Good work but the difference is very subtle, he could get away with not having the procedure done.
Hi Lucky, thanks for your comment. We are happy you find the change subtle as that is what any restoration should be, in relation to how natural the change is, and ironically not drawing attention to the change. That said, the change is far from subtle for the individual, he now has a hair line that frames his face. Here are comparison images.
It is subtle because a very light color pigment was used, the difference would have been more dramatic if a darker ink was used instead.
They have to match his existing hair so using a darker ink would not be an option at all otherwise he would end up having a 2-tone scalp !!