Application of microscopic imaging, multispectral techniques, and SEM/EDS analysis to the study of 19th century colour engravings

This study was carried out on a collection of coloured gravures, which are bound in one book volume entitled “Histoire Naturelle des Perroquets”. This book belongs to the Benaki's Collection of the Hellenic Parliament Library, Athens, Greece. Each page has a coloured print, depicting a different bird species. In most cases, the prints present oxidations caused by the additives used in paper and printing inks manufacture, i.e. fillers, sizing agents, binders, solvents, and other chemical compounds.

By employing microscopic imaging, multispectral imaging, and Scanning Electron Microscopy/Energy Dispersive X-ray spectroscopy (SEM/EDS) analysis significant information on the materials used, engraving techniques, as well as the preservation state of the printings studied can be obtained. The combination of the proposed methods yields successful results in identifying the materials used in the colour inks, as well as the paper support of the printings.