Image formation apparatus

摘要

Provided is an image formation apparatus for printing pixel dots on a recording paper (33) at pitches smaller than intervals between ink jet-out ports by using an ink jet recording head (33) while moving the recording head in a rotation shaft direction and feeding a recording paper (25) around the drum so as to wind the drum. The ink jet recording head (33) has a plurality of ink jet-out ports arranged in line and is movable in a rotation shaft direction of the drum (22). In the case where the image formation is completed by two rounds of the drum, the recording head is shifted at the time the first drum rotation is completed, by a moving step amount determined so as to correspond to a specific feature of a human visual system, thereby suppressing image formation non-uniform in concentration. <IMAGE>