Tattoos? No problem, go right ahead...
Magic crystal has no effect on tattoos or on their appearance.
Magic Crystal will only remove hair down to the surface of the skin and will exfoliate the very top of the stratum corneum, the outer protective layer of the skin’s epidermis.
In contrast, tattoo ink is injected deep beneath the whole of the epidermis into a layer called the dermis.
Only treatments that are able to penetrate deep among the skin’s blood vessels and nerves are able to have any effect on the ink particles that make up tattoos.