A digital printing process for printing an image (I) including a white area (W) and/or a coloured area (C) on a packaging material includes selecting a packaging material with a substantially white side, and preparing print data to be sent to a printing means taking into account that the side of the packaging material is substantially white. The print data represents one or more first image areas (A1) representing the image (I), and one or more second image areas (A2) representing a packaging look (L), to be printed on the substantially white side of the packaging material, outside the one or more first image areas (A1) where the image (I) is to be located. The method further includes printing by the printing means on the substantially white side of the packaging material using the print data.

An inkjet printing device includes a stage; an inkjet head disposed above the stage and comprising nozzles through which ink is discharged, the ink including bipolar elements extending in a direction; an ink circulation part which supplies the ink to the inkjet head, and to which the ink remaining after being discharged from the inkjet head is supplied; and at least one sensing part disposed between the inkjet head and the ink circulation part and sensing a number of the bipolar elements that are discharged through the nozzles.

An inkjet printing apparatus 1 includes an ink-jet head 23 that ejects UV curable ink to a medium M, an irradiation lamp 25 that irradiates the UV curable ink ejected to the medium M with ultraviolet rays, and a heater 37 that heats the UV curable ink after the ultraviolet ray irradiation by the irradiation lamp 25 and thereby stabilizes color fixation of the UV curable ink. The UV curable ink after the ultraviolet ray irradiation is heated at least at 35° C.

Provided is an image printing method including a first processing fluid applying step of applying a first processing fluid containing a multivalent metal salt to a predetermined region of a print medium, and a second processing fluid applying step of applying a second processing fluid containing a resin emulsion containing an anionic functional group to the predetermined region of the print medium to which the first processing fluid is applied and any other region of the print medium to which the first processing fluid is not applied.

A radiation-curable ink jet composition contains a polymerizable compound, a white pigment, and inorganic particles different from the white pigment. The polymerizable compound includes a monofunctional polymerizable compound. The content of the monofunctional polymerizable compound is 80 mass % or more with respect to the total mass of the polymerizable compound contained in the radiation-curable ink jet composition.

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 sheet construction including a first material, and methods of making and using the same. The first material can include a leading edge, a trailing edge, a first longitudinal edge, and a second longitudinal edge. The first material can define a first print-receptive medium. The sheet construction can also include a leading margin extending from the first longitudinal edge to the second longitudinal edge and bounded at least by the leading edge, the first longitudinal edge, the second longitudinal edge, and the print-receptive medium. The sheet construction can also include a first side margin bounded at least in part by the leading margin, the first longitudinal edge, and the first print-receptive medium. The first side margin can include at least one compressed region.

A sheet construction including a first material, and methods of making and using the same. The first material can include a leading edge, a trailing edge, a first longitudinal edge, and a second longitudinal edge. The first material can define a first print-receptive medium. The sheet construction can also include a leading margin extending from the first longitudinal edge to the second longitudinal edge and bounded at least by the leading edge, the first longitudinal edge, the second longitudinal edge, and the print-receptive medium. The sheet construction can also include a first side margin bounded at least in part by the leading margin, the first longitudinal edge, and the first print-receptive medium. The first side margin can include at least one compressed region.

An image is formed on a transfer medium comprising a hydrophilic tackifier. Any portion of the image that is dimensionally insufficient to permanently adhere the image to the receiver substrate is determined, and a colorless liquid ink comprising water is applied to cover and surround the portion of the image that is dimensionally insufficient to permanently adhere the image to the receiver substrate. When heat is applied to the image to transfer the image layer to a receiver substrate, water in the image layer swells the image layer and the hydrophilic tackifier becomes sufficiently tacky to permanently adhere the image to the receiver substrate.

An image is formed on a transfer medium comprising a hydrophilic tackifier. Any portion of the image that is dimensionally insufficient to permanently adhere the image to the receiver substrate is determined, and a colorless liquid ink comprising water is applied to cover and surround the portion of the image that is dimensionally insufficient to permanently adhere the image to the receiver substrate. When heat is applied to the image to transfer the image layer to a receiver substrate, water in the image layer swells the image layer and the hydrophilic tackifier becomes sufficiently tacky to permanently adhere the image to the receiver substrate.