There are various laser and non-laser reomval techniques. Some are proven effective. while others may even cause scarring.Laser tattoo removal requires specialized equipment- a q-switched laser. There are 3 kinds- ruby, alexandritr, and nd-yag. The ruby can possibly damage darker skin. The alexandrite treats black and dark green well. the nd-yag especially the medlite c6 treats all skin colors but may have trouble treating some dark green colors. The internet products are unproven and can cause scaring. they are variations on acid solutions.