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'Conservação de jóias arcaicas em ouro'

2014 Publication

PAPER, GOLD ARCHAIC JEWELS, AuCORRE PROJECT

  • Matthias Tissota,b, Manuel Lemosa. 2014. Levantamento do estado de conservação das joias arcaicas em ouro da Sala do Tesouro do Museu Nacional de Arqueologia (Survey of the state of conservation of gold archaic jewels from the Treasure Room of the National Museum of Archaeology). In A Ourivesaria Pré-histórica do Ocidente Peninsular Atlântico. Compreender para Preservar (The Prehistoric Goldwork of the Western Peninsular Atlantic. Understand to Preserve), pp. 86-93, Guerra e Tissot (ed.), AuCORRE, Lisboa

    a Archeofactu  b National Museum of Archaeology

Abstract
A number of pieces in the Treasure Room of the National Museum of Archaeology (MNA) show signs of surface corrosion, characterized by stains of varying shades. Alongside the study of the room's display conditions, an exhaustive survey of the conservation status of the gold alloy objects was conducted. This assessment included visual observation of the pieces, both of the surface (e.g., corrosion products and their extent) and the structure (e.g., presence of cracks and fractures), as well as the manufacturing and decoration techniques. Simultaneously, a survey of the precise location of the objects in the Treasure Room was also carried out. This survey aimed to identify the parameters (endogenous and exogenous) that may contribute to the development of corrosion.

Different stages of corrosion development
Torques of Codeçais: different levels of corrosion development.
Archer's armband, front and back, the differences in surface alteration.