Neopost IJ-50 User Manual page 60

Carefully withdraw the used Ink Cartridge and discard.
Remove the new Ink Cartridge from its packaging and carefully
remove the tape seals.
Do NOT touch or remove the copper strip on Ink Cartridges.
Place the new Ink Cartridge into its holder. Hold the Cartridge down
with light pressure on the top and firmly push the Cartridge rearwards
(see arrow) until it clicks into position.
Close the machine top cover and press .
Maintaining print quality 59