Charge control-type inkjet printer and printing method using same

A charge control-type inkjet printer, comprising:

• a printing head including a nozzle unit for discharging ink;
• a pressure reduction valve that adjusts a pressure of ink to be supplied to a nozzle unit of the printing head;
• an ink container for containing ink to be supplied to the nozzle unit of the printing head;
• an image processing unit that processes an image of the ink discharged from the nozzle unit and being in a particulate state, the image of the ink being obtained by imaging;
• wherein the charge control-type inkjet printer further comprises an imaging unit that images the ink discharged from the nozzle unit and being in a particulate state;
• and
• wherein the image processing unit compares the image of the ink discharged from the nozzle unit and being in a particulate state, the image of the ink being obtained by imaging by the imaging unit, and an image stored in advance and outputs abnormality information when detecting an abnormality in the particulate state.