A medium black tattoo on the forearm reached 75% fading after 15 sessions at Removery over 3 years.

Before (session 0) and after (session 15) at Removery.
The tattoo
A medium black tattoo on the forearm on Type II skin (fair, tans sometimes but often burns), 4 years old when treatment began.
Fitzpatrick Type II is favorable: tolerates standard energy settings with minimal pigmentation risk.
The forearm drains adequately but sits further from the major lymph nodes of the torso.
Timeline
15 sessions at 10-12 weeks intervals accounts for roughly 154 weeks of active treatment.
The laser
Removery treated this case with the Picoway, a picosecond platform.
For black ink, it operates at 1064 nm with a pulse duration of 240 - 450 ps.
Mike from GO describes PicoWay as a monster on black ink, and it is his personal choice for black ink removal.
Bottom line
The last 5 to 10 percent of clearance is consistently the hardest phase: residual ink sits deepest, immune response slows, and the composition of what remains is unknown.
Similar cases in the gallery: Large Multicolor Upper Arm Tattoo: 50% Fading After 5 Sessions at Removery — Black and Blue Upper Arm Tattoo: 75% Fading After 4 PicoWay Sessions at Removery