Novel integration of non-invasive imaging techniques for the analysis of an egg tempera painting by Pietro Lorenzetti
Consiglio Nazionale delle Ricerche - Istituto Nazionale di Ottica (CNR-INO), Largo Enrico Fermi 6, 50125, Florence, Italy
2 Istituto Nazionale di Fisica Nucleare (INFN), Via Bruno Rossi, 1, 50019, Sesto Fiorentino, Italy
3 Dipartimento di fisica e astronomia, Università degli Studi di Firenze, Via Sansone, 1, 50019, Sesto Fiorentino, Italy
4 Opificio delle Pietre Dure, Via degli Alfani, 78, 50122, Florence, Italy
Accepted: 28 December 2022
Published online: 23 January 2023
The identification of an artist's palette through the application of non-invasive techniques is a challenging goal due to the huge variety of artistic materials that constitutes a painting. An effective approach is to combine several techniques providing complementary information in order to minimise the risk of misinterpreting the data. In this paper, we propose a multi-analytical method comprising three non-invasive mapping techniques, namely Reflectance Imaging Spectroscopy (RIS), Macro-X-Ray Fluorescence (MA-XRF) and Fluorescence Lifetime Imaging (FLI), for the study of a fourteenth-century painting by Pietro Lorenzetti from the Uffizi Gallery collection. For the low-cost and time-saving interpretation and integration of the data provided by the different techniques, a purposely developed software for multivariate statistical analysis was used. FLI data were acquired with a prototype applied for the first time on a work of art, and the data were processed with a method based on phasor analysis. The information obtained was discussed within a multidisciplinary team of experts on painting materials and data processing belonging to both the scientific and the conservation community.
© The Author(s) 2023. corrected publication 2023
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.