A multi-analytical investigation of the materials and painting technique of a wall painting from the church of Copacabana de Andamarca (Bolivia)

The Andean church of Our Lady of Copacabana de Andamarca in Bolivia was built in 1723. Its walls are made of adobe bricks and are decorated with paintings dated from mid 18th century. Before a restoration process involving the governments of Bolivia and the Federal Republic of Germany, seven microsa...

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Autores principales: Tomasini, Eugenia Paula, Maier, Marta Silvia
Publicado: 2016
Materias:
Brochantite
Colonial art
Gas chromatography-mass spectrometry
Raman and IR spectroscopy
SEM-EDS
Wall painting
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0026265X_v128_n_p172_Tomasini
http://hdl.handle.net/20.500.12110/paper_0026265X_v128_n_p172_Tomasini
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_0026265X_v128_n_p172_Tomasini
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spelling paper:paper_0026265X_v128_n_p172_Tomasini2025-07-30T17:35:34Z A multi-analytical investigation of the materials and painting technique of a wall painting from the church of Copacabana de Andamarca (Bolivia) Tomasini, Eugenia Paula Maier, Marta Silvia Brochantite Colonial art Gas chromatography-mass spectrometry Raman and IR spectroscopy SEM-EDS Wall painting The Andean church of Our Lady of Copacabana de Andamarca in Bolivia was built in 1723. Its walls are made of adobe bricks and are decorated with paintings dated from mid 18th century. Before a restoration process involving the governments of Bolivia and the Federal Republic of Germany, seven microsamples were extracted from representative colors of one of the wall paintings inside the church. The aim of our research was to characterize the chromatic palette and investigate the painting technique of this Andean colonial wall painting. To approach these goals, an integrated investigation comprising Raman and FTIR-ATR spectroscopy, optical microscopy (OM), scanning electron microscopy with X-ray microanalysis (SEM-EDS), gas chromatography (GC), and gas chromatography mass spectrometry (GC-MS) was carried out.The results indicated the use of a mixture of two basic copper sulfates of mineral origin, brochantite and antlerite, as the green pigment, adding relevant information to the palette of green pigments in colonial art. Yellow, orange and red ochre, abundant pigments in the Andean region, were also characterized. Observation by optical microscopy of cross-sections of the embedded microsamples and analysis of organic binders by GC and GC-MS pointed to a secco technique and the use of a mixture of egg and vegetable oil ("tempera grassa") as the pigment binder.In conclusion, our results allowed to establish the pigment palette and offered new insights into the painting technique of Andean wall paintings. © 2016 . Fil:Tomasini, E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Maier, M.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0026265X_v128_n_p172_Tomasini http://hdl.handle.net/20.500.12110/paper_0026265X_v128_n_p172_Tomasini
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Brochantite
Colonial art
Gas chromatography-mass spectrometry
Raman and IR spectroscopy
SEM-EDS
Wall painting
spellingShingle Brochantite
Colonial art
Gas chromatography-mass spectrometry
Raman and IR spectroscopy
SEM-EDS
Wall painting
Tomasini, Eugenia Paula
Maier, Marta Silvia
A multi-analytical investigation of the materials and painting technique of a wall painting from the church of Copacabana de Andamarca (Bolivia)
topic_facet Brochantite
Colonial art
Gas chromatography-mass spectrometry
Raman and IR spectroscopy
SEM-EDS
Wall painting
description The Andean church of Our Lady of Copacabana de Andamarca in Bolivia was built in 1723. Its walls are made of adobe bricks and are decorated with paintings dated from mid 18th century. Before a restoration process involving the governments of Bolivia and the Federal Republic of Germany, seven microsamples were extracted from representative colors of one of the wall paintings inside the church. The aim of our research was to characterize the chromatic palette and investigate the painting technique of this Andean colonial wall painting. To approach these goals, an integrated investigation comprising Raman and FTIR-ATR spectroscopy, optical microscopy (OM), scanning electron microscopy with X-ray microanalysis (SEM-EDS), gas chromatography (GC), and gas chromatography mass spectrometry (GC-MS) was carried out.The results indicated the use of a mixture of two basic copper sulfates of mineral origin, brochantite and antlerite, as the green pigment, adding relevant information to the palette of green pigments in colonial art. Yellow, orange and red ochre, abundant pigments in the Andean region, were also characterized. Observation by optical microscopy of cross-sections of the embedded microsamples and analysis of organic binders by GC and GC-MS pointed to a secco technique and the use of a mixture of egg and vegetable oil ("tempera grassa") as the pigment binder.In conclusion, our results allowed to establish the pigment palette and offered new insights into the painting technique of Andean wall paintings. © 2016 .
author Tomasini, Eugenia Paula
Maier, Marta Silvia
author_facet Tomasini, Eugenia Paula
Maier, Marta Silvia
author_sort Tomasini, Eugenia Paula
title A multi-analytical investigation of the materials and painting technique of a wall painting from the church of Copacabana de Andamarca (Bolivia)
title_short A multi-analytical investigation of the materials and painting technique of a wall painting from the church of Copacabana de Andamarca (Bolivia)
title_full A multi-analytical investigation of the materials and painting technique of a wall painting from the church of Copacabana de Andamarca (Bolivia)
title_fullStr A multi-analytical investigation of the materials and painting technique of a wall painting from the church of Copacabana de Andamarca (Bolivia)
title_full_unstemmed A multi-analytical investigation of the materials and painting technique of a wall painting from the church of Copacabana de Andamarca (Bolivia)
title_sort multi-analytical investigation of the materials and painting technique of a wall painting from the church of copacabana de andamarca (bolivia)
publishDate 2016
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0026265X_v128_n_p172_Tomasini
http://hdl.handle.net/20.500.12110/paper_0026265X_v128_n_p172_Tomasini
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