Identification of colorant materials after an artificially aged process
- Ana López-Montes 1
- Anne-Laurence Dupont 2
- Natalia Tello Burgos 1
- Teresa Espejo 1
- Rosario Blanc 3
- 1 Facultad de Bellas Artes
- 2 Sorbonne Universités, Ministère de la Culture et de la Communication
- 3 Facultad de Ciencias
ISSN: 2171-8814
Ano de publicación: 2016
Volume: 49
Número: 3
Páxinas: 143-153
Tipo: Artigo
Outras publicacións en: Óptica pura y aplicada
Resumo
Chemical composition and physical characteristics of art materials (support, paint layer, protection layer…) depend on different factors such as their origin, the application process, the storage conditions throughout the centuries and the ageing processes. The identification of aged organic dyes can be difficult due to the possible changes that their physical and chemical characteristics could have undergone with time. A comparative study between standard samples and samples aged in a controlled climate chamber under drastic conditions of humidity, temperature and light was carried out. The techniques of identification and evaluation used were High Performance Liquid Chromatography (HPLC) and UV-visible spectroscopy. Results showed that the cellulosic fibers confer greater resistance to dyes in all cases.