Canon Pixma iP4300 - Manual (Page 95)

91 Safety Precautions
Print Heads and ink
tanks For safety reasons, store Print Heads and ink tanks out of the reach of small children.
If a child ingests any ink, consult a doctor immediately.
Do not shake Print Heads or ink tanks.
Ink may leak out and stain clothing or the surrounding area.
Never touch the electrical contacts on a Print Head after
printing. The metal parts may be very hot and could cause
burns.
Do not throw ink tanks into fire.