Canon BJC-250 - Manual (Page 67)

3
Return the paper support and paper output tray to their original positions. Close the
front cover.
4
Do not remove the BJ cartridge from the printer or ship a BJ cartridge
from which you have removed the protective cap. An opened BJ cartridge
that is not installed in the printer may leak, and the print head may dry out. Also,
if you do not tape the BJ cartridge to the side of the printer, ink may spill into the
printer. Repack the
printer in
its original
packing
materials.