A liquid jetting apparatus includes a recording head unit including nozzles; a moving mechanism configured to alternately perform a scanning operation of moving the recording head unit in a scanning direction while causing the recording head unit to discharge a liquid and a sub-scanning movement operation of moving the recording head unit or the recording medium in a sub-scanning direction without causing the recording head unit to discharge the liquid; a gradation setting unit configured to set gradation on portions of image data corresponding to setting regions at ends of the recording head unit; an irregular pattern setting unit configured to set an irregular pattern on the image data to randomize a dot ratio indicating the number of dots per unit area; and a head discharge drive unit configured to cause the nozzles to discharge the liquid based on the image data.

Provided is a method for producing at least one carrier material provided with a print decoration. The print decoration is applied to the at least one carrier material by means of digital printing. The water-soluble CRYK ink used for the digital printing has the following composition: Colour component C: at least one cyan pigment; Colour component K: at least one black carbon pigment; Colour component Y: at least one yellow pigment; or a mixture of at least two different yellow pigments or a mixture of at least one yellow pigment and at least one red pigment; and Colour component R: at least one red pigment, or a mixture of at least two different red pigments or a mixture of at least one red pigment and at least one yellow pigment.

A printing method in which a primer composition, which includes at least one pigment aggregating agent, is applied to a coated substrate prior to an ink-jet printing step. The ink-jet printing step is performed using inkjet droplets having x μm drop diameter, printed in a print resolution on the coated substrate that corresponds to a rectangular unit cell having cell dimensions of y μm by z μm, where a ratio of x/y is >0.60.

A printing method in which a primer composition, which includes at least one pigment aggregating agent, is applied to a coated substrate prior to an ink-jet printing step. The ink-jet printing step is performed using inkjet droplets having x μm drop diameter, printed in a print resolution on the coated substrate that corresponds to a rectangular unit cell having cell dimensions of y μm by z μm, where a ratio of x/y is >0.60.

An ink set for single-pass printing including at least a cyan ink, a magenta ink, a yellow ink, and a gray ink, wherein the magenta ink satisfies a specific condition regarding spectral reflectance, and the gray ink has a spectral reflectance at a wavelength of 500 nm of 20 to 70% and satisfies the specific condition regarding spectral reflectance.

A system is disclosed. The system includes at least one physical memory device to store compensation logic and one or more processors coupled with the at least one physical memory device to execute the compensation logic to generate first ink deposition function representing a first output ink amount versus input digital count for each of a plurality of color planes, generate second ink deposition function representing a second output ink amount versus input digital count for each of the plurality of color planes and generate transfer functions for each of the plurality of color planes based on the first ink deposition function and the second ink deposition function, wherein the transfer functions transform input digital counts.

A system is disclosed. The system includes at least one physical memory device to store compensation logic and one or more processors coupled with the at least one physical memory device to execute the compensation logic to generate first ink deposition function representing a first output ink amount versus input digital count for each of a plurality of color planes without pel forming element artifacts, generate second ink deposition function representing a second output ink amount versus input digital count for each of the plurality of color planes with the pel forming element artifacts and generate compensated halftones for each of the plurality of color planes based on the first ink deposition function and the second ink deposition function.

An ink set includes a white ink and a color ink. The white ink and the color ink each independently include water-dispersible resin particles, and a blocked isocyanate compound. A resin of the water-dispersible resin particles includes a crosslinkable functional group. The blocked isocyanate compound includes a functional group that can crosslink with the resin of the water-dispersible resin particles. An absolute value of a difference in static surface tension between the white ink and the color ink at 25° C. is 1.0 mN/m or less. Absolute values of differences in dynamic surface tension between the white ink and the color ink at 25° C. with bubble lifetime of 15 msec, a bubble lifetime of 150 msec, and a bubble lifetime of 1,500 msec are each independently 1.0 mN/m or less. The bubble lifetime is measured according to the maximum bubble pressure method.

Examples describe maintenance scheduling of printhead in an image forming device by monitoring image data processed by an image forming device, determining that the image data processed by the image forming device comprises color image data, and generating a firing signal based on a mode of the image forming device.

A white ink jet ink composition according to the present disclosure includes hollow resin particles, resin particles, and water. The hollow resin particles have a glass transition temperature of 120° C. or more, the resin particles are composed of an acrylic resin or a urethane resin, and the content of the resin particles is 5% by mass or more relative to the total mass of the ink composition.