A print unit includes a reactive liquid element row in which a plurality of print elements are arrayed in a first direction, a first element row in which a plurality of print elements are arrayed in the first direction, and a second element row in which a plurality of print elements are arrayed in the first direction. The reactive liquid element row, the first element row, and the second element row are arrayed in this order in a second direction perpendicular to the first direction. A scan unit scans the print unit in the second direction. A print control unit controls a print operation by the print unit such that a ratio of the number of pixels permitted to eject the second ink to the number of pixels in a predetermined region on the print medium does not exceed a threshold.

There is provided a method for rendering an image according to selected image quality attributes. Two or more image quality attributes are selected from a plurality of attributes of the image. A set of pigments for an area of the image and a density for each pixel of the area are determined. A quantity of pretreatment for deposition onto a print target is determined, where the pretreatment quantity is dependent on the pigments, the density, and the selected image quality attributes.

A recording method includes: ejecting colored ink compositions that include a cyan ink composition, a magenta ink composition, a yellow ink composition, and a special color ink composition with a hue angle different from hue angles of the respective ink compositions from an ink jet head and causing the ink compositions to adhere to a recording medium; and causing a processing solution containing 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 maximum distance of scanning performed once in the causing of the ink compositions to adhere is equal to or greater than 50 cm.

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.

There is provided a method for rendering an image according to selected image quality attributes. Two or more image quality attributes are selected from a plurality of attributes of the image. A set of pigments for an area of the image and a density for each pixel of the area are determined. A quantity of pretreatment for deposition onto a print target is determined, where the pretreatment quantity is dependent on the pigments, the density, and the selected image quality attributes.

A printing method includes determining the upper limit of the amount of the ink to be discharged based on a color saturation suppression upper limit, and at least one of an overflowing suppression upper limit, a bleeding suppression upper limit, and an aggregation suppression upper limit. The determining of the upper limit of the amount of the ink to be discharged includes setting in advance priorities among the suppressing of the color saturation of the ink and at least one of the overflowing of the ink, the bleeding of the ink, and the aggregation of the ink, and determining the upper limit of the amount of the ink to be discharged based on the priorities.

A printing method includes determining the upper limit of the amount of the ink to be discharged based on a color saturation suppression upper limit, and at least one of an overflowing suppression upper limit, a bleeding suppression upper limit, and an aggregation suppression upper limit. The determining of the upper limit of the amount of the ink to be discharged includes setting in advance priorities among the suppressing of the color saturation of the ink and at least one of the overflowing of the ink, the bleeding of the ink, and the aggregation of the ink, and determining the upper limit of the amount of the ink to be discharged based on the priorities.

A printing apparatus includes a printing section, an imaging section, a color measurement section, and a discharge amount upper limit determining section. The imaging section is configured to capture an image of a test medium on which a test pattern has been printed. The color measurement section is configured to execute color measurement on the test medium. The discharge amount upper limit determining section is configured to determine an upper limit of an amount of ink to be discharged based on at least one of a color saturation suppression upper limit calculated based on color measurement information of the test medium obtained by the color measurement section and at least one of an overflowing suppression upper limit, a bleeding suppression upper limit, and an aggregation suppression upper limit calculated based on imaging information of the test medium obtained by the imaging section.

A recording method includes: ejecting colored ink compositions that include a cyan ink composition, a magenta ink composition, a yellow ink composition, and a special color ink composition with a hue angle different from hue angles of the respective ink compositions from an ink jet head and causing the ink compositions to adhere to a recording medium; and causing a processing solution containing 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 maximum distance of scanning performed once in the causing of the ink compositions to adhere is equal to or greater than 50 cm.

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.