstract: An ink set according to one embodiment of the present disclosure includes: a water-based ink composition containing a colorant; a first treatment liquid containing an aggregating agent; and a second treatment liquid containing an aggregating agent. In the ink set described above, a content of the aggregating agent in the first treatment liquid is 0.60 mol/kg or more, a content of the aggregating agent in the second treatment liquid is less than 0.60 mol/kg, the first treatment liquid is used together with the ink composition for recording on a recording medium which is a low-permeable substrate, and the second treatment liquid is used together with the ink composition for recording on a recording medium which is an impermeable substrate.

Abstract: A recording device includes: a first nozzle group including a plurality of nozzles configured to discharge, to a medium, a first dot that is a dot of a reaction liquid; a second nozzle group including a plurality of nozzles configured to discharge, to the medium to which the reaction liquid is discharged, a second dot that is a dot of ink containing a color material that coagulates with the reaction liquid; and a control unit configured to control discharging of the first dot by the first nozzle group and discharging of the second dot by the second nozzle group, in which the control unit controls arrangement, on the medium, of the first dot discharged by the first nozzle group so as to be more regular than arrangement, on the medium, of the second dot discharged by the second nozzle group.

Abstract: Disclosed is a recording method including attaching a reaction solution which forms a recording region S1 by attaching a reaction solution which includes an aggregating agent which is able to aggregate components of a color ink composition to a target recording medium with an attachment amount of 100 nmol/inch2 to 1500 nmol/inch2 of the aggregating agent, and attaching a color ink composition which forms a recording region S2 by attaching the color ink composition which includes a coloring material and a resin to the recording region S1 within 30 seconds of attaching the reaction solution.

Abstract: An ink jet recording method performs recording on a recording medium using a white ink composition, a non-white ink composition, and a treatment liquid containing an aggregating agent, the method including: a treatment liquid adhesion step of adhering the treatment liquid to the recording medium to form a treatment liquid layer; a non-white ink adhesion step of adhering the non-white ink composition to the recording medium by ejection thereof from an ink jet head to form a non-white ink layer; and a white ink adhesion step of adhering the white ink composition to the recording medium by ejection thereof from an ink jet head to form a white ink layer. The recording medium has a region in which the non-white ink layer, the white ink layer, and the treatment liquid layer are overlapped with each other, at least one of the ink compositions contains resin particles and a water-soluble resin, and the water-soluble resin has a glass transition temperature higher than that of a resin of the resin particles.