La spettroscopia di riflettanza UV-visibile con fibre ottiche: luci ed ombre nell'indagine di manoscritti illuminati

UV-visible spectroscopy in diffuse reflectance mode is a simple and fast technique that can be applied advantageously in the characterisation of pictorial artworks, above all in situations in which the range of pigments and dyes be limited by age, geographical zone and painting technique. It is particularly useful in application with optic fibres in the configuration known as FORS (Fibre Optic Reflectance Spectroscopy). Despite of some clear disadvantages, first of all relative difficulty in interpretation of spectra from mixtures and from dyes, FORS can be proposed as technique of preliminary investigation in the analysis of miniatures on manuscripts, a situation in which fastness of analysis and non invasivity are very important features.