Hi Clee,
The base of a grey hair follicle is usually black at the root. The change to grey takes some time and as ATP itself fades over time we can adjust the amount of pigmentation applied. ATP lasts for around 4-7 years depending on skin type and itself is fading over time. When hair greys in the future and becomes more translucent an experienced technician would adjust the amount and coverage pattern to a very light effect to help blend in any future ATP top up with increased Grey hair.
The combination of knowledge and experience in how much pigment and shade to apply and what density and distribution is crucial to get the best result. Any concerns regarding future greying are best talked at the consultation stage with the clinic and if you are experiencing a fast change to grey hair, then a conservative ATP approach is more desirable to ensure the finished effect is natural and undetectable.
Overall advice is to start with a light ATP session as that helps assess how the skin reacts to pigment and also how the hair and ATP blend together before the session to finish the process.
Regards
Spex
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