Fig. 9

Laser cleaning tests at 1064 nm at a fluence of 0.5 J/cm.² of feathers covered with a thin layer of carbon black, from top to bottom: white, yellow and pink feathers. Optical microscope images (a, b, c—bars = 500 µm), and their corresponding SEM images (a’, b’, c’). © The Trustees of the British Museum. Shared under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) licence.