(From: Paul Weber (email@example.com).)
|Printer and Photocopier Troubleshooting and Repair Collection : Ink cartridge expiration dates
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One other thing about HP inkjet printers (DJ 550, 560, 850): Before you buy an
ink cartridge, look at the expiration date on the box. Don't buy it unless
you expect to use it before the printed date. That number really means that
the cartridge will NOT work after the date...no matter how it is stored.
Water and/or hot water rejuvenation rarely works on cartridges that are
outdated. The reservoir evidently turns to crap and won't wick the water in
or the ink out.