Aggressive depigmentation
Aggressive depigmentation is the loss of colour that occurs in the sentio metallico of a Cybertronian after the Spark leaves a body, leaving the body various shades of grey.
Fiction
IDW Generation 1 continuity

Aggressive depigmentation set in almost instantly after a Spark expired. Rage, Rage
After the initial Expansion, Nemesis Prime's body turned grey upon his essence returning to the Dead Universe. Black Planet
On death's door from a personality tick infestation, Thunderclash's body succumbed to aggressive depigmentation and rigor morphis until the ticks were defeated, restoring his health and palette. The Frail Gaze Skids's body lost its colours upon his demise. Rage, Rage After being exposed to the energies of the Talisman, Centurion succumbed to depigmentation. Ghost in the Machine
While travelling back to the Lost Light, Ratchet inexplicably succumbed to aggressive depigmentation despite being alive. Sardines
Trivia
- Aggressive depigmentation is, of course, a fancy name for the long tradition of Transformers turning grey upon death.

