0000000000061776
AUTHOR
V. Ciaramitaro
Portable Spectroscopic Techniques for the Non-invasive Identification of two historical yellow pigments: Applications and Practical Challenges
Abstract Decades of technological advances in instrumental analysis have transformed many techniques from laboratory in portable analytical tools with increasing their applicability in situ to the study of cultural heritage. It is known that the painting realisation varies from artist to artist, and the identification of the pigments provides a decisive contribution to trace their authenticity and to support an appropriate restoration work. However, in some cases, due to the complexity of painting composition, it is difficult to distinguish between pigments having a similar chemical composition and colour. Here, a systematic study through combined use of portable non-invasive spectroscopic …
Laboratory of FORS and MO
In this laboratory activity, the Fiber Optic Reflectance Spectroscopy (FORS) and the Optical Microscopy (MO) techniques will be introduced. After a brief introduction about the theory, instrumentations and applications of both techniques, the students will see the application of the following equipment: -Digivision 1.3 megapixel USB digital optical microscope -Ocean Optics USB2000 + XR1 portable reflection UV-vis spectrophotometer with DH-mini UV-Vis-NIR source and reflection probe. The acquisition of MO images and of FORS spectra will be performed on pigments of some archeological ceramics, stones with and without a protective and on patina of metal alloys. The MO images of each artifacts …
A database for historical pigments through handheld instrumentation
Portable instrumentation is largely used in archaeometry for in-field measurements at museums and archaeological sites. The historic evolution of pigments is closely related to the technology developments in past cultures and provides relevant clues regarding their knowledge advancement. Here, a systematic study of 26 historical powdered pigments was carried out through a combined handheld instrumentation for X-ray Fluorescence. Chemical identification was carried out through a set of instrumentation produced by different manufacturers. Their performances are compared on the same set of samples to identify best practices for the study of historical pigments. A database of organic and inorga…