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'Proteger para conservar'

2009 Publication

PAPER, MAGAZINE CORROSION AND PROTECTION OF MATERIALS

a Researcher b Portuguese Institute of Conservation and Restoration c Centre for Atomic Physics, University of Lisboa
d Research Centre for Materials, CENIMAT/i3N, FCT/UNL e Archeofactu

Abstract
The present work concerns the conservation of the Tomb of D. Afonso de Portugal (1390-1400), the first born of King D. João I, a major work of art from the Portuguese medieval period. The tomb set - ark, effigy and baldachin – is composed by gilded and silvered copper plates fixed to a wooden structure. The techniques of decoration - the fire gilding and amalgam silvering - were used as coatings of the copper substrate, having a dual function - decorative and protective. It is emphasized the alteration and conservation issues of these coatings and the solutions adopted in the application of a protective layer during the tomb conservation, considering the exhibition place, the Cathedral of Braga, a strong constraint to preserve the object for a long period of time.

Before the intervention.
Decorative panels with surface colouring resulting from the layer of alteration products.
Hands of the recumbent, with the surface coloration resulting from the layer of weathering products.
After the intervention.