HOW LONG DOES THE RESULT LAST?For brows, up to 18 months. Hair color, skin type, after-care, and lifestyle also affect longevity of the results. Occasional touch-ups are a way to refresh the results. Done correctly, the treatments do not change color and fade naturally away with time. For areas such as brows, this allows future flexibility with shape, as standards of beauty change. Please note even if not visible to the eye, there will always be vestigial pigment permanently embedded in the skin.