{HEAD ~ The printing device} includes a printing control unit that controls the printing processing so that a line graph representing the density change characteristic of a printing result by {TAIL ~ the printing head} draws a line with a gradient 
{ HEAD ~ The printing device } includes a printing control unit that controls the printing processing so that a line graph representing the density change characteristic of a printing result by { TAIL ~ the printing head } draws a line with a gradient
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH