How much time the colour performs is individual to each person. The colour will soften overtime with the natural skin growth process, actual retention depends on many different factors, including your medical background and health, as well as your general lifestyle; age, skin type, diet, metabolism, original skin colour, exposure to sunlight, use of skin treatments, sun beds etc.
Generally treatments last from upwards of one year to five plus, but to keep the colour looking fresh it is recommended that every 12 to 18 months a retouch is taken. Very natural looking treatments are likely to require a touch-up before a more dramatic one. It is important to remember Permanent Makeup is not a ‘no maintenance’ treatment, but a ‘low maintenance’ treatment.