(57) An ink jet recording apparatus (1) comprising a black ink recording head (13, 314K,
KN1-KN25) for spouting a black ink against a recording medium (2); a non-black ink
recording head (13, 314C, CN1-CN25) for spouting a non-black color ink different from
the black ink, against the recording medium; control means (32, 40) for commanding
the black and non-black ink recording heads to spout the black and non-black inks,
respectively, the control means including timer means (172; 176) for measuring a time
lapse after the non-black ink recording head (CN1) has last spouted the non-black
ink, and generating a request signal (R; R′) when the measured time lapse has exceeded
a reference time, the control means further including special operation command means
(173, 174; 177, 178, 179; S326) for commanding, when the request signal is generated
by the timer means, the non-black ink recording head (CN1) to effect a special ink
spouting operation by spouting the non-black ink at a position of recording of the
black ink recording head (KN1) on the recording medium.
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