Fig. 4From: Investigating the potential of the Nd:YAG and Er:YAG lasers for the cleaning of feathers: a pilot studyOptical microscope image showing the very slight discoloration/bleaching of the dark barbules of a green parrot feather after laser irradiation at 532 nm. © The Trustees of the British Museum. Shared under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) licence.Back to article page