Achaeometrical Research in Hungary II., 1988

BIBLIOGRAPHY - SUMMARIES - ANALYSES

The corrosion products on their surface are usually similar to those covering other metal objects, but sometimes the deterioration of the metal, or the appearance of the corrosion layers, the morphology of the corrosion products can be quite different. The reddish silver sulphide layer on metal threads made of electrum, the black, 'flowerlike' silver sulphide crystals growing on some metallic decorations, the lamellar detachment of corroded silver layers, and the difference in the appearance of silver chloride layers depending on the environmental conditions are phenomena which have been little investigated up to now. Because of the small dimensions, structure and the nearness of organic materials, the conservation of the metals in connection with textiles usually requires different considerations to those taken in the case of other metal objects. Járó M.: Quick determination of the manufacturing technique of metal threads on museum textiles before treatment and review of the methods used for their cleaning = Abegg-Ehemaligen-Preprints, Abegg Stiftung, Bern (19..) in print. Conservation of textiles with metal threads, first of all their cleaning, causes special problems to textile conservators. Mechanical and chemical cleaning methods are usually damaging not only to the multi layered metal strip or wire used as metal thread in most of cases, but also to the fibrous core of the metal thread, if there is any, to the organic support of the metal thread, ifit is for example a gilt leather strip and also to the fibres of the surrounding textile. Before any treatment, the manufacturing technique of the metal thread (morphology and materials) and the state of preservation of the thread should be investigated thoroughly. Classification of the metal threads in different morphological groups, metals and organic materials used to make them, corrosion of the metals used, a quick method for the determination of the manufacturing technique before treatment and the conveniences and inconveniences of the mechanical and chemical methods disposable for the removal of the dirt and corrosion products from the surface of metal threads are described in the contribution Költő L.: A Vörs-kerékerdői langobard fibula analízise (Analysis of the Langobard fibula from Vörs-Kerékerdő) = Somogyi Múzeumok Közleményei 10 (1994) 30-33. The composition of elements was determined in This Langobard silver fibula, and the use of the so-called fire gilding was established. Költő L.: A török réz edények anyagvizsgálatának eredményei (Results of material studies on Turkish copper vessels) = In G. Hatházi, Gy. Kovács eds.: A váli gótikus templomtorony (The Gotic Church Tower in Vál, Data to the 14 -17 history of Vál). Székesfehérvár (1996) 58-59. Thirteen measurements were taken on each of seven Turkish Period objects with the aims of data gathering. In This alloy, low proportions of additives (Sn 1-7 %, Sb 1-5 %) were observed. Copper contents ranged between 90-96 %. 304