By C. Wayne Smith
В этой работе, автор описывает ряд методов, которые были использованы им и его коллегами при столкновении с проблемой консервации мелких органических фрагментов – древесины, кожи, продуктов питания и т.п., возникшей во время расчистки останков парусника "La Belle", затонувшего у берегов Техаса в 1686 г., и пролежавшего в иле более трехсот лет.Образцы сканов:
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Additional resources for Archaeological Conservation Using Polymers
The results of Passivation Polymer treatment of wooden buttons, with and without associated threads, have been very successful. % shrinkage of overall size. The associated threads have retained their color, yarn memory, ﬂexibility, texture, and some elasticity. Over time, the artifacts have shown no change in their original posttreatment appearance or condition. Dry-Site Artifacts—Dry and Desiccated Wood This procedure deals with weathered wood and architectural materials, and with organic artifacts from dry cave sites.
Graduated cylinder setup for reprocessing of PEG-treated wood using CR-: (A) vented warming oven; (B) loose-ﬁtting aluminum cap; (C) level of CR- in cylinder; (D) CR- solution in which TD was immersed; (E) TD immersed in CR-. to temperatures. When immersed in warm CR-, PEG melts. Because it is not chemically bound to the cell walls of the wood, it migrates. This is the same reaction that would be observed if the PEG-treated wood were placed into warm water. Of interest, then, is the chemical reactivity of CR- within the cell structure of the wood.
Diﬀerences in bulking potentials, then, lie in the heightened levels of volatile gases that result in cold process, vacuum assisted alcohol-acetone dehydration. includes the out-gassing data for all ﬁve samples. The data suggest that the rise in molecular acetone and methyl levels resulting from multiple-solvent dehydration makes two-stage cold dehydration potentially more appropriate for silicone bulking. CHAPTER 3 21 Archaeological Wood O ne of the biggest problems conserva tors may encounter when developing a conservation strategy for waterlogged wood is determining the degree of deterioration that has occurred within the matrix of the artifact.