The timing of discharge of ink from the printing head is corrected to cancel out the determined amount of variation, and {HEAD ~ printing} is performed based on {TAIL ~ image data} in accordance with the corrected timing 
is performed based on
The timing of discharge of ink from the printing head is corrected to cancel out the determined amount of variation , and { HEAD ~ printing } is performed based on { TAIL ~ image data } in accordance with the corrected timing
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH