Non-invasive micro-Raman and SERS analysis of dyes and colorants used in paper-based cultural and historical artifacts: There is no black like black. (atRAM@Nt)

The main objective of the project is the effective use and development of SERS techniques in the characterization, detection and identification of dyes and colorants found in ferrogallic inks typical of various historical and cultural artifacts. Although SERS represents an important technique for the detection and identification of organic dyes and pigments, its routine application to the analysis of various works of art is still a major challenge. Ferrogallic inks (FGIs)are probably the most important and commonly used writing and drawing media since antiquity. While some artefacts showing the presence of ŻgA are found in excellent conditions, others show discolouration and even corrosion of writing and records, sometimes leading to their complete degradation. The research of the project will focus primarily on the characterisation of the different ŽgA prepared in the laboratory and used for the preparation of reference samples, as well as on their detection and identification in real art objects and the evaluation of the observed degradation.