An inkjet printer includes an ink head, a carriage, and a first discharge controller. The ink head discharges photo-curable ink onto a recording medium. The ink head includes a colored ink nozzle group to discharge colored photo-curable ink, and a transparent ink nozzle group to discharge transparent photo-curable ink. The carriage is equipped with the ink head. The first discharge controller is configured or programmed to, when either one of the carriage and the recording medium makes a single movement, cause the colored ink nozzle group and the transparent ink nozzle group to discharge the colored photo-curable ink and the transparent photo-curable ink, respectively, onto a predetermined region so as to form a colored image and a texture image. The texture image includes the colored photo-curable ink and the transparent photo-curable ink that overlap with each other.

The present invention provides an ink jet recording method capable of recording an image having good abrasion resistance by using an aqueous ink and a reaction liquid. In the ink jet recording method, the aqueous ink containing a resin particle and the reaction liquid containing a reactant for aggregating the component in the aqueous ink are ejected from a recording head of the ink jet system and applied onto a recording medium. The reaction liquid contains a compound represented by the general formula (1) (n in the formula represents an integer of 0 to 3). At least one of the aqueous ink and the reaction liquid contains a surfactant having an HLB value of ≤ 15.

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A printing system is disclosed. The printing system includes at least one physical memory device to store calibration logic and one or more processors coupled with the at least one physical memory device to execute the calibration logic to perform uniformity compensation, including receiving print image measurement data corresponding to primary color markings and secondary color markings printed by pel forming elements, wherein each of the pel forming elements is associated with one of a plurality of primary colors, generating a first set of transfer functions based on the print image measurement data, wherein the first set of transfer functions includes a transfer function for each of the pel forming elements associated with a primary color, generating a second set of transfer functions based on the print image measurement data, wherein the second set of transfer functions includes transfer functions for each of the pel forming elements associated with a plurality of secondary colors, generating a set of inverse transfer functions for each of the pel forming elements based on the first set of transfer functions and the corresponding second set of transfer functions and generating a uniformity compensated halftone design based on the set of inverse transfer functions and a first halftone design.

An inkjet printing apparatus includes an ink tank that contains an ink to be supplied to a printing head that ejects the ink, the ink being injected from an ink bottle. The inkjet printing apparatus further includes an injection assistance member including a first passage and a second passage. The first passage is defined by a first upper end portion opening toward the outside of the ink tank and a first lower end portion opening toward the inside of the ink tank. The second passage is defined by a second upper end portion opening toward the outside of the ink tank and projecting upward less than the first upper end portion and a second lower end portion opening toward the inside of the ink tank and larger than the first lower end portion in terms of a distance from the bottom surface of the ink tank.

An inkjet printing apparatus includes an ink tank that contains an ink to be supplied to a printing head that ejects the ink, the ink being injected from an ink bottle. The inkjet printing apparatus further includes an injection assistance member including a first passage and a second passage. The first passage is defined by a first upper end portion opening toward the outside of the ink tank and a first lower end portion opening toward the inside of the ink tank. The second passage is defined by a second upper end portion opening toward the outside of the ink tank and projecting upward less than the first upper end portion and a second lower end portion opening toward the inside of the ink tank and larger than the first lower end portion in terms of a distance from the bottom surface of the ink tank.

An object is to enable highly accurate density unevenness correction while suppressing a reduction in productivity of printing accompanying correction value calculation for density unevenness correction. In the image processing apparatus, density correction information that specifies an output tone value for implementing a target density for an input tone value for each nozzle and which does not include the influence by a non-ejectable nozzle that cannot eject ink normally is acquired. In a case where a non-ejectable nozzle is detected during printing processing, output tone values corresponding to the detected non-ejectable nozzle and peripheral nozzles thereof among output tone values specified in the density correction information are changed.

A printing unit that prints an inspection image, a reading unit that reads the inspection image printed by the printing unit, and an analysis unit that performs analyzation based on a reading result read by the reading unit are provided. The inspection image includes an inspection pattern of a plurality of colors, the inspection pattern including a first position detection mark printed in a first color, a second position detection mark printed in the first color, and a second color inspection pattern printed in a second color different from the first color, the printing unit prints the second color inspection pattern at a position adjacent to the first position detection mark, and the analysis unit specifies a first position of the first position detection mark in a first region, and specifies a second position of the second position detection mark in a second region smaller than the first region.

A printing apparatus comprises: a print head comprising, for each of a plurality of types of inks, an ejection opening and pressure chamber, and configured to perform printing operation by ejecting the ink from the ejection opening; a circulation unit capable of circulating the ink of each ink type; a determination unit configured to determine an accumulated time for which a first type of ink is circulated by the circulation unit in the printing operation using the first type of ink and not using a second type of ink different from the first type of ink; and a control unit configured to perform control based on the determined accumulated time to cause the circulation unit to circulate at least the second type of ink among the plurality of types of inks in a case where the accumulated time is longer than a predetermined time.

A friction reduction system for reducing friction of an intermediate transfer member (ITM) of a printing system, while the ITM is guided along the printing system by a guiding arrangement. The friction reduction system includes a fluid reservoir mounted within the printing system, a fluid depositing arrangement disposed along the ITM, and a control mechanism, adapted to control depositing of fluid, from the fluid depositing arrangement onto the guiding arrangement or onto at least a portion of the ITM. Depositing of the fluid reduces friction between the ITM and the guiding arrangement.

An ejection device includes: an ejection unit provided with an ejection port configured to eject an ejection material; a piezoelectric element configured to cause the ejection material to be ejected from the ejection unit; a first liquid chamber connected to the ejection unit and configured to supply the ejection unit with the ejection material; a pressure control unit configured to control a pressure in the ejection unit by controlling a pressure in the first liquid chamber; and a detection unit configured to detect a wetness of an ejection port side surface.