A tattoo black tattoo on the finger reached 25% fading after 2 sessions at SW Laser over 10 years.

Before (session 0) and after (session 2) at SW Laser.
The tattoo
A medium black tattoo on the finger, 5–10 yrs old when treatment began.
Fingers are notoriously stubborn due to poor circulation and minimal lymphatic drainage.
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 10 years.
Bottom line
Tattoos on the finger clear more slowly than torso work due to restricted circulation. Realistic timelines here run longer than average.