The present invention relates to an ink set for ink-jet printing which contains at least a water-based ink (I) and a water-based ink (II) in which the water-based ink (I) contains a pigment (A1) having a barbituric acid-derived structure, and the water-based ink (II) contains a diketopyrrolopyrrole pigment (A2), an ink-jet printing method using the ink set, and an ink-jet printed material.

The present invention relates to an ink set for ink-jet printing which contains at least a water-based ink (I) and a water-based ink (II) in which the water-based ink (I) contains a pigment (A1) having a barbituric acid-derived structure, and the water-based ink (II) contains a diketopyrrolopyrrole pigment (A2), an ink-jet printing method using the ink set, and an ink-jet printed material.

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for generating, based on a portrait image, a foreground image mask to indicate foreground pixels of the portrait image; identifying a percentage of white or near white pixels in the foreground by using the foreground image mask and pixel colors in the portrait image; determining whether the percentage of white or near white pixels in the foreground is larger than a predefined threshold; in response to determining, triggering identification of edge pixels in a background of the portrait image; adjusting white background pixels to add shadows by darkening the white background pixels; and adjusting the white or near white pixels in the foreground by darkening the white or near white pixels.

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for generating, based on a portrait image, a foreground image mask to indicate foreground pixels of the portrait image; identifying a percentage of white or near white pixels in the foreground by using the foreground image mask and pixel colors in the portrait image; determining whether the percentage of white or near white pixels in the foreground is larger than a predefined threshold; in response to determining, triggering identification of edge pixels in a background of the portrait image; adjusting white background pixels to add shadows by darkening the white background pixels; and adjusting the white or near white pixels in the foreground by darkening the white or near white pixels.

The present disclosure is drawn to coalescent inks and material sets for 3D printing. The coalescent ink can include an organic-soluble near-infrared dye having a peak absorption wavelength from 800 nm to 1400 nm. The coalescent ink can also in water and an organic co-solvent.

An ink jet recording method includes: a step of forming an image by ejecting liquid droplets of an aqueous color ink to a recording medium; and a step of forming a coating ink layer by ejecting liquid droplets of an aqueous coating ink on the image, and in the ink jet recording method described above, the aqueous color ink is ejected in the form of a plurality of liquid droplets having different liquid droplet amounts per one droplet, and the aqueous coating ink is ejected to have a liquid droplet amount per one droplet smaller than a liquid droplet amount of a smallest liquid droplet of the aqueous color ink.

An ink-jet ink printing method and associated system can have a printer including an ink-jet ink. The ink includes an aqueous liquid vehicle, 1 wt % to 5 wt % pigment, 1 wt % to 5 wt % acrylic polymer particles, 0.3 wt % to 3 wt % urethane polymer particles, and is formulated to print on a vinyl medium. The system also includes a heating device. Upon applying heat to the ink-jet ink printed on the vinyl medium, the polymer particles in the printed ink fuse, and form a film encapsulating at least a portion of the pigment on the vinyl print medium.

An ink-jet ink printing method and associated system can have a printer including an ink-jet ink. The ink includes an aqueous liquid vehicle, 1 wt % to 5 wt % pigment, 1 wt % to 5 wt % acrylic polymer particles, 0.3 wt % to 3 wt % urethane polymer particles, and is formulated to print on a vinyl medium. The system also includes a heating device. Upon applying heat to the ink-jet ink printed on the vinyl medium, the polymer particles in the printed ink fuse, and form a film encapsulating at least a portion of the pigment on the vinyl print medium.

An inkjet ink that contains a functional particle having a BET-equivalent particle diameter of 50 to 1000 nm, a rheology-controlling particle having a BET-equivalent particle diameter of 4 to 40 nm, and an organic vehicle. The ink has a viscosity of 1 to 50 mPa.Math.s at a shear rate of 1000 s.sup.−1. At a shear rate of 0.1 s.sup.−1, the ink has a viscosity equal to or higher than a viscosity η calculated using the following equation: η=(D).sup.2×ρ/10.sup.4/2+80 [where η is the viscosity (mPa.Math.s) at a shear rate of 0.1 s.sup.−1, D is the BET-equivalent particle diameter (nm) of the functional particle, and ρ is the specific gravity of the functional particle].

An inkjet ink that contains a functional particle having a BET-equivalent particle diameter of 50 to 1000 nm, a rheology-controlling particle having a BET-equivalent particle diameter of 4 to 40 nm, and an organic vehicle. The ink has a viscosity of 1 to 50 mPa.Math.s at a shear rate of 1000 s.sup.−1. At a shear rate of 0.1 s.sup.−1, the ink has a viscosity equal to or higher than a viscosity η calculated using the following equation: η=(D).sup.2×ρ/10.sup.4/2+80 [where η is the viscosity (mPa.Math.s) at a shear rate of 0.1 s.sup.−1, D is the BET-equivalent particle diameter (nm) of the functional particle, and ρ is the specific gravity of the functional particle].