HP Color LaserJet 9500 Multifunction Printer series - Manual (Page 211)

ENWW Managing supplies 195
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7 Repeat steps 2 through 6 for each cartridge that needs to be replaced, and
then close the front doors.
8 Make sure that READY appears on the control-panel display, and the gauge
for the replaced cartridge indicates that the cartridge is new.
9 Pack and seal the used cartridge in the packaging from the new cartridge.
For recycling information, see the recycling guide that is included with the
new cartridge.
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