Single-sided NMR: a non-invasive diagnostic tool for monitoring swelling effects in paint films subjected to solvent cleaning

Moretti, Patrizia; Cartechini, Laura; Miliani, Costanza

doi:10.1007/s00216-019-02331-x

Cited by 11 publications

(4 citation statements)

References 17 publications

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“…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] . Other authors reported on the characterization of the paint surface (colour, reflectance, rugosity) depending on the tempera paint composition (nature of the pigment and binder, egg yolk or rabbit glue, and their proportions), using interferometric profilometry and hyperspectral imaging techniques [10] , and also Laser Induced Fluorescence [11] .…”

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

confidence: 98%

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

confidence: 98%

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

et al. 2021

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“…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: Figurementioning

confidence: 98%

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

et al. 2021

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“…By 1 H NMR depth profiles, the thickness of the painted layers and its variability on the whole area of the painting can be evaluated during the cleaning treatment [15]. It is equally possible to study the diffusivity of solvents and water-based cleaning system, and the thickness of residual layers which were poorly solubilized by the cleaning formulation [3].…”

Section: Unilateral Nmr To Evaluate Water-based Cleaning Systems Applmentioning

confidence: 99%

New Insights to Characterize Paint Varnishes and to Study Water in Paintings by Nuclear Magnetic Resonance Spectroscopy (NMR)

Tullio

Proietti

2020

Magnetochemistry

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Paintings are complex multi-layered systems made of organic and inorganic materials. Several factors can affect the degradation of paintings, such as environmental conditions, past restoration works and, finally, the type of painting technique and the art materials used over the centuries. The chemical–physical characterization of paintings is a constant challenge that requires research into and the development of novel analytical methodologies and processes. In recent years, solvents and water-related issues in paintings are attracting more attention, and several studies have been focused on analyzing the interaction between water molecules and the constitutive materials. In this study, recent applications applying different NMR methodologies were shown, highlighting the weakness and the strength of the techniques in analyzing paintings. In particular, the study of water and its diffusive interactions within wall and oil paintings was performed to prove how the portable NMR can be used directly in museums for planning restoration work and to monitor the degradation processes. Furthermore, some preliminary results on the analysis of varnishes and binders, such us linseed oil, shellac, sandarac and colophony resins, were obtained by 1H HR-MAS NMR spectroscopy, highlighting the weakness and strengths of this technique in the field of conservation science.

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Single-sided NMR: a non-invasive diagnostic tool for monitoring swelling effects in paint films subjected to solvent cleaning

Cited by 11 publications

References 17 publications

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

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

New Insights to Characterize Paint Varnishes and to Study Water in Paintings by Nuclear Magnetic Resonance Spectroscopy (NMR)

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