Originally posted by Becca. They had different kinds and just told the chef to pick it out for us. He's amazing, I wish I knew his name. Put yourself in the artwork! Because of the semi-permanent nature of henna, they lack the realistic colors typical of decal temporary tattoos. Its presence there is stable, but in the long term decades the pigment tends to migrate deeper into the dermis, accounting for the degraded detail of old tattoos. Research has linked these and other ingredients to a range of health problems including allergic reactions, chronic inflammatory reactions, and late-onset allergic reactions to related clothing and hairdressing dyes.