1. Haute Ecole Arc Conservation-Restauration, HES-SO, Espace de l’Europe 11, 2000 Neuchatel, Switzerland
2. Laboratory of Technologies for Heritage Materials, Institute of Chemistry, University of Neuchâtel, Av. Bellevaux 51, 2000 Neuchatel, Switzerland
3. Department of Chemistry, University of Bologna, Ravenna Campus, via Guaccimanni, 48120 Ravenna, Italy
4. Arc’Antique conservation and research laboratory, 26 Rue de la Haute Forêt, 44300 Nantes, France