When your Round Style Stamp runs out of ink, here’s how to replace the ink cartridge. Compress the stamp just enough to relieve the ink pad from the rubber stamping surface. Press in both red lock buttons on the sides of the stamp to hold the stamp in place. Push the ink cartridge out using your finger or an object such as a pen. Holding the ink cartridge by the sides, pull the ink cartridge out. Remove the cap from the new ink cartridge. Hold the new ink cartridge with the ink facing up. Slide