期刊
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
卷 397, 期 7, 页码 2717-2725出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00216-010-3610-2
关键词
Artworks; Mineral support; Monitoring; Portability; Raman spectroscopy; Restoration
资金
- Basque Government [UE05-A09]
- MICINN (the Science and Innovation Ministry of the Spanish Government) [BIA2008-06592]
Any restoration performed on cultural heritage artworks must guarantee a low impact on the treated surfaces. Although completely risk-free methods do not exist, the use of tailor-made procedures and the continuous monitoring by portable instrumentation is surely one of the best approaches to conduct a modern restoration process. In this work, a portable Raman monitoring, combined sometimes with spectroscopic techniques providing the elemental composition, is the key analysis technique in the three-step restoration protocol proposed: (a) in situ analysis of the surface to be treated (original composition and degradation products/pollutants) and the cleaning agents used as extractants, (b) the thermodynamic study of the species involved in the treatment in order to design a suitable restoration method and (c) application and monitoring of the treatment. Two cleaning operations based on new technologies were studied and applied to two artworks on mineral supports: a wall painting affected by nitrate impact, and a black crusted stone (chalk) altarpiece. Raman bands of nitrate and gypsum, respectively, decreased after the step-by-step operations in each case, which helped restorers to decide when the treatment was concluded, thus avoiding any further damage to the treated surface of the artworks.
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