Liquid ejecting apparatus and method for determining liquid depletion to maintain a pressure differential between an ink jet head and ink cartridge

A liquid-ejecting apparatus comprising:

• a liquid-ejecting section that ejects a liquid onto an object;
• a liquid container containing the liquid, the liquid container supplying a predetermined amount of liquid to the liquid-ejecting section by a pressure corresponding to an amount of ink remaining in the liquid container;
• and
• a depletion-determining section that determines depletion of the liquid depending on temperature;
• wherein
• the liquid has a first viscosity at a first temperature and a second viscosity lower than the first viscosity at a second temperature higher then the first temperature;
• the depletion-determining section defines an ink depletion threshold depending on temperature;
• and
• the amount of ink remaining in the reservoir is different depending on temperature when the depletion-determining section determines the ink depletion.