An imaging and spectroscopic methodology for in situ analysis of ceiling and wall decorations in Colonial missions in Northern Mexico from XVII to XVIII centuries
| Autor: | José Luis Ruvalcaba-Sil, Edgar Casanova-González, Isaac Rangel-Chávez, Alejandro Mitrani, Miguel Ángel Maynez-Rojas, Karla Muñoz-Alcocer, María Angélica García-Bucio |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Archeology
Cochineal Molecular composition lcsh:Fine Arts Reflectance spectroscopy XRF lcsh:Analytical chemistry 02 engineering and technology Conservation Non-destructive analysis Ceiling (cloud) Colonialism 01 natural sciences Mexican colonial missions FORS Painting lcsh:QD71-142 biology 010401 analytical chemistry 021001 nanoscience & nanotechnology biology.organism_classification Archaeology 0104 chemical sciences False color infrared imaging In situ analysis lcsh:N 0210 nano-technology |
| Zdroj: | Heritage Science, Vol 8, Iss 1, Pp 1-14 (2020) |
| ISSN: | 2050-7445 |
| DOI: | 10.1186/s40494-020-00434-8 |
| Popis: | Almost three hundred Spanish colonial missions—or their remains—are scattered over the vast state of Chihuahua in northern Mexico. A few of them still display painted decorations on the wood ceilings and walls. The decorated areas vary greatly, from the whole ceiling of the main aisle to just a few square meters in a lateral chapel, and so does the conservation state of the paintings. In this context, the information regarding the paintings’ composition plays a key role in the restoration and conservation processes. For the gathering of such information, we propose a combined methodology for a fast, non-destructive and non-invasive characterization of such paintings with a minimum of techniques. This methodology includes false color infrared imaging as a first approach to determine the composition of large areas of the paintings and the homogeneity of the materials used in the painted areas, followed by small area analysis by X-ray fluorescence and fiber-optics reflectance spectroscopy. This methodology was applied to characterize the elemental and molecular composition of the decorations for four missions in Chihuahua in a fast and specific manner, revealing the use of a mix of mineral and organic materials including indigo and cochineal, and detecting differences between the missions. The methodology presented here can be easily applied for the study of a wider number of missions in Chihuahua and other regions to provide outstanding information of materials, pictorial techniques and deterioration conditions. |
| Databáze: | OpenAIRE |
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