Well, for what I see it seems it's not fake.  If 
you pay attention, the darkest part of the ink in 
the thumb is part of the upper side of the hand, 
and the rest of the hand is part of the other 
side of the hand, and that part is always lighter 
than the other side (did I make myself clear? I 
don't know very well how to express the idea ^-^ 
gomen).

That's my humble opinion

Bulma