Development of a multi-analytical approach to investigate the fading of eosin in painting matrices

Florence Heri-Tech - The Future of Heritage Science and Technologies

Sabatini, F.^1 ; Giugliano, R.^1 ; Degano, I.^1 ; Lluveras-Tenorio, A.^1 ; Sokolová, R.^2 ; Thoury, M.^3 ; Colombini, M.P.^1

Dipartimento di Chimica e Chimica Industriale, Universita di Pisa, Via Giuseppe Moruzzi 3, Pisa

I-56124, Italy^1

J. Heyrovský Institute of Physical Chemistry, Czech Academy of Sciences, Dolejskova 3, Prague

18223, Czech Republic^2

IPANEMA, CNRS, Ministere de la Culture, UVSQ, USR3461, Université Paris-Saclay, Gif-sur-Yvette

F-91192, France^3

关键词: Aluminum salts;    Analytical approach;    Canvas paintings;    Degradation process;    Organic dye;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/364/1/012066/pdf
DOI  :  10.1088/1757-899X/364/1/012066

来源: IOP

【 摘 要 】

Eosin is a xanthenic synthetic organic dye/pigment synthesized by Caro in 1873. It was precipitated with lead and aluminum salts and commercialized as geranium lake and it was one of the most brilliant hues in the palette of the Impressionist painter Vincent van Gogh. Unfortunately, the high photosensitivity of eosin has caused the evident fading of the intense pink colorations of his canvas paintings into lighter ones. This work aims at underlying the contribution of several complementary different analytical techniques in disclosing a very complex and still little-known topic such as the degradation process of eosin.