[Ralfp]

Vendors actually hard-code "I'm dry and won't print anymore" kill-switch into chip on cartridge as protection against regeneration. You may refill your cart, but if kill-switch went on already, your printer will not print anyway claiming dry cartrigde.

I've actually experienced this on HP printer, and quick Google search shows that I'm not alone in this: http://www.gadgetspage.com/comps-peripheral/hp-printer-consp...

[kuschku]

Well, my printer allows me to ignore that switch if I keep the "abort print" and the "print test page" button both pressed for at least 15 sec after inserting the cartridge.