A Permanent Tattoo – is an ordinary tattoo. Erase image is impossible. There is no such thing as a temporary tattoo. There are tattooing colors that are used for cosmetic tattoo (permanent makeup).
Enough for about 3-5 years. It all depends on skin type, general health, lifestyle, etc. There is also a biotating. It is applied using different shades of henna: from pale pink to dark brown. This all eats into the upper layer of the skin and lasts for about a week or two