Archaeometric Study of Pictorial Stratigraphies from a Togatus Roman Sculpture found in Salamanca (Spain)

  1. Souto, Jorge 1
  2. Pinto, Javier 1
  3. Carmelo Prieto, Ángel 1
  4. Barrera, Mercedes 2
  5. Carlos Jiménez, Manuel
  6. Salinas, Alma 3
  1. 1 Universidad de Valladolid
    info

    Universidad de Valladolid

    Valladolid, España

    ROR https://ror.org/01fvbaw18

  2. 2 Centro de Conservación y Restauración de Bienes Culturales-Junta de Castilla y León
  3. 3 Museo de Salamanca
Revista:
Zephyrus: Revista de prehistoria y arqueología

ISSN: 0514-7336

Año de publicación: 2021

Número: 88

Páginas: 193-207

Tipo: Artículo

DOI: 10.14201/ZEPHYRUS202188193207 DIALNET GOOGLE SCHOLAR lock_openAcceso abierto editor

Otras publicaciones en: Zephyrus: Revista de prehistoria y arqueología

Resumen

La decoración de una escultura de togado romana encontrada en Salamanca en 2015 ha sido examinada con el objeto de identificar los pigmentos utilizados. Para ello se ha empleado microscopía electrónica de barrido –ESEM– equipada con un analizador de espectroscopía de rayos X por dispersión de energía –ESEM-EDX– y espectroscopía Raman –RS– en modo microscópico. El análisis mediante ESEM-EDX permitió establecer la composición química elemental de las muestras; determinar la concentración y la distribución de cada elemento en diferentes áreas y secciones transversales, y obtener perfiles de concentración predefinidos en el estrato pictórico. Las fases iónicas o moleculares de los componentes presentes en los materiales pictóricos fueron identificadas mediante espectroscopía Raman. En consecuencia, los pigmentos que conforman la paleta pictórica de esta obra de arte, como los óxidos de hierro y el negro de humo, han podido ser confirmados mediante la complementariedad de ambas técnicas. Adicionalmente, el sustrato estructural y la naturaleza química de los dispersantes/imprimadores de los colorantes fueron caracterizados, obteniéndose evidencias de la presencia de sílice y aluminosilicatos combinados tanto con los óxidos de hierro como con el negro de humo.

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