Changing the Ink Cartridge:
Your Ink cartridge has up to 15,000 impression, depending
on the stamping size. You can swap out different ink colors. However,
the rubber should first be cleaned to remove most of the ink left the
printing die. This is done by first removing the cartridge. Then
repeatedly stamping on scrap paper (without ink) to remove the bulk of ink and
then onto a wet paper towel to remove the rest. This way the color
doesn’t contaminate the new cartridge.