Canon i475D Series Quick Start Manual page 45

Printing Maintenance
3
Prepare a replacement ink tank.
(1) Unpack a new ink tank and remove the orange protective cap.
Important
4
Insert the ink tank.
(1) Insert a new ink tank into a slot.
(2) Push in the tab until the ink tank snaps firmly into place.
Note
40
Do not re-attach the protective cap once you have removed it.
Once the protective cap is removed, do not touch the open ink port.
To maintain optimal print quality, use an ink tank within six months
of its first use.
Once an ink tank has been used, do not remove it from the printer
and leave it out in the open. This will cause the ink tank to dry out
and the printer may not function properly if it is reinstalled.
Color ink consumption may occur even when black-and-white or
grayscale printing is specified.
Color ink is consumed in the head cleaning and deep cleaning,
which are necessary to maintain the printer's capabilities.
When an ink tank runs out of ink, replace the ink tank with a new one
immediately.
If printing is continued with no ink in the ink tank, a problem may
occur.