Preparation of cross-sections from easel paintings

Khandekar, Narayan

doi:10.1179/sic.2003.48.supplement-1.52

Cited by 39 publications

(30 citation statements)

References 12 publications

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“…The observation and photography of the samples (100x magnification) were obtained using optical microscopy (OM), with polarised and transmitted light (Zeiss Stemi, 2000-C), with an external artificial light system Zeiss KL 1500 LCD, image acquisition with digital camera AxioCam MRcS, and an Axio Vs 40 V4.4 Carl Zeiss Vision GmbH acquisition and treatment software. The mounting and observation of the samples followed the procedures applied to the analysis of easel paintings or polychrome sculptures (Khandekar, 2003). The study of the cross-sections allows determining the number, thickness, adhesion and cohesion of layers, the shape and size of the particles (Calvo, 2003), and the presence of more than one gilding; it also allows comparing the ground layer and the bole layer.…”

Section: Methodsmentioning

confidence: 99%

Gold leaf analysis of three baroque altarpieces from Porto

Bidarra¹,

Coroado²,

Rocha³

2009

archeosciences

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Section: Methodsmentioning

confidence: 99%

Gold leaf analysis of three baroque altarpieces from Porto

Bidarra¹,

Coroado²,

Rocha³

2009

archeosciences

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“…A aquisição das imagens foi realizada com uma câmara AxioCam MRcS e um equipamento de aquisição e tratamento de imagem Axio Vs 40 V4.4 Carl Zeiss Vision GmbH. A montagem e observação das amostras seguiram os procedimentos aplicados na análise de pintura e escultura policromada [5]. O estudo da estratigrafia permite analisar o número de camadas, espessura, cor, textura e ouros aspectos físicos das amostras, nomeadamente a coesão entre camadas, a forma, organização e dimensão das partículas e a presença de repintes [6].…”

Section: Microscopia óPtica (Om)unclassified

Technical study of an eighteenth century clay Nativity scene

Bidarra¹,

Antunes²

2014

Cons. Património

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The Nativity scene (presépio), from the Santuário de Nossa Senhora dos Remédios, in Lamego (Portugal), is a rare and precious example of Portuguese clay sculpture from the eighteenth century. This Nativity scene presents more than 60 polychrome clay sculptures, with heights between 10 and 18 cm. The main figures show rich details and techniques, similar to the wooden sculpture decorative motives from the same century: glass eyes, lace, sequins, silver halos, glazes and metallic leafs. The presépio is contained within a wooden polychrome structure -a reliquary. Several analytical techniques were carried out in order to characterise some of the physical and chemical features of the materials. The qualitative and semi-quantitative analyses of the pigments were performed by optical microscopy and by scanning electron microscopy coupled with energy dispersive X-ray spectrometry. The technical investigation preceded the conservation and restoration of the sculptures. ResumoO presépio em barro pertencente ao Santuário de Nossa Senhora dos Remédios, em Lamego (Portugal), é um precioso exemplar da escultura portuguesa em barro do século XVIII. O conjunto é composto por mais de 60 esculturas em barro policromado, com alturas entre os 10 e os 18 cm. As principais figuras evidenciam pormenores e técnicas semelhantes à escultura em madeira do mesmo período: olhos de vidro, rendas, lantejoulas, coroas, vernizes e aplicação de folha metálica. O presépio encontra-se numa maquineta em madeira. Foram efectuados diversos exames laboratoriais de forma a permitir uma caracterização física e química dos materiais e a análise tecnológica do conjunto. A análise qualitativa e semi-quantitativa dos pigmentos foi realizada por microscopia óptica e por microscopia electrónica de varrimento com espectrometria de raios X por dispersão de energia. O estudo tecnológico precedeu a intervenção de conservação e restauro do conjunto.Conservar Património 20 (2014) 65-73 |

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“…The use of microscopy (sensu stricto) is well known in the popular understanding of what might be considered 'high' cultural heritage-fine art conservation in particular (4,5], typified by the analysis of paint layers cross sections [6] and x-ray and infra-red analyses of canvases [7]. Petrographic analysis of cultural materials itself has an application history in archaeological work stretching back at least to near the advent of the use of thin sections for lithological characterisation.…”

Section: Application Of Microscopy To the Built Historic Environmentmentioning

confidence: 99%

Ineducable us: the applications and contexts of microscopy used for the characterisation of historic building materials

Hughes

2017

RILEM Tech Lett

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The analysis by microscopy of the compositions and microstructures of geomaterials found in historic structures and buildings is integral to archaeological, art-historical, conservation and restoration-related investigations, and supports decision making for material replacement and repair. In archaeology there is a need to elucidate past social, economic and technological processes, and to understand the environmental impacts of past human activities related to materials use. Standard light and electron microscopy are most commonly employed, but high resolution methods such as transmission electron and three-dimensional tomography such as µ-CT are also being used. Experimental and novel developments, where they overlap with advanced materials science, are uncommon. The application of scientific characterisation frames cultural heritage value, reinforcing our understanding of authenticity and integrity. Characterisation is constrained, in turn, by the values system that operates in cultural heritage. International charters and conservation philosophy necessitate the application of science to contextualising conservation. However, the appearance of science in heritage work has also led to the performance of science for its own sake ('endoscience', sensu Muñoz Viñas, Contemporary Theory of Conservation, Routledge, 2011). This moves some to suggest that there is a disconnect between scientific work and its practical value. Apparent communication problems between scientists applying microscopy and other stakeholders require changes to management of material characterisation in heritage projects.

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Preparation of cross-sections from easel paintings

Cited by 39 publications

References 12 publications

Gold leaf analysis of three baroque altarpieces from Porto

Gold leaf analysis of three baroque altarpieces from Porto

Technical study of an eighteenth century clay Nativity scene

Ineducable us: the applications and contexts of microscopy used for the characterisation of historic building materials

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