Ink droplets can be placed with a pitch of 1/9600 inch at minimum.

You need to install ink cartridges of all colours whether you perform black and white printing or colour printing. If any one of the ink cartridges is not installed, an error occurs and you cannot perform printing.

Depending on the paper or the print settings, colour ink may be consumed even when you print a document in black or perform printing in black and white. When any one of the colours of ink has run out, you need to replace the ink cartridge.

When you use the Canon printer for the first time after you install the bundled ink cartridges, the printer consumes a small amount of ink in the amount to enable printing by filling the nozzles of the Print Head with ink. For this reason, the number of sheets that can be printed with the first set of ink cartridges is fewer than the succeeding set of ink cartridges.

The printing costs described in the brochures or websites are based on the consumption data from not the first set of ink cartridges but the succeeding set of ink cartridge.

To keep printer's performance, Canon printer performs cleaning automatically according to its condition. When the printer performs cleaning, a small amount of ink is consumed. In this case, all colours of ink may be consumed.
[Cleaning function]
The cleaning function helps the printer to suck air bubbles or ink itself from the nozzle and thus prevents print quality degradation or nozzle clogging.

The repairing parts for printers will be available five years after production is discontinued. Depending on your model, we may ask you to replace it with a new one, or one with almost the same performance as a maintenance service. In this case, it may be that you cannot use supplies or accessories for your model or the compatible OS will be changed.

The warranty term for free repair varies from country to country and starts from the date of purchase.  
Ink cartridges sold are generally meant for use with printers sold in the same region. The ink cartridges may bear unique labels or configurations and may not be compatible for use with printers sold in another region. To ensure optimal performance of your printer, please check with your local Canon office or authorised Canon reseller before relocating your printer from the location of purchase.

To obtain good printing quality, use up ink within six months after opening.

Regarding a solution to a problem caused by using non-genuine ink cartridges (including ones supplemented with non-genuine ink by making a hole in the cartridge or so), a fee will be charged even within the warranty term. Keep this in your mind when you use non-genuine ink.

If you use non-genuine ink cartridges (including ones supplemented with non-genuine ink by making a hole in the cartridge or so), they may have a negative effect on the performance of the printer or the printing quality may be reduced. In addition, though it is a rare case and does not present a safety hazard, it is reported that a print head will become heated or smoke will be emitted from it due to an ingredient not contained in genuine Canon ink.
(Note that this does not apply to all non-genuine ink.)