- Joined
- Nov 27, 2010
- Messages
- 5,113
- Reaction score
- 4,976
- Points
- 373
- Location
- Copenhagen Denmark
- Printer Model
- Canon MP990
At power on and at some intervals determined by timers and counters most or maybe all inkjet printers do a printhead cleaning. All nozzles are cleaned, both black and colours. This consumes ink from all cartridges, even if you only do black and white printing. So all inks are needed also for black and white only printing.