Spectral database for postage stamps by means of FT-IR spectroscopy

摘要

The evolution of the connections between Art and Science have been continually developing over the last few years. These links have led to many scientific characterisation and analysis techniques becoming increasingly applied to study works of art and artefacts. Today's science and technology developments have led to many different approaches being used in the study of Cultural Heritage. New non-destruc-tive methodologies allow one to apply physical and chemical analysis methods to valuable objects. Fourier transform infrared (FT-IR) spectroscopy has become a particularly useful technique in this field for the characterisation of material composition; in particular, the use of the attenuated total reflection (ATR) sampling technique allows one to analyse a wide range and type of valuable objects without causing any damage to the samples. Capable of seeing beyond the careful eye of the restorer or of the art historian, the FT-IR/ ATR technique has been successfully employed in the material characterisation of many different samples coming from the world of art. The first systematic studies using spectroscopic investigations on stamps were performed using both the FT-IR and Raman spectroscopic techniques.1-5 The immediate and detailed response from this type of study has led to a large and very significant amount of data and-informa-, tion becoming available. Information which gives, not only an insight into the materials that compose a particular work of art, but also provide guidelines that supply further awareness important to conservative and restoration treatments. Discovering the ancient secrets of the artists and the real composition of art objects can be the key enlightening cases under study, which until that moment had been unresolved.