Thank you for your insightful questions. I will answer them as best I can below:
1. The pigmentation ‘dots’ are very small and for a person with hair that is not black (light brown for example) the pigment color can mimic the hair around the fringe, almost a dark gray which will not be a problem with age. We generally make the color match the hair color (shade). Remember that as the hair grows out from the scalp, it is exposed to sunlight (normally) and the hair in almost all people who do not have black hair will see some hair lightening, so we address that up-front as we select the initial color we use.
2. Over time, the pigment may fade and might need a touch-up. Our base charge will cover someone for 3 months to deal with color absorption of the pigment. Everyone is different with regard to the amount of pigment that is absorbed after the initial treatment. For a second treatment and beyond, pigmentation absorption is much slower, but it might fade more after a few years. Touch-ups may be desired.
3. Fees are individually determined at the time of the consultation, but they range from $2000 - $6000 depending upon the amount of work. This will include as many touch-up sessions as is needed to achieve the initial goals. It may take two or more sessions.
We will soon be trying a new pigment that is supposed to be reversible with one laser treatment, so even though we do not recommend that people consider this a reversible process, it possibly is. We plan to make it available after we determine how beneficial this pigment actually is.