35Toner Cartridge YieldThe main factor affecting toner cartridge yield is the printed area of adocument. The graph above is a representation of how the number ofcopies per cartridge decreases as the printed area increases.Other factors which can affect the toner cartridge yield are:• The size of the document being copied.• Dark backgrounds.• Leaving the platen cover open.• The number of times the copier is switched on and off.• Double sided copying.• High humidity.Low printed Medium High printed Very high printedarea area area area