To guarantee the maximum life of the stamp ink cartridge it is important to keep it stored in the airtight bag that comes with the stamp. Before using the stamp for the first time, open the cartridge lid and insert it into your stamp through the opening in the back. Place the cartridge inside the stamp with the ink-side down and push in until it clicks into place.
Before the first use, insure that the stamp is well inked by only pressing the stamp half-way down. Once the Stamp is inked, place the Stamp on a smooth, flat surface and push the stamp all the way down. After using the stamp remember to remove the cartridge, put on its lid and store it along with the stamping the airtight bag.