Expression pattern of connexins in the corneal and limbal epithelium of a primate.

In the first embodiment, gradation reproduction with a same ink is performed by (i) setting as a unit of gradation reproduction a group of N contiguous pixels (where N is an integer of at least 2) arranged in the main scan direction or the sub scan direction; (ii) setting the volume of ink ejectable onto at least one pixel location of the N pixels to a value different from the volume of ink ejectable onto other pixel locations; and (iii) controlling the volume of ink at each pixel location of the N pixels to reproduce M gradation levels (where M is an integer of at least N+2) for each group of the N pixels. In the second embodiment, low-resolution image data are generated based on high-resolution image data when the print control device outputs printing data to the printing device, assuming that each group of high-resolution pixels adjacent to each other constitute one low-resolution pixel. The low-resolution image data are used to eject ink drops onto each high-resolution pixel.