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Dear botanists, I am an archaeologist and am involved in wood and charcoal research in the Netherlands. Regularly I come upon the phenomenon in charcoal, that the cell walls of the wood seem to have melted and the cell structure has disappeared . These charcoal fragments have a metallic shine, are very hard and difficult to break. It often seems to occur in bark fragments first. Does any of you recognize this and does anyone have an idea what causes this or where I can find references to this phenomenon. Thanks a lot and greetings from Pauline van Rijn BIAX Consult Onderzoeksbureau voor Biologische Archeologie en Landschapsreconstructie Hogendijk 134 1506 AL Zaandam tel. 075 616 10 10 fax: 075 614 99 80 E-mail [log in to unmask]