An ink jet recording method includes a treatment liquid attachment step, in which a treatment liquid is attached to a recording medium, and an ink attachment step, in which a water-based ink composition is attached to the recording medium. An ink jet recording apparatus includes a recording medium support and a heating mechanism that heats the recording medium support. The ink attachment step is carried out with the recording medium supported and heated by the recording medium support. In the ink attachment step, the recording medium is heated so that a surface thereof reaches a maximum temperature of 28.0° C. or more and 45.0° C. or less. The ratio between absorbances A and B (A/B) is 0.5 or more and 0.95 or less, where absorbance A is that of a 0.1% by mass mixture of the water-based ink composition in the treatment liquid, and absorbance B is that of a 0.1% by mass mixture of the water-based ink composition in purified water. The recording medium support has a flat support surface for supporting the recording medium.

A recording method includes: ejecting colored ink compositions that include a light colored ink composition and a dark colored ink composition that belong to a same color system and have different color density from an ink jet head and causing the ink compositions to adhere to a recording medium; and causing a processing solution that contains a coagulant for coagulating constituents of the colored ink compositions to adhere to the recording medium, the causing of the ink compositions to adhere is performed by performing scanning, in which the colored ink compositions are ejected while a relative position of the ink jet head with respect to the recording medium is changed in a scanning direction, a plurality of times, and a width in the scanning direction of the recording medium is equal to or greater than 50 cm.

A recording method is for performing recording by ejecting, onto a recording medium, ink and a reaction solution including a flocculating agent that flocculates a substance contained in the ink, and the recording method includes ejecting the reaction solution as a droplet onto the recording medium, and ejecting the ink as a droplet onto the recording medium. A relationship of Op1≥Op2 is satisfied when an ejection amount of the reaction solution during ejecting the reaction solution in a first recording mode is indicated with Op1, and an ejection amount of the reaction solution during ejecting the reaction solution in a second recording mode is indicated with Op2, the second recording mode having a recording speed lower than the first recording mode.

A process for preparing a printed rigid plastic substrate is described, the process comprising: providing a rigid plastic substrate comprising a primer on a surface of the rigid plastic substrate, the primer comprising a primer resin; printing a liquid electrophotographic ink composition comprising a thermoplastic resin onto the primer on the surface of the rigid plastic substrate; depositing a cross-linking composition comprising a cross-linker onto the printed electrophotographic ink composition disposed on the primer; and laminating the rigid plastic substrate with a flexible film such that the ink composition and the cross-linker are disposed between the rigid substrate and the flexible film and wherein the lamination of the rigid substrate with the flexible film causes cross-linking of the thermoplastic resin of the ink composition and of the primer resin.

A method of manufacturing dyed paper, following a request for paper coloured in a specific Pantone®, the method comprising the steps of selecting coloured paper from an available supply which is dyed in a colour that is in the same colour category as the Pantone®, applying a white primer coating to at least one side of the selected paper, applying a layer of printable coating over the white primer coating; and printing a layer of the Pantone® colour requested on at least part of the printable coating.

Provided are compositions and processes formulated and practiced to reduce the friction-coefficient of the printed area and also of the non-printed areas around the image, wherein the compositions are formulated for use by wet-on-wet techniques in-line of the pre-curing printing process, without pretreating the fabric for softness and smoothness prior to the printing process. The compositions comprise at least 15% by weight of a friction-coefficient reduction agent and having a pH lower than 6.5 so as to effect upon contact immobilization of an ink composition that is being digitally applied on the substrate.

An ink set contains a pre-processing fluid comprising a multivalent metal ion, a first ink and a second ink, wherein the first ink has a surface tension of 35 mN/m or greater at 25 degrees C. and a life time of 150 ms, wherein the second ink has a surface tension of 35 mN/m or greater at 25 degrees C. and a life time of 150 ms and the second ink is a white ink.

Herein is described a piezo-jettable varnish composition comprising a latex polymer having a weight averaged molecular weight Mw of greater than about 50 000, a polymeric salt derived from an acidic polymer having a weight averaged molecular weight Mw in the range of about 1000 to about 50 000, water, and a co-solvent, wherein, the latex polymer and polymeric salt are present in amounts such that the ratio of latex polymer to polymeric salt by weight is in the range of greater than about 1:1 to about 8:1.

A printed material of the present invention is a printed material including a recording medium, a color material layer, and a fine irregular layer functioning as an outermost layer in this order; the color material layer contains a pigment; the fine irregular layer contains spherical particles having a specific average particle diameter; the spherical particles are present in a thickness direction of the fine irregular layer; and the surface of the fine irregular layer has convex portions having an average height of 0.04 to 0.15 m and an image definition C(2) is 50% or more.

An ink jet recording method includes a treatment liquid attachment step, in which a treatment liquid containing at least one flocculant is attached to a recording medium, and an ink attachment step, in which an aqueous ink composition is attached to the recording medium. The treatment liquid attachment step and the ink attachment step are performed through multiple main scans and multiple sub-scans. A main scan is a movement of a recording head in a main scanning direction, and a sub-scan is a movement of the recording medium in a sub-scanning direction, which crosses the main scanning direction. The recording head has a first ejecting nozzle group, which is a line of nozzles arranged in the sub-scanning direction and ejects the treatment liquid, and a second ejecting nozzle group, which is a line of nozzles arranged in the sub-scanning direction and ejects the aqueous ink composition. The first ejecting nozzle group overlaps, at least in a portion, the second ejecting nozzle group when projected in the main scanning direction. When the treatment liquid is tested using a rigid-body pendulum characteristics tester at 35.0 C. for 20.0 minutes, the minimum oscillation period of the rigid-body pendulum is 70.0% or more of the maximum oscillation period of the rigid-body pendulum.