The way our immune cells protect us holds the secret to permanent
ink. Macrophages—specialized immune cells—gobble up invaders, like bacteria and
viruses, and destroy them using acid. When tattoo ink is placed between your
skin cells, it’s also treated like a foreign invader. There’s a problem,
though. Tattoo ink cannot be destroyed by acid. So macrophages do the next best
thing: contain it until they die. Once they do, another macrophage immediately swallows
the ink again. This indefinite process leaves you with body art that lasts a
Want to make a lasting mark with incredible visual expression? We have the audacity to bring health, science, and wellness brands to life by pushing the creativity—in CMYK or RGB.