Monitoring UV-accelerated alteration processes of paintings by means of hyperspectral micro-FTIR imaging and chemometrics

González-Cabrera, M.; Domínguez‐Vidal, Ana; Ayora‐Cañada, María José

doi:10.1016/j.saa.2021.119568

Cited by 8 publications

(11 citation statements)

References 44 publications

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“…This finding might also be confirmed from the relative concentration between organic/inorganic fractions in FTIR spectra, where calcite absorption showed relatively higher intensity. An erosive phenomenon of the binder was reported in the literature as a chalking effect, linking it to the presence and loss of titanium oxide [11,75], but also to a photolytic degradation of the binder itself [76,77]. In this study, only the golden paint has TiO 2 as filler, whereas the quartz paint is based on silicate and carbonate only.…”

Section: Discussionmentioning

confidence: 74%

Assessing the (In)Stability of Urban Art Paints: From Real Case Studies to Laboratory Investigations of Degradation Processes and Preservation Possibilities

Cimino

Lamuraglia

Saccani³

et al. 2022

Heritage

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Urban art as a shared expression of street art between artists, citizenship and municipalities has always had an important role in the social life and appearance of modern cities. However, the durability of urban and street artworks is susceptible to the degradation processes that the employed commercial paint formulations undergo once outdoors. These are complex mixtures of compounds, differently sensitive to environmental agents according to their chemical nature. Starting from the colorimetric analysis of murals created in 2010, 2011 and 2018 in Reggio Emilia, Italy, documenting their degradation already after a few months, this study aimed at understanding the stability of the most unstable paints used by the artists in these artworks. A multi-analytical approach evaluated the commercial products under the chemical point of view, after natural and accelerated ageing. Additionally, two manufactured anti-UV varnishes were evaluated for their possible use as coatings. The results pinpointed the weaknesses of the selected paints and highlighted how the application of an anti-UV coating might slightly affect the visual aspect of the artwork, though ensuring a greater resistance to the outdoor conditions due to their minor chemical sensitivity to environmental agents.

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Section: Discussionmentioning

confidence: 74%

Assessing the (In)Stability of Urban Art Paints: From Real Case Studies to Laboratory Investigations of Degradation Processes and Preservation Possibilities

Cimino

Lamuraglia

Saccani³

et al. 2022

Heritage

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“…Other publications deal with the evolution/degradation of the egg‐tempera paint medium. Indeed, infrared hyperspectral microimages were used to investigate the alteration of organic binders in paint layers after artificial UV light ageing on painted mock‐ups [6] . Degradation via saponification has also been observed in paint layers consisting of lead‐tin yellow type I and egg yolk binder in a panel painting from the 15th century [7] .…”

Section: Figurementioning

confidence: 99%

Connecting Rheological Properties and Molecular Dynamics of Egg‐Tempera Paints based on Egg Yolk

et al. 2021

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Egg‐tempera painting is a pictorial technique widely used in the Middle Ages, although poorly studied in its physico‐chemical aspects until now. Here we show how NMR relaxometry and rheology can be combined to probe egg‐tempera paints and shed new light on their structure and behavior. Based on recipes of the 15th century, model formulations with egg yolk and green earth have been reproduced to characterize the physicochemical properties of this paint at the mesoscopic and macroscopic scales. The rheological measurements highlight a synergetic effect between green earth and egg yolk, induced by the interactions between them and the structural organisation of the system. 1H NMR relaxometry emphasizes the presence and the structure of a network formed by the yolk and the pigment.

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“…Other publications deal with the evolution/degradation of the eggtempera paint medium. Indeed, infrared hyperspectral microimages were used to investigate the alteration of organic binders in paint layers after artificial UV light ageing on painted mock-ups [6] . Degradation via saponification has also been observed in paint layers consisting of lead-tin yellow type I and egg yolk binder in a panel painting from the 15th century [7] .The swelling of egg-paint films subjected to cleaning (by water or an organic solvent) [8] was monitored by NMR relaxometry [9] .…”

Section: Connecting Rheological Properties and Molecular Dynamics Of ...mentioning

confidence: 99%

Connecting Rheological Properties and Molecular Dynamics of Egg‐Tempera Paints based on Egg Yolk

et al. 2021

View full text Add to dashboard Cite

show abstract

Monitoring UV-accelerated alteration processes of paintings by means of hyperspectral micro-FTIR imaging and chemometrics

Cited by 8 publications

References 44 publications

Assessing the (In)Stability of Urban Art Paints: From Real Case Studies to Laboratory Investigations of Degradation Processes and Preservation Possibilities

Assessing the (In)Stability of Urban Art Paints: From Real Case Studies to Laboratory Investigations of Degradation Processes and Preservation Possibilities

Connecting Rheological Properties and Molecular Dynamics of Egg‐Tempera Paints based on Egg Yolk

Connecting Rheological Properties and Molecular Dynamics of Egg‐Tempera Paints based on Egg Yolk

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