D. Omelchenko. Webinar “Coloured Inscriptions and Analytical Techniques” (Hamburg, 19 October 2021). Review of reports // Petersburg Historical Journal, no. 4, 2022, pp. 174–183
This article gives an overview of five papers read by participants in an international webinar held at The Centre for the Study of Manuscript Cultures (Hamburg) on October 19, 2021. The webinar was devoted to a study of paints made from mineral pigments and preserved in historical monuments. Employees of scientific institutes from Italy, France and Great Britain shared their experience in studying historical monuments with the help of modern non-invasive technologies. Various types of historical monuments were taken as examples: rock art, Egyptian tombs, miniatures of handwritten books, frescoes, Chinese vases, stained glass, and graffiti. Most of the presenters considered X-ray fluorescence analysis (XRF), Raman spectroscopy and Fourier-transform spectroscopy. One presentation was devoted to the results of applying the latest technology — Micro-Spatially Offset Raman Spectroscopy — to the study of works of art. Chemical characteristics of pigments used since ancient times (ochre, cinnabar, azurite and lapis lazuli) were given and the ways of their degradation were discussed. The webinar paid special attention to studies of blue pigment in such variants as Egyptian Blue, Han Blue, azurite, and lapis lazuli. The results of experiments to make blue pigments based on historical recipes were presented. Practical advice from the participants was an important component of the webinar. For example, one of the presenters shared a classification of methods he had developed that could be used to identify paint technologies on the surface of objects. To another speaker, years of experience in illumination research allowed him to conclude what types of mobile devices are suitable for this specific object, and what their technical characteristics should be.
historical monuments, mineral pigments, non-invasive technologies of research, X-ray fluorescence analysis, Raman spectroscopy, Fourier-transform spectroscopy.
Omelchenko, Darya — Cand. of Sci (History), Researcher, Laboratory for Comprehensive Research of Manuscript Monuments, St. Petersburg Institute of History, Russian Academy of Sciences.