Sobre os materiais utilizados na talha da época barroca do noroeste de Portugal - primeiros resultados

• Autor(a) principal: Barata, Carolina
• Data de Publicação: 2012
• Outros Autores: Cruz, António João, Rocha, Fernando Tavares
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10400.14/19575
• topic: Altarpiece; Gilded wood; Gesso; Bole; Gold leaf; Optical microscopy; Scanning electron microscopy

Aiming to contribute to the knowledge of Portuguese gilded wood from the Baroque, the first results of a study of 18 retables belonging to Oporto are presented. In order to identify the materials and the techniques used in gesso, bole and gold leaf layers, optical microscopy and scanning electron microscopy were used. Anhydrite and gypsum with low concentration of impurities, bole of good quality and gold alloys with a concentration of gold usually above 90% were identified. The results suggest that recommendations found in historical documents have been followed in the majority of the cases.