An inkjet printer cannot run without any ink. it is used in a lot of ways throughout the printing process.. The printer uses it for printing photos and other documents.. but not all of the ink is used for printing some are allotted for the maintenance of the printer's print head while some of the ink evaporates. There are varying usage of ink but its quite common for all kinds of printers.. However, print cartridges like this hp CC640WN oem inkjet cartridge
yields vary from each kinds of printers..