Travelling Beneath the Gold Surface – Part I: Study and Characterization of Laboratory Reconstructions of Portuguese Seventeenth and Eighteenth Centuries Ground and Bole Layers

Sandu, Irina Crina Anca; Paba, Francesca; Murta, Elsa; Pereira, M.F.C.; Ribeiro, C

doi:10.18236/econs2.201413

Cited by 2 publications

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“…Todas as camadas apresentam boa adesão e coesão e não são visíveis vestígios de redouramento (Figura 2). Apesar de muitos dos tratados dos séculos XVII e XVIII referirem a aplicação de um mínimo de três camadas de gesso grosso, três de gesso sotile e quatro de bolo, sendo o ideal a aplicação de cinco de cada num total de 15 [18,33], não é possível distinguir através de OM e SEM o número exacto de aplicações em cada camada [34][35][36]. A análise por SEM-EDS da preparação e do bolo revelou a presença de S e Ca e de Al, Si e Fe, respectivamente.…”

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Technological and compositional study of the gold leaf from Baroque altarpieces – basis for a research methodology

et al. 2018

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Technological and compositional study of the gold leaf from Baroque altarpieces-basis for a research methodology Resumo Foi estudada a folha de ouro do retábulo-mor da igreja de Jesus em Aveiro, um dos mais interessantes exemplares de talha barroca portuguesa, localizado no actual Museu da Cidade e antigo Convento de Jesus. Efectuaram-se análises qualitativas dos cortes estratigráficos por microscopia óptica e identificaram-se três camadas distintas-preparação branca, bolo e ouro-consistentes com a aplicação de um douramento tradicional. A utilização de microscopia electrónica de varrimento com espectrometria de raios X por dispersão de energia (SEM-EDS) mostrou o uso de uma liga ternária de Au, Ag e Cu com aproximadamente 22 quilates. Através de espectrometria de massa com plasma indutivo (ICP-MS) identificaram-se elementos-traço: Cr, Pt, Pd e Sn nas camadas ouro e Pb e Hg no bolo. O emprego de microfluorescência de raios X por radiação de sincrotrão (SR-µXRF) permitiu confirmar a presença de Sn e traçar o perfil dos principais elementos presentes nas amostras.

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Section: Resultsunclassified

Technological and compositional study of the gold leaf from Baroque altarpieces – basis for a research methodology

et al. 2018

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“…Finally, the golden decorations on the sleeve of the priest in the middle were probably realized through the application of sheets of gold leaf posed on an iron-rich adhesive substrate, the so-called bole [13]. In fact, the XRF analysis showed high counts of Fe, together with Au.…”

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Non-invasive characterization of Bernardino Luini’s color palette: a spectroscopic campaign on the frescos of Santuario della Beata Vergine dei Miracoli in Saronno (Italy)

Fiocco¹,

Albano²,

Merlo³

et al. 2023

Proceedings of the 2022 IMEKO TC4 International Conference on Metrology for Archaeology and Cultural Heritage

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One of the greatest masters of northern Italian art between the 15th and 16th centuries is certainly Bernardino Luini, who was strongly influenced along with other important artists of his period by the painting technique of Leonardo da Vinci. In this paper, we report the results of the analytical campaign conducted on two wall paintings depicting the Marriage of the Virgin and the Adoration of the Christ Child made by Luini in the Santuario della Beata Vergine dei Miracoli in Saronno (Italy) between 1525 and 1529. The multi-analytical approach through X-ray fluorescence (XRF), Fourier transform infrared reflection (R-FTIR) and Raman spectroscopy allowed us to characterize the color palette used in the paintings and thus, through comparison of the results, to provide support for a more certain attribution of the Adoration of the Christ Child.

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Travelling Beneath the Gold Surface – Part I: Study and Characterization of Laboratory Reconstructions of Portuguese Seventeenth and Eighteenth Centuries Ground and Bole Layers

Cited by 2 publications

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Technological and compositional study of the gold leaf from Baroque altarpieces – basis for a research methodology

Technological and compositional study of the gold leaf from Baroque altarpieces – basis for a research methodology

Non-invasive characterization of Bernardino Luini’s color palette: a spectroscopic campaign on the frescos of Santuario della Beata Vergine dei Miracoli in Saronno (Italy)

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