38Toner Cartridge YieldThe main factor affecting toner cartridge yield is the printed area of adocument. The graph is a sample 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 will use more toner per ream of paper.• High humidity.To get the most from your toner cartridge:• Always copy with the document cover closed.• Leave the copier on during the day. Switch off the copier at the endof the working day.• Copy with the exposure control set to Auto exposure unless you needto adjust for the background of your original.• Operate the copier in a dry environment whenever possible.Low printed Medium High printed Very high printedarea area area area