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Video from Bogdan (EN subtitles)
Bogdan describes titanium dioxide in PMU pigments:
Regarding the metabolism of carbon black and titanium dioxide
There are some peculiarities.
Titanium dioxide particles cannot be dissolved by anything or anyone. Even if a titanium dioxide particle is placed inside a cell, it will not dissolve and will just hang out in that cell. Titanium dioxide is not degraded by bodily fluids.
Therefore, macrophages can’t handle it. It's like trying to eat a brick.
Transferrin isn’t interested in this component either, as titanium dioxide is not a biogenic material.
And white pigment can't be removed with a laser either.
So, this component is with you for life.
And anyone who says their inks contain a special type of titanium dioxide that eventually metabolizes is lying.
As for carbon black, it has its quirks:
In its pure form, carbon is little attractive to the body. To become biogenic and of interest to transferrin, carbon needs to undergo oxidation reactions, which can’t be carried out in the body. Therefore, transferrin will not excrete this pigment.
But with macrophages, it’s a similar story as with organic pigments.
In areas of constant fluid replacement (typically on the face), soot particles will be destroyed and eaten by macrophages. Thus, permanent makeup on eyebrows gradually and evenly lightens (assuming the brown mix is properly made and the work is done at the right depth).
On other parts of the body, black tattoos will look quite black, and soot particles will remain in place.
And with a laser, this stuff is very easily destroyed.
