Identification of carbon-based black pigments in four South American polychrome wooden sculptures by Raman microscopy

Introduction: Carbon-based pigments are a group of dark-colored materials, which are classified according to the starting material used and their manufacturing process. Raman spectroscopy is an ideal technique for the identification of carbonaceous matter. Carbon-based pigments show broad bands betw...

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Autores principales:	Tomasini, E.P., Gómez, B., Halac, E.B., Reinoso, M., Di Liscia, E.J., Siracusano, G., Maier, M.S.
Formato:	JOUR
Materias:	Carbon-based pigments Colonial art FT-IR Polychrome sculpture Raman microscopy SEM-EDS
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_20507445_v3_n1_p_Tomasini
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

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spelling	todo:paper_20507445_v3_n1_p_Tomasini2023-10-03T16:38:47Z Identification of carbon-based black pigments in four South American polychrome wooden sculptures by Raman microscopy Tomasini, E.P. Gómez, B. Halac, E.B. Reinoso, M. Di Liscia, E.J. Siracusano, G. Maier, M.S. Carbon-based pigments Colonial art FT-IR Polychrome sculpture Raman microscopy SEM-EDS Introduction: Carbon-based pigments are a group of dark-colored materials, which are classified according to the starting material used and their manufacturing process. Raman spectroscopy is an ideal technique for the identification of carbonaceous matter. Carbon-based pigments show broad bands between 1,300 and 1,600 cm-1 but they differ in position, width and relative intensity, allowing discrimination between them. The aim of the present study was the identification of carbon-based pigments in four polychrome wooden sculptures from the Jesuit Mission La Trinidad in Paraguay. Results: Analysis of the Raman spectral parameters of the polychrome samples and comparison with those of carbon-based pigment references allowed the identification of wood charcoal, lampblack, bistre and a black earth pigment. Complementary analysis by infrared spectroscopy and elemental analysis supported the assignments. Conclusions: In this study we have provided new evidence that Raman microscopy is a powerful technique for the discrimination of carbon-based pigments in works of art. This is the first time that bistre, lampblack and a black earth pigment are identified in colonial art. The chemical information obtained on the black pigments contributed to increase our knowledge on available resources and technology used in the manufacture of the polychrome sculptures at the Jesuit Mission. This information is relevant for our studies on Colonial art. © 2015 Tomasini et al. Fil:Tomasini, E.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Reinoso, M. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_20507445_v3_n1_p_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	Carbon-based pigments Colonial art FT-IR Polychrome sculpture Raman microscopy SEM-EDS
spellingShingle	Carbon-based pigments Colonial art FT-IR Polychrome sculpture Raman microscopy SEM-EDS Tomasini, E.P. Gómez, B. Halac, E.B. Reinoso, M. Di Liscia, E.J. Siracusano, G. Maier, M.S. Identification of carbon-based black pigments in four South American polychrome wooden sculptures by Raman microscopy
topic_facet	Carbon-based pigments Colonial art FT-IR Polychrome sculpture Raman microscopy SEM-EDS
description	Introduction: Carbon-based pigments are a group of dark-colored materials, which are classified according to the starting material used and their manufacturing process. Raman spectroscopy is an ideal technique for the identification of carbonaceous matter. Carbon-based pigments show broad bands between 1,300 and 1,600 cm-1 but they differ in position, width and relative intensity, allowing discrimination between them. The aim of the present study was the identification of carbon-based pigments in four polychrome wooden sculptures from the Jesuit Mission La Trinidad in Paraguay. Results: Analysis of the Raman spectral parameters of the polychrome samples and comparison with those of carbon-based pigment references allowed the identification of wood charcoal, lampblack, bistre and a black earth pigment. Complementary analysis by infrared spectroscopy and elemental analysis supported the assignments. Conclusions: In this study we have provided new evidence that Raman microscopy is a powerful technique for the discrimination of carbon-based pigments in works of art. This is the first time that bistre, lampblack and a black earth pigment are identified in colonial art. The chemical information obtained on the black pigments contributed to increase our knowledge on available resources and technology used in the manufacture of the polychrome sculptures at the Jesuit Mission. This information is relevant for our studies on Colonial art. © 2015 Tomasini et al.
format	JOUR
author	Tomasini, E.P. Gómez, B. Halac, E.B. Reinoso, M. Di Liscia, E.J. Siracusano, G. Maier, M.S.
author_facet	Tomasini, E.P. Gómez, B. Halac, E.B. Reinoso, M. Di Liscia, E.J. Siracusano, G. Maier, M.S.
author_sort	Tomasini, E.P.
title	Identification of carbon-based black pigments in four South American polychrome wooden sculptures by Raman microscopy
title_short	Identification of carbon-based black pigments in four South American polychrome wooden sculptures by Raman microscopy
title_full	Identification of carbon-based black pigments in four South American polychrome wooden sculptures by Raman microscopy
title_fullStr	Identification of carbon-based black pigments in four South American polychrome wooden sculptures by Raman microscopy
title_full_unstemmed	Identification of carbon-based black pigments in four South American polychrome wooden sculptures by Raman microscopy
title_sort	identification of carbon-based black pigments in four south american polychrome wooden sculptures by raman microscopy
url	http://hdl.handle.net/20.500.12110/paper_20507445_v3_n1_p_Tomasini
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_version_	1782024608908574720

Identification of carbon-based black pigments in four South American polychrome wooden sculptures by Raman microscopy

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