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Keywords = EPR mobile universal surface explorer

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14 pages, 3113 KiB  
Article
The Ability of the EPR MOUSE to Study Underpaintings
by Stanley E. Liang, Olivia R. Kuzio, Matthew Pupko, Max Robbins and Joseph P. Hornak
Heritage 2023, 6(7), 5524-5537; https://doi.org/10.3390/heritage6070291 - 22 Jul 2023
Cited by 2 | Viewed by 1448
Abstract
The possibility of using the electron paramagnetic resonance (EPR) mobile universal surface explorer (MOUSE) to study underpaintings is validated. The depth sensitivity of the EPR MOUSE is measured using an EPR standard, and is verified using three paramagnetic pigments in an acrylic binder [...] Read more.
The possibility of using the electron paramagnetic resonance (EPR) mobile universal surface explorer (MOUSE) to study underpaintings is validated. The depth sensitivity of the EPR MOUSE is measured using an EPR standard, and is verified using three paramagnetic pigments in an acrylic binder under opaque acrylic layers of titanium white and lead white. The ability to distinguish and identify two layers of EPR signal-bearing pigments is shown using pairwise sets of ultramarine, Egyptian, and Han blue pigments in an acrylic binder. And finally, the spatial imaging capability is demonstrated using a printed design of magnetite black covered with a solid second layer of the pigment. These studies demonstrate that EPR spectroscopy with the EPR MOUSE is a viable method for studying paramagnetic and ferrimagnetic underlayers of pigments. Full article
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11 pages, 1828 KiB  
Article
Mapping Pigments in a Painting with Low Frequency Electron Paramagnetic Resonance Spectroscopy
by Shane McCarthy, Haley Wiskoski and Joseph P. Hornak
Heritage 2021, 4(3), 1182-1192; https://doi.org/10.3390/heritage4030065 - 10 Jul 2021
Cited by 5 | Viewed by 2794
Abstract
An electron paramagnetic resonance (EPR) mobile universal surface explorer (MOUSE) was recently introduced for noninvasively studying paramagnetic pigments in paintings. This study determined that the EPR MOUSE could map the spatial locations of four pigments in a simple impasto painting. Results from three [...] Read more.
An electron paramagnetic resonance (EPR) mobile universal surface explorer (MOUSE) was recently introduced for noninvasively studying paramagnetic pigments in paintings. This study determined that the EPR MOUSE could map the spatial locations of four pigments in a simple impasto painting. Results from three spectral identification algorithms were examined to assess their ability to identify the pigments using an unsupervised approach. Resulting pigment maps are displayed as colorized images of the spatial distribution of the pigments. All three algorithms produced reasonable representations of the painting. The algorithms achieved excellent true positive, true negative, false positive, and false negative rates of ≥0.95, ≥0.98, ≤0.02, and ≤0.05, respectively, for the identification of the pigments. We conclude that the EPR MOUSE is suitable for accurately mapping the location of paramagnetic pigments in a painting. Full article
(This article belongs to the Section Artistic Heritage)
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12 pages, 1354 KiB  
Article
The Noninvasive Analysis of Paint Mixtures on Canvas Using an EPR MOUSE
by Elizabeth A. Bogart, Haley Wiskoski, Matina Chanthavongsay, Akul Gupta and Joseph P. Hornak
Heritage 2020, 3(1), 140-151; https://doi.org/10.3390/heritage3010009 - 12 Mar 2020
Cited by 7 | Viewed by 3650
Abstract
Many artists create the variety of colors in their paintings by mixing a small number of primary pigments. Therefore, analytical techniques for studying paintings must be capable of determining the components of mixtures. Electron paramagnetic resonance (EPR) spectroscopy is one of many techniques [...] Read more.
Many artists create the variety of colors in their paintings by mixing a small number of primary pigments. Therefore, analytical techniques for studying paintings must be capable of determining the components of mixtures. Electron paramagnetic resonance (EPR) spectroscopy is one of many techniques that can achieve this, however it is invasive. With the recent introduction of the EPR mobile universal surface explorer (MOUSE), EPR is no longer invasive. The EPR MOUSE and a least squares regression algorithm were used to noninvasively identify pairwise mixtures of seven different paramagnetic pigments in paint on canvas. This capability will help art conservators, historians, and restorers to study paintings with EPR spectroscopy. Full article
(This article belongs to the Section Artistic Heritage)
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