An accurate way to find out the remaining ink in the cartridges is to print off a diagnostics sheet, which will include the ink remaining in each cartridge as a percentage (listed under LEFT CHUTE/RIGHT CHUTE on the printout).
An accurate way to find out the remaining ink in the cartridges is to print off a diagnostics sheet, which will include the ink remaining in each cartridge as a percentage (listed under LEFT CHUTE/RIGHT CHUTE on the printout).