Newly refilled Kodak ink cartridges need to have their chips replaced with new chips so that the printer can "recognize" them as full again. Aftermarket chips are slightly different in shape to the original chips in order to better protect them from damage (replacement chips are slightly thicker), and therefore it is required to modify the chip slot on the cartridge to adequately hold the replacement chip in place.
You will notice that the OEM (original) chip is held in place by a small plastic protrusion that is holding the chip in place from the bottom of the chip (see just below the chip, in the middle of the chip). This plastic protrusion can be depressed easily with a screwdriver or pen tip, releasing the hold on the chip. The chip will then easily slide downwards, and out.
The replacement chip is thicker than the original chip, so the same plastic protrusion needs to be depressed even more in order to get the replacement chip to slide in place. The protrusion may need to be physically bent a little to create the extra space needed to slide the chip into place.