Elucidating the composition and the state of conservation of nitrocellulose-based animation cells by means of non-invasive and micro-destructive techniques Francesca Caterina Izzo, Alessandra Carrieri, Giovanni Bartolozzi, Henk van Keulen, Irene Lorenzon, Eleonora Balliana, Costanza Cucci, Francesco Grazzi, Marcello Picollo • 2019