Active infrared thermography applied to the study of a painting on paper representing the<i>Chigi's family tree</i>

Pucci, Marina; Cicero, Cristina; Orazi, Noemi; Mercuri, F.; Zammit, U.; Paoloni, S.; Marinelli, M.

doi:10.1179/2047058413y.0000000117

Cited by 28 publications

(9 citation statements)

References 12 publications

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“…Concerning paper-based artefacts, as an example, in the study of the Chigi Family tree paper painting (Figure 6(a)) IRT was used to analyze both the adhesion between the paper and the support (Figure 6(b)) and also the marks left by the chain-lines of the sieve used in the paper production ( Figure 6(c)). In particular, the brighter areas in Figure 6(b) correspond to detachments between the paper and the support, while the horizontal dark band in the middle of the page corresponds to the joints of the two adjacent paper sheets constituting the overall substrate (Pucci et al 2015). In this research, the use of IRT enabled the study of the effects of deterioration phenomena, such as delamination, losses, and deformations of the paper leaf.…”

Section: Defects and Structural Elements Of Writing Supportsmentioning

confidence: 92%

“…(a) Photograph of the Chigi Family tree paper painting; and (b) corresponding thermogram where the brighter areas correspond to detachments between the paper and the support, the red arrow indicates the joint the two adjacent paper sheets constituting the overall substrate; (c) thermographic detail where the black arrows indicate the marks left by the chainlines of the tray used for making the paper (reproduced from ref Pucci et al 2015)…”

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confidence: 99%

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Mid-wave Infrared Reflectography and Thermography for the Study of Ancient Books: A Review

Orazi

2020

Studies in Conservation

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In this paper an overview of recent applications of mid-wave infrared imaging techniques to the study of books is presented. Studies performed by thermography and mid-wave infrared reflectography are reviewed to demonstrate how they can be used to investigate the main features of books. The capability of these techniques is exploited in the analysis of structural elements of the bookbindings and writing supports as well as in the characterization of the writings and illuminations. Thermographic and reflectographic results are compared with results obtained using other imaging techniques operating in different spectral regions, thus pointing out how mid-wave infrared imaging techniques can help in examining many aspects of books. Finally, it is shown that the obtained information can also be used to evaluate the condition of the book and, when required, to properly plan conservation treatments.

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Section: Defects and Structural Elements Of Writing Supportsmentioning

confidence: 92%

mentioning

confidence: 99%

Mid-wave Infrared Reflectography and Thermography for the Study of Ancient Books: A Review

Orazi

2020

Studies in Conservation

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“…Unlike optically opaque samples, in optically semi-transparent ones, such as the ones investigated in the present study, both the VIS light absorption and the IR emission do not exclusively occur at the sample surface but take place also over the sample volume. Therefore, besides the thermal inhomogeneities mentioned before, the thermogram contrast may also originate from subsurface features [48] characterized by different VIS absorption or IR emission properties with respect to those of the surrounding areas. As shown later on, such a circumstance provides a valuable tool for the detection of buried graphical elements such as underdrawings [49].…”

Section: Pulsed Thermography and Mwir Reflectographymentioning

confidence: 99%

Remote and contactless infrared imaging techniques for stratigraphical investigations in paintings on canvas

et al. 2021

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In the analysis of complex stratigraphical structures like painted artefact, infrared (IR) techniques can provide precious information about elements hidden under superficial layers of the artwork, such as pictorial features and structural defects. This paper presents a novel complementary use of reflectographic and thermographic techniques for the survey of three baroque paintings, preserved at the Chigi Palace in Ariccia (Italy). First, the IR-ITR laser scanner prototype has been used for the preliminary and remote near-IR reflectographic survey of the areas where the canvas was located. The resulting map was then used for planning the thermographic and mid-IR reflectographic studies, focusing the analyses on the most interesting areas of one of the paintings, called “La Primavera”. The combination of the three imaging techniques revealed several details not visible by the naked eye, such as restored lacunas and pentimenti, demonstrating the validity and complementarity of the proposed combined methodologies.

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“…For non-expert users, there is a high chance to provoke the thermochromism effect on the painting surface, as well as the deposition of too-high thermal stresses, especially using the pulsed thermography scheme [30]. This risk must be avoided or at least highly mitigated because, as an imaging method, IRT allows the conservation analysis [31], the first judgment of constitutive materials and painting technique (whether present) [32], as well as the comparison with additional imaging data [33]. Hence, the challenge is to reduce the power of the heating system without losing the penetration depth and the inspection capability with respect to employing high-powered flash lamps.…”

Section: Pulse-compression Thermographymentioning

confidence: 99%

Looking Through Paintings by Combining Hyper-Spectral Imaging and Pulse-Compression Thermography

Laureti

Malekmohammadi

Rizwan

et al. 2019

Sensors

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The use of different spectral bands in the inspection of artworks is highly recommended to identify the maximum number of defects/anomalies (i.e., the targets), whose presence ought to be known before any possible restoration action. Although an artwork cannot be considered as a composite material in which the zero-defect theory is usually followed by scientists, it is possible to state that the preservation of a multi-layered structure fabricated by the artist’s hands is based on a methodological analysis, where the use of non-destructive testing methods is highly desirable. In this paper, the infrared thermography and hyperspectral imaging methods were applied to identify both fabricated and non-fabricated targets in a canvas painting mocking up the famous character “Venus” by Botticelli. The pulse-compression thermography technique was used to retrieve info about the inner structure of the sample and low power light-emitting diode (LED) chips, whose emission was modulated via a pseudo-noise sequence, were exploited as the heat source for minimizing the heat radiated on the sample surface. Hyper-spectral imaging was employed to detect surface and subsurface features such as pentimenti and facial contours. The results demonstrate how the application of statistical algorithms (i.e., principal component and independent component analyses) maximized the number of targets retrieved during the post-acquisition steps for both the employed techniques. Finally, the best results obtained by both techniques and post-processing methods were fused together, resulting in a clear targets map, in which both the surface, subsurface and deeper information are all shown at a glance.

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Active infrared thermography applied to the study of a painting on paper representing theChigi's family tree

Cited by 28 publications

References 12 publications

Mid-wave Infrared Reflectography and Thermography for the Study of Ancient Books: A Review

Mid-wave Infrared Reflectography and Thermography for the Study of Ancient Books: A Review

Remote and contactless infrared imaging techniques for stratigraphical investigations in paintings on canvas

Looking Through Paintings by Combining Hyper-Spectral Imaging and Pulse-Compression Thermography

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