Achaeometrical Research in Hungary II., 1988

BIBLIOGRAPHY - SUMMARIES - ANALYSES

Járó M., Tóth A. L.: Possibilities of reconstruction of metal coating techniques used for solid metal strips or wires in museum textiles = In Proceedings of the 4th International Conference on Non-Destructive Testing of Works of Art, Berlin (1994) 544-553. Metal threads have been used in textile decoration for several thousand years. The manufacturing technique of These threads made of solid metal strip, wire or from metal coated organic material changed a lot during This long period. Solid strips or wires were first made of gold or silver, but by the end of mediaeval times, gold was replaced by gilt silver, gilt copper or brass, and silver by silvered copper. Gilding and silvering techniques had also changed with time. Measuring the concentration of the different elements present in the metal - step by step in the cross-section of the strip or wire -, the concentration profiles of the different elements could be traced, and showed on the same diagram. Studying These diagrams it was possible, in most of cases, to distinguish the different metal coating techniques described in the contemporary written sources, e.g. gilding with gold leaves, double metal coating (silver and gold) on copper, brass coating on copper. In some cases, the hypothesis of metal coating methods, up to now not known in This field, could be set up, e.g. coating a copper wire with brass leaves. Energy dispersive X-ray microanalysis (EDX) was used for the measurements. Járó M., Tóth A. L.: Mode de fabrication des fils métalliques provenant des fouilles en Hongrie = In La conservation des textiles anciens, Volume des contributions des Journées d'Études de la SF/IC, Angers (1994) 157-167. Scientific examination of metal thread coining from different excavations in Hungary revealed a greater variety of metal threads than expected. In addition to the commonly used metal threads made of gilt silver, copper was found as base metal of the threads, covered with silver or brass. Brass strips and wires and hollow, slightly flattened copper tubes were also used as metal threads. The thick layer of corrosion products made rather difficult the identification of the materials used. Járó M: Manufacturing technique of gold threads and their imitations on museum textiles - chronology of the preparation of metal threads. Results of the scientific investigations = In Yearbook of the Textilmuseum (Budapest) 8. (Special issue), Textil- és Textilruházati Ipartörténeti Múzeumi Alapítvány, Budapest (1995) 31-51. On the basis of contemporary written sources and scientific Investigation data, it was possible to describe the manufacturing technique of the different metal threads used in Europe and modify the chronology of metal thread making. Járó M., Tóth A. L.: Deterioration of metal treads and other metallic decorations made of gold, silver or gilt silver on museum textiles. Problems of their conservation = In Metal \5, Textbook of the conference, Semur (1995) in print. Metal threads and other decorations on textiles made of metal can usually be considered as very thin, multilayered metal objects. 303