A half sleeve black tattoo on the skin reached 25% fading after 5 sessions over 2 months.

Before (session 0) and after (session 5) at treatment.
The tattoo
A half sleeve black tattoo on the skin.
Timeline
5 sessions over years, 2 months.
Sessions were spaced 6 weeks apart.
The laser
The PicoSure is a picosecond platform.
For black ink, it operates at 1064 nm with a pulse duration of 550 - 750 ps.
PicoSure's black ink adapter (1064nm) is considered largely ineffective by most experienced providers; the native 755nm is its strength.