Identification of adulterants in artistic earth pigments using a multi-technique approach

Cáceres-Rivero, Cynthia; Tupa-Quispe, Ana Luz; Torres-Casas, Ronaldo; Bedregal, Patricia

doi:10.1016/j.rechem.2022.100561

Cited by 2 publications

(2 citation statements)

References 49 publications

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“…Yellow ochre consisted of a mixture of the iron hydroxide goethite and other minerals, such as quartz, calcite, gypsum and chlorite. A similar composition was found in the pigment characterization performed by [40]. Similarly, the massicot spectrum included the lead oxide mineral (massicot) and other minerals, among which chalcopyrite and pyrophyllite.…”

Section: Mineralogical Analysis Of Pigment Powderssupporting

confidence: 68%

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A Non-Invasive and Sustainable Characterization of Pigments in Wall Paintings: A Library of Apulian Colors

et al. 2023

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This paper proposed a multianalytical, non-invasive, accessible and expensive (compared to traditional ones) approach for the characterization of pictorial surfaces. A set of 18 pigments and 37 mixtures widely used in the Middle Ages in the Apulia (Italy) artistic and archaeological contexts was considered, and corresponding replicas were produced. Pigments were first characterized by X-ray powder diffraction (XRPD), then replicas were studied by optical microscopy using a portable instrument, colorimetry and fiber optic reflectance spectroscopy (FORS). The investigation provided encouraging results, which allowed the creation of a library including diagnostic microscopic, colorimetric and reflectance markers of each pigment and the identification of the mixtures’ components.

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Section: Mineralogical Analysis Of Pigment Powderssupporting

confidence: 68%

“…Brown earth [38][39][40][41][42][43][44][45][46] showed a bimodal distribution due to a finer and not visible fraction together with larger (20 µm), massive, rounded particles of a dark red pigment with low saturation, brightness and gloss of color.…”

Section: Microscopic Observation 421 Pure Pigments Replicasmentioning

confidence: 99%

A Non-Invasive and Sustainable Characterization of Pigments in Wall Paintings: A Library of Apulian Colors

et al. 2023

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X-ray fluorescence (XRF) on painted heritage objects: a review using topic modeling

Harth

2024

Herit Sci

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This review presents the computational method of topic modeling to identify core topics and time trends in research on X-ray fluorescence (XRF) and its application to cultural heritage. Topic modeling is an approach to text mining based on unsupervised machine learning, which helps to determine core topics within a vast body of text. Due to the large amount of published work on X-ray fluorescence in the area of cultural heritage, traditional literature review has become impractical, inefficient, time-consuming, and potentially less reliable. Therefore, it is important to take stock of which topics have been core to such research and whether specific time trends can be identified within them. Using topic modeling, this review aims to reveal core topics and trends in research on XRF analysis of painted heritage objects by examining 982 articles collected from Web of Science. Within this dataset of articles, ten topics have been identified. The identified topics can be clustered in three main categories: the methods used, the objects studied, and the specific materials studied. In terms of trends in topic share since 2010, it is especially noteworthy to see that the share of articles focused on the identification and study of painting materials and techniques has more than doubled. Similarly, another impressive increase can be observed for articles centered on advanced imaging spectroscopic techniques, such as macro X-ray fluorescence (MA-XRF) and reflectance hyperspectral imaging, for the study of easel paintings. The share of attention within XRF literature given to imaging spectroscopic techniques tripled between 2010 and 2017, though stabilizing in the subsequent years. Conversely, the share of articles which specifically deal with the development and improvement of energy dispersive X-ray fluorescence (ED-XRF) spectroscopic techniques (i.e., portable ED-XRF, confocal micro-XRF, micro-grazing exit XRF) for the elemental analysis (including elemental depth profiling) of painted heritage objects has declined sharply.

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Identification of adulterants in artistic earth pigments using a multi-technique approach

Cited by 2 publications

References 49 publications

A Non-Invasive and Sustainable Characterization of Pigments in Wall Paintings: A Library of Apulian Colors

A Non-Invasive and Sustainable Characterization of Pigments in Wall Paintings: A Library of Apulian Colors

X-ray fluorescence (XRF) on painted heritage objects: a review using topic modeling

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