10 documents found, page 1 of 1
Exploring photozincographic metal plates collections: Manufacturing techniques ...
Ioaneș, Alexandra; Roldão, Élia; Cunha Diamantino, Teresa; Tissot, IsabelABSTRACT: This study explores the materials, manufacturing processes, and corrosion behavior of photozincographic plates from the Lactário Museum in Lisbon, Portugal. Analysis of thirty-three historical plates (1927–1971) and three non-historical plates using stereomicroscopy, micro-X-ray fluorescence, X-ray diffraction, and accelerated aging tests revealed that the plates are primarily composed of zinc with tr...
Conservation of industrial and technological heritage
Wain, Alison; Filipe, Graça; Tissot, Isabel; Brambilla, Laura; Manso, MartaThe preservation of industrial and technological heritage appears as a subject in the field of cultural heritage and museology in the 1970s. However, its conservation practice is relatively recent compared to other expertise areas. Therefore, conservation assessment, intervention, and maintenance methodologies for this type of heritage are still open questions.; A preservação do património industrial e tecnológ...
Looking into historical cracks analysing repaired silver objects by electron mi...
Tissot, Isabel; Barreiros, M. Alexandra; Lemos, Manuel; Tissot, MatthiasABSTRACT: The identification of structural alterations of silver alloy objects of cultural interest is essential to assess their state of conservation and define maintenance programmes. Alterations induced by previous repair and cleaning actions strongly affect the conservation condition, influencing the type and extension of conservation procedures. The detailed analysis of ancient repairs is a subject to be i...
Looking into historical cracks analysing repaired silver objects by electron mi...
Tissot, Isabel; Barreiros, M. Alexandra; Lemos, Manuel; Tissot, MatthiasABSTRACT: The identification of structural alterations of silver alloy objects of cultural interest is essential to assess their state of conservation and define maintenance programmes. Alterations induced by previous repair and cleaning actions strongly affect the conservation condition, influencing the type and extension of conservation procedures. The detailed analysis of ancient repairs is a subject to be i...
Book review: Virginia Costa, Modern Metals in Cultural Heritage, understanding ...
Tissot, IsabelThe conservation of modern metals–such as aluminium, stainless, and weathering steels–used as materials of contemporary works of art is a major challenge for conservators and curators. The recent application of these metals, in use since the beginning of the nineteenth century, makes for the lack of conservative measurements and conservation programs on such materials. In order to achieve this, a detailed ident...
When gold stops glittering: corrosion mechanisms of René Lalique's Art Nouveau ...
Tissot, Isabel; Correia, Jorge; Monteiro, Olinda C.; Barreiros, M. Alexandra; Guerra, M. F.ABSTRACT: Art Nouveau jewellery created by René Lalique is presently corroded. To identify the corrosion processes, Au-Ag-Cu alloys with compositions comparable to those used in the René Lalique’s jewellery were fabricated to be exposed to sulphide-containing environments. Using SEM-EDS, XRD, UV-Vis spectroscopy and ellipsometry, it was for the first time demon-strated that at the surface of tarnished Au alloys...
When gold stops glittering: corrosion mechanisms of René Lalique's Art Nouveau ...
Tissot, Isabel; Correia, Jorge; Monteiro, Olinda C.; Barreiros, M. Alexandra; Guerra, M. F.ABSTRACT: Art Nouveau jewellery created by René Lalique is presently corroded. To identify the corrosion processes, Au-Ag-Cu alloys with compositions comparable to those used in the René Lalique’s jewellery were fabricated to be exposed to sulphide-containing environments. Using SEM-EDS, XRD, UV-Vis spectroscopy and ellipsometry, it was for the first time demon-strated that at the surface of tarnished Au alloys...
A multi-analytical approach to gold in Ancient Egypt: studies on provenance and...
Tissot, Isabel; Troalen, L. G.; Manso, M.; Ponting, M.; Radtke, U.; Barreiros, M. Alexandra; Shaw, I.; Carvalho, M. L.; Guerra, M. F.Recent results from a three-year multi-disciplinary project on Ancient Egyptian gold jewellery revealed that items of jewellery from the Middle Kingdom to the New Kingdom were manufactured using a variety of alluvial gold alloys. These alloys cover a wide range of colours and the majority contain Platinum Group Elements inclusions. However, in all the gold foils analysed, these inclusions were found to be absen...
The earrings of Pancas treasure: Analytical study by X-ray based techniques – A...
Tissot, Isabel; Tissot, M.; Manso, M.; Alves, L. C.; Barreiros, M. Alexandra; Marcelo, Teresa; Carvalho, M. L.; Corregidor, V.; Guerra, M. F.The development of new metallurgical technologies in the Iberian Peninsula during the Iron Age is well represented by the 10 gold earrings from the treasure of Pancas. This work presents a first approach to the analytical study of these earrings and contributes to the construction of a typological evolution of the Iberian earrings. The manufacture techniques and the alloys composition were studied with three co...
The earrings of Pancas treasure: Analytical study by X-ray based techniques – A...
Tissot, Isabel; Tissot, M.; Manso, M.; Alves, L. C.; Barreiros, M. Alexandra; Marcelo, Teresa; Carvalho, M. L.; Corregidor, V.; Guerra, M. F.The development of new metallurgical technologies in the Iberian Peninsula during the Iron Age is well represented by the 10 gold earrings from the treasure of Pancas. This work presents a first approach to the analytical study of these earrings and contributes to the construction of a typological evolution of the Iberian earrings. The manufacture techniques and the alloys composition were studied with three co...