You sift the powder through a handkerchief until you have a fine dust. You mix the dust with urine. It is best to use the urine of the person getting the tattoo. And you get a kind of ink. I only use soot.
Soot turns out darker.
It doesn't fade over time. Everything comes out bright. When they tattooed churches, each cupola stood for a conviction. For example, two cupolas meant two convictions and so on. The cupolas mean how long I've been in and everything else.