“…These advances implied the use of different elemental analytical techniques to characterize the materials and determine the provenance of the archaeological ferruginous colouring matters: X-Ray Fluorescence spectrometry (XRF) Lebon et al, 2019) , particle-induced X-ray emission (PIXE) (Erlandsen et al 1999;Bernatchez et al 2008 ;Nel et al, 2010 ;Beck et al, 2011Beck et al, . 2012Salomon et al, 2012 ;Mathis et al, 2014 ;Lebon et al, 2014) , instrumental neutron activation analysis (NAA) (Kiehn et al, 2007 ;Popelka-Filcoff et al, 2007, 2008Eiselt et al, 2011 ;MacDonald et al, 2013MacDonald et al, , 2018Velliky et al, 2021) , inductive coupled plasmaoptical emission spectrometry and mass spectrometry (ICP-OES and ICP-MS) coupled or not to laser ablation (Green an Watling, 2007 ;Iriarte et al, 2009 ;Dayet et al, 2013 ;Scadding et al, 2015 ;Moyo et al, 2016 ;Zipkin et al, 2017Zipkin et al, , 2020Eiselt et al, 2019 ;Pierce et al, 2020 ;Mauran et al, 2021a) . An extensive review of these studies has been recently published by Dayet (2021).…”