Liquid ejection apparatus, print method, and print system

A print method for printing using a print apparatus for printing on a print medium, wherein the print apparatus is provided with:

• a color nozzle column including nozzle groups for each color, the color nozzle column being arranged in a single line along an intersecting direction that intersects relative to a scanning direction in which a print head of the print apparatus is moved, and being configured to eject color inks of a plurality of colors;
• and a black ink nozzle column which is disposed in parallel with the color nozzle column in the intersecting direction in a position corresponding to the color nozzle column arranged in the single line along the intersecting direction and from which black ink is ejected, a length of the black ink nozzle column in the intersecting direction being the same as a length of the color nozzle column in the intersecting direction, wherein the black ink nozzle column is segmented into nozzle groups of the same number as the number of groups in the nozzle groups for the color inks;
• the print method further including
• conveying the print medium in a feed amount equivalent to the length, in the intersecting direction, of any one color nozzle group from among the color nozzle column, and executing one scan, either a forward path scan or a return path scan, of the print head every time the print medium is conveyed;
• and
• ejecting the color inks from the color nozzle column on both the forward path scan and the return path scan of the print head, and ejecting the black ink from the black ink nozzle column on only one scan, either the forward path scan or the return path scan, of the head.

A print system comprising a print apparatus for printing on a print medium, wherein the print apparatus is provided with:

• a color nozzle column including nozzle groups for each color, the color nozzle column being arranged in a single line along an intersecting direction that intersects relative to a scanning direction in which a print head of the print apparatus is moved, and being configured to eject color inks of a plurality of colors;
• and a black ink nozzle column which is disposed in parallel with the color nozzle column in the intersecting direction in a position corresponding to the color nozzle column arranged in the single line along the intersecting direction and from which black ink is ejected, a length of the black ink nozzle column in the intersecting direction being the same as a length of the color nozzle column in the intersecting direction, wherein the black ink nozzle column is are segmented into nozzle groups of the same number as the number of groups in the nozzle groups for the color inks;
• the print system also comprising a print control apparatus for controlling the print apparatus and causing same to print;
• wherein
• the print control system generates raster data for the color inks and raster data for the black ink in a range corresponding to all of the nozzle column for the color inks, and transmits to the print apparatus the raster data corresponding to the nozzle column, for the purpose of:
• in the print apparatus, conveying the print medium in a feed amount equivalent to the length, in the intersecting direction, of any one color nozzle group from among the color nozzle column, and executing one scan, either a forward path scan or a return path scan, of the print head every time the print medium is conveyed;
• and
• ejecting the color inks from the color nozzle column on both the forward path scan and the return path scan of the print head, and ejecting the black ink from the black ink nozzle column on only one scan, either the forward path scan or the return path scan, of the head.