The process involves flower pollen and starts by having the cartridge dipped in aluminum oxide soluble solution. Once this solution hardness the formed ridges will nab cells of the persons skin and thus make it easier for authorities to identify the person who loads the gun.
The pollen comes to increase the chances of a positive unique match. Polen grains from the plant Easter lilly are coated in dioxide titanium which is then used as coating for the bottom of the bullet casing.
Researchers say this will help mark the hands of the gun owner by forming an unique tag.