Analysis of silver coins from colonial Brazil by hand held XRF and micro-XRF

Felix, Valter S.; Pereira, Marcelo O.; Freitas, Renato Pereira de; Aranha, Paula J.M.; Heringer, Pedro C.S.; Anjos, M.J.; Lopes, Ricardo Tadeu

doi:10.1016/j.apradiso.2020.109409

Cited by 10 publications

(2 citation statements)

References 45 publications

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“…Entretanto, para investigar melhor essas diferenças, os dados de XRF coletados em ambos os grupos das obras de arte foram submetidos a uma Análise de Componentes Principais (PCA). Trata-se de um método amplamente difundido na investigação de similaridades e diferenças de artefatos do patrimônio histórico cultural, a partir de dados analíticos [11,[24][25][26]. Neste trabalho o PCA foi realizado empregando os dados dos espectros de XRF coletados nas telas autênticas e questionadas.…”

Section: Análises Físico-químicasunclassified

Exame forense de obras de artes do pintor Ivan Serpa

Thaumaturgo¹,

Liarth²,

Oliveira³

et al. 2023

Rev. Bras. Crimin.

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Neste trabalho é apresentado os resultados do exame forense de três obras de arte questionadas atribuídas inicialmente ao pintor carioca Ivan Serpa. As obras investigadas foram apreendidas em uma operação policial realizado por agentes da Polícia Civil do estado do Rio de Janeiro. Sendo a investigação forense realizada no Instituto de Criminalística Carlos Éboli da Polícia Civil do Rio de Janeiro (ICCE/PCERJ). Foram empregados três métodos para o exame forense das pinturas: avaliação merceológica, estudo grafotécnico e análise físico-química. Os resultados das telas questionadas foram comparados com obras de arte autênticas de Ivan Serpa. Os resultados dos três exames mostraram grandes divergências entre as obras questionadas e autênticas, indicando que são artefatos contrafeitos. O estudo foi realizado através de uma parceria entre o ICCE/PCERJ e o Instituto Federal do Rio de Janeiro (IFRJ). O IFRJ possui experiência na investigação de artefatos do patrimônio histórico-cultural por análises físico-químicas, logo este trabalho além de permitir solucionar um caso judicial possibilitou implementar no ICCE/PCERJ uma metodologia de investigação forense de obras de arte.

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Section: Análises Físico-químicasunclassified

Exame forense de obras de artes do pintor Ivan Serpa

Thaumaturgo¹,

Liarth²,

Oliveira³

et al. 2023

Rev. Bras. Crimin.

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“…In the motley world of cultural heritage, metals are among the main actors since the emergence of metalworking of gold, silver, and copper [1]. Due to their inherent chemo-physical properties and aesthetic potential, metals have had a broad spectrum of applications in art through the ages: sculptures, musical instruments, jewelry, utensils, scientific instruments, decorative arts, and so forth [2][3][4][5][6][7]. Such a massive presence in cultural heritage has inevitably yielded a plethora of studies on metal preservation to safeguard this inheritance through generations.…”

Section: Metal Care In Cultural Heritage: An Overviewmentioning

confidence: 99%

Biologically Derived Gels for the Cleaning of Historical and Artistic Metal Heritage

et al. 2021

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In the general global rise of attention and research to seek greener attitudes, the field of cultural heritage (CH) makes no exception. In the last decades, an increasing number of sustainable and biologically based solutions have been proposed for the protection and care of artworks. Additionally, the safety of the target artwork and the operator must be kept as core goals. Within this scenario, new products and treatments should be explored and implemented in the common conservation praxes. Therefore, this review addressing metal heritage is aimed to report biologically derived gel formulations already proposed for this specific area as reliable tools for cleaning. Promising bio-gel-based protocols, still to be implemented in metal conservation, are also presented to promote their investigation by stakeholders in metal conservation. After an opening overview on the common practices for cleaning metallic surfaces in CH, the focus will be moved onto the potentialities of gel-alternatives and in particular of ones with a biological origin. In more detail, we displayed water-gels (i.e., hydrogels) and solvent-gels (i.e., organogels) together with particular attention to bio-solvents. The discussion is closed in light of the state-of-the-art and future perspectives.

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On‐Site X‐Ray Fluorescence Analysis of Sculptures of the Archdiocesan Museum of Sacred Art of Rio de Janeiro's Collection

Franzi,

Paula,

Cavalcante

et al. 2024

X-Ray Spectrometry

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The artworks of the Archdiocesan Museum of Sacred Art of Rio de Janeiro (MAAS‐RJ) are distinguished for their combination of Luso‐Brazilian Sacred Arts and dedication to historical heritage preservation. An in situ analysis using x‐ray fluorescence (XRF) was conducted on five pieces from the collection, including Our Lady of the Expectation, Our Lady of Lapa, Our Lady of Penha de France, Saint Sebastian, and the Glory of the Divine. The analysis employed the portable Bruker Tracer‐III‐SD equipment, which features a Rhodium‐target x‐ray tube and a Silicon detector. Spectra were obtained with the device set at 40 kV and 35 μA, with a 60‐s exposure time. The multi‐element analysis identified the elements present in the pictorial layers, allowing the identification of pigments used in the original polychromes and repaints. The data revealed a diverse composition of pigments across the original, repainted, and polychrome regions. Elements indicative of pigments applied after the creation of the works, consistent with restoration and interventions, were detected. The XRF analysis confirmed the use of gilding techniques in some sculptures, such as Our Lady of the Expectation and the Glory of the Divine. The sculpture of Our Lady of Penha de France exhibited gilding techniques with sgraffito. This study provided the elemental composition of the examined sacred artworks, suggesting potential pigments regardless of their preservation conditions.

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Analysis of silver coins from colonial Brazil by hand held XRF and micro-XRF

Cited by 10 publications

References 45 publications

Exame forense de obras de artes do pintor Ivan Serpa

Exame forense de obras de artes do pintor Ivan Serpa

Biologically Derived Gels for the Cleaning of Historical and Artistic Metal Heritage

On‐Site X‐Ray Fluorescence Analysis of Sculptures of the Archdiocesan Museum of Sacred Art of Rio de Janeiro's Collection

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