On the Hierarchical Use of Colourants in a 15th Century Book of Hours.Published in:Heritage (2571-9408), 2021, v. 4, n. 3, p. 1786, doi. 10.3390/heritage4030100By:Agostino, Angelo;Pellizzi, Eleonora;Aceto, Maurizio;Castronovo, Simonetta;Saroni, Giovanna;Gulmini, MonicaPublication type:Article