Abstract
Very few real easel paintings have been scanned by means of terahertz time-domain imaging (THz-TDI) up to now. In this study, four different areas of an eighteenth century easel painting have been scanned by THz-TDI with the aim of proving useful information to the conservators for its imminent restoration treatment, owing to the complexity of its structure. Despite the unevenness of the layers composing the painting (lining canvas, original canvas, patching materials, and paint layers), the recorded THz dataset has been processed so that the THz images of the single layers composing the multilayered object have been clearly obtained. Relevant information about the painting structure, the presence of structural defects, overpainting, and the existence and extension of the original remains could have been determined. Infrared photography and X-ray radiography have been used for integrating the collected THz data and comparing the different outputs.
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Funding
This study received financial support from the Consejo Nacional de Ciencia y Tecnología CONACYT (grant numbers 255114, 252939, and 280391). Corinna L. Koch Dandolo received financial support from the Swiss National Science Foundation (grant SNSF, P2SKP2_16321 / 1).
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Koch Dandolo, C.L., Pasco Saldaña, G.M., Insaurralde Caballero, M.A. et al. Terahertz Time-Domain Imaging to Guide a Conservation Intervention on a Stratified Easel Painting. J Infrared Milli Terahz Waves 39, 773–784 (2018). https://doi.org/10.1007/s10762-018-0505-3
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DOI: https://doi.org/10.1007/s10762-018-0505-3