A tattoo black tattoo on the skin reached 25% fading after 2 sessions at LaserYou over 12 years.

Before (session 0) and after (session 2) at LaserYou.
The tattoo
A medium black tattoo on the skin, more than 10 years old when treatment began.
Older ink benefits from years of natural immune-driven fading: macrophages have been working on the particles throughout the tattoo's life, reducing effective density before treatment begins.
Timeline
2 sessions over 12 years.
Sessions were spaced 2 months apart.
The laser
LaserYou treated this case with the PicoSure, 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.