Please Read Me. Allowing a cartridge
to run dry before recycling it may damage the cartridge. You
see, the ink is expelled from the print head at high temperature.
As fresh ink rushes in to take the place of that which was expelled,
it cools the print head. If the cartridge runs empty, the heat
still forms, but no fresh ink rushes in to cool it. Very quickly
the print head dies due to heat.
Most HP, Lexmark, and a few of the older Canon cartridges have
the print head built into the cartridge. Most Canon and Epson
cartridges are simply ink tanks and the print head is built into
the printer. Inkjet ink is designed to dry very quickly so that
it doesn't smear on the paper. This is the reason you must never
remove a cartridge (ink tank) from an Epson or Canon printer
for more than a few minutes. When you remove the tank, it
exposes a part of the printer which holds ink - ink which will
dry very quickly and cause a blockage. The blockage will prevent
ink from reaching the print head - and your attempts at printing
will result in a blank page. I don't just mean when refilling,
I mean even when replacing a cartridge with a new one.
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Hewlett Packard
Canon
Lexmark
Epson
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