If the manufacturer provides long term storage instructions, I would
follow them.
If they do not, each brand should be considered individually, as they
use different technologies and designs.
There are three basic designs used:
Permanent head
Semi permanent head
Head integrated into the ink cartridge
Permanent head: These printers include all Epson inkjet models, most
Brother, some HP and many high end professional models. They will
probably indicate somewhere that they use piezo electric heads. These
heads typically are not removable from the printer, and are designed to
last the life of the printer.
These printers will develop clogged heads if the ink is left in them
over long periods. Worse still if ink cartridges are removed, allowing
the heads to dry out.
If the printer will be stored for a matter of a few months, it is
probably best to leave the ink cartridges installed, to add some water
to saturate the cleaning/parking station just before shutting the
printer down for the last time prior to storage. Allow the printer to
shut down in its normal fashion, and then unplug it. Keep it upright.
Wrap it is a large plastic bag placing a small plastic container next to
the printer, but inside the plastic bag into which you have placed a
dish washing sponge which is saturated with water. Make sure that
container will remain upright so the water cannot spill. Seal the
plastic bag with printer and plastic container with sponge within it, to
help retain a high moisture level.
For longer storage, you will need to purge the ink from the heads using
cleaning cartridges which have on ink in them but only cleaning fluid.
Print all colors until the fluid coming from the heads is completely
clear without color printing. At that point the heads should be clean
of ink and less likely to clog if left unused for long periods. Once
they are well purged you can remove the cleaning cartridges and allow
the printer to be stored without any ink cartridges connected. Keep the
printer out of dusty locations and store in a good plastic bag.
The ink filled cartridges should be stored in well sealed plastic bags
such as Zip-lock type. Use two bags per cartridge on inside of the other
to reduce evaporation, Since plastic of that type can allow water vapor
through.
==============
Semi Permanent head: These printers include some HP, most "i" class
Canon printers, most current Kodak printers and some higher end models.
The head has a limited life span and will fail prior than the printer
lifespan. They typically last about 8-15 ink cartridges before
requiring replacement.
With these printers, the head and ink cartridges are separate, and the
head is removable from the printer.
If you can acquire cleaning cartridges, use them in replacement of the
colored ones to purge the ink from the head, by printing until the "ink"
coming from them is clear and uncolored.
If you do not have access to cleaning cartridges, remove the ink
cartridge and store as discussed above, then remove the semi-permanent
head and clean it well by soaking in rubbing alcohol or ammoniated
window cleaner and rubbing alcohol, until the liquid is clear and color
less. You may wish to use wet quality paper towels to help draw the
colored inks from the head. Some people find using compressed air with
Canon heads helps to clear out the ink. Shake the head clear of all
liquid and allow to dry and then package in a sealed plastic bag.
===================
Integrated cartridge and head: Some older Canon, most Lexmark and HP
printers use a cartridge which holds both ink chambers and the head
integrated. These are typically considered disposable cartridges, and a
new head is provided with each new cartridge. These heads may last a
number of refillings, but are not designed for long term us.
With these printers, the printer itself is under no risk from long term
storage. It is likely worthwhile to remove the cartridge/head unit and
place it in a double layer of well sealed plastic bags, perhaps with a
quality paper towel which is dampened but rung out. I would not place
the wet toweling directly on the printing surface of the head as it may
cause corrosion over time. If worse comes to worse, and the head or
cartridge become clogged or damaged, they can both be replaced at the
expense of a new ink cartridge.
Art
If you are interested in issues surrounding e-waste,
I invite you to enter the discussion at my blog:
http://e-trashtalk.spaces.live.com/