Reiter, K., Wiljes, S., Engel, F. and Ebinal, I.. "Lumen & Colours: A journey into the world of science" Practical Metallography, vol. 59, no. 11, 2022, pp. 684-696. https://doi.org/10.1515/pm-2022-0066 © 2022 Walter de Gruyter GmbH, Berlin/Boston, Germany