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Printer and Photocopier Troubleshooting and Repair Collection : Ink cartridge expiration dates          
 Copyright © 1994-2007, Samuel M. Goldwasser. All Rights Reserved. Reproduction of this document in whole or in part is permitted if both of the following conditions are satisfied: 1. This notice is included in its entirety at the beginning. 2. There is no charge except to cover the costs of copying. I may be contacted via the Sci.Electronics.Repair FAQ (www.repairfaq.org) Email Links Page.
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Ink cartridge expiration dates

(From: Paul Weber (webpa@aol.com).)

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 Water and/or hot water rejuvenation rarely works on cartridges that are outdated.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.