FAST AND NON-INVASIVE IDENTIFICATION OF BINDING MEDIA IN EASEL PAINTINGS BY A PORTABLE HYPERSPECTRAL SENSOR

  • Cong Wang
  • Sandro Moretti
  • Mara Camaiti

Resumo

A portable hyperspectral sensor collects reflectance spectra in the 350-2500 nm range, allowing the identification of not only inorganic but also organic materials. In this paper, a non-invasive and non-destructive characterization of pictorial binders was used. The results show that their main spectral differences are located between 1200-2400 nm. It is also indicated that when a binder is mixed with colorants, some modifications occur in respect to its original spectrum. In addition, the first derivative transformation of original spectra allows an easier identification of these organic binders, where the most discriminating regions are 1160-1250 nm and 1660-1800 nm.

Biografias do Autor

Cong Wang

Is a Ph.D. candidate at the Department of Earth Sciences - University of Florence, Italy. She got her master degree in Science for Conservation and Restoration of Cultural Heritage at the University of Bologna, Italy. Her main researches focus on the non-invasive characterization for painting surfaces and the monitoring of painted surfaces during cleaning processes.

Sandro Moretti

Is Full Professor in Engineering Geomorphology at the University of Florence - Italy. His main research activity is dealing with Geomorphology and Photointerpretation, mainly related to soil erosion and analysis, mass movement and fluvial geomorphology, hydrological modelling and geo-archaeological investigation for hazard and risk analyses. He is responsible for several national and international research projects, and member of the Scientific Council of the Institute of Geo-hydrological Disaster Prevention in Southern Italy.

Mara Camaiti

Is Researcher at CNR – Institute of Geosciences and Earth Resources in Florence – Italy. Her main research activity is focused on synthesis, characterization and testing of new polymeric materials for stone conservation, as well as on chemical and physical characterization of porous substrates and historical/artistic surfaces by non-invasive and non-destructive systems (NMR and hyperspectral devices). She is responsible for some national and international research projects concerning the conservation of cultural heritage.

Publicado
2019-11-12