Chemical Characterization of Waterlogged Charred Wood: The Case of a Medieval Shipwreck

In 2008, a medieval wooden shipwreck was discovered at the port of Rhodes, Greece. The party burned, presenting challenge for conservators, as uncharred, semi-charred and charred waterlogged wood were often encountered on same piece timber. seeking most appropriate conservation method this unusual material, its chemical characterization considered necessary. This study examined chemistry three dominant conditions found in wreck. Fourier transform infrared spectroscopy X-ray diffraction analysis implemented comparison to reference samples. Energy dispersive also used assessing inorganic composition each condition. Moreover, wood, proximate undertaken. Results obtained regarding organic moieties archaeological demonstrated that samples chemically comparable charcoals, material showed similarity thermally modified whereas uncharred proven have an analogous biodeteriorated wood. Elemental results diversified among shipwreck’s conditions. Sulfur, iron, oxygen decreased areas, carbon increased. Proximate ash fixed content increased with charring, volatile mater decreased. work proved major differences timbers’ owing different degree charring. These are anticipated influence not only methods’ efficacy, but post-treatment behavior material. Further investigation is needed correlating physical properties order contribute practical aspects conservation.