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In-situ technical study of modern paintings - Part 2: Imaging and spectroscopic analysis of zinc white in paintings from 1889 to 1940 by Alessandro Milesi (1856–1945)

Journal article
Authors L. Giorgi
Austin Nevin
D. Comelli
T. Frizzi
R. Alberti
E. Zendri
M. Piccolo
F. C. Izzo
Published in Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume 219
Pages 504-508
ISSN 13861425
Publication year 2019
Published at Department of Conservation
Pages 504-508
Language en
Links https://doi.org/10.1016/j.saa.2019....
Keywords Alessandro Milesi, In-situ analysis, LIF (Laser Induced Fluorescence), Non-invasive spectroscopic techniques, Time-Resolved Luminescence Imaging, Zinc oxide
Subject categories Architectural conservation and restoration, Image analysis, Analytical Chemistry, Spectroscopy

Abstract

© 2019 Elsevier B.V. We present a multi-analytical in situ non-invasive study of a series of emblematic paintings by Alessandro Milesi (1856–1945)from the collection of the International Gallery of Modern Art Ca' Pesaro in Venice. Eight paintings dated from 1897 to 1910 were studied with imaging and spectroscopic techniques. White pigments were characterized by a combination of X-ray fluorescence spectroscopy which traced the presence of zinc-based pigments in Milesi's paintings, Raman Spectroscopy, Laser Induced Fluorescence (LIF)Spectroscopy and Time-resolved Luminescence Imaging. Time-resolved analysis of luminescence emissions revealed the nanosecond emission from organic compounds and the slower emission from the luminescent inorganic pigment Zinc Oxide that varied between 1.1 and 1.6 microseconds. In this work, data regarding the distribution of luminescent pigments was acquired with a time-gated imaging detector. Furthermore, differences in emission decay kinetics recorded from different paintings can be ascribed to different paint formulations or origins of the Zinc white in paint.

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