Achaeometrical Research in Hungary II., 1988
BIBLIOGRAPHY - SUMMARIES - ANALYSES
The investigations gave information on the crystalline phases of the groundmass of the amphorae. Quartz, K-feldspar, plagioclase, mica, calcite, pyroxene and gypsum were found in main or significant quantity. The analytical Results are listed according to Dressel types and workshops. Groups were outlined on the basis of the presence and the ratio of some mineral components. The mineralogical composition of the samples (presence of primary calcite etc.) generally suggested a relatively low firing temperature. GLASS Mester, E., Szabó I.: Glass finds of the chapel and the NW palace = In Visegrád Régészeti Monográfiái 1. A visegrádi palota kápolnája és északkeleti épülete, Visegrád (1994) 183-210. Mester, E., Szabó I.: Research and material testing of archaeological glass finds in Hungary = Proceedings of the XVII International Congress on Glass. Vol. 6. Chinese Ceramic Society, Beijing (1995) 525-530. The medieval glass finds from Visegrád were determined and reconstructed with the help of a computer software developed especially for This purpose. After This Research it may be said that a sharp duality of quality and form may be observed in These glass vessels. In the second half of the 14th and first half of the 15th century imported goods of high quality formed the majority. In addition to These, simply designed, poorer quality imitations also occurred. From the second half of the 15 th century onwards, completely individually shaped local products prevailed aside from the still existing imports. During the 16 th-17 th centuries, markets were dominated by These local products of continuously improving quality. Venetian glassware of determining importance among the imported goods, German and Bohemian types of glass seldom occurred in Visegrád. Following various scientific analyses, we have arrived to the conclusion that the resistance of glass against outside environmental agents is primarily determined by the ratio of its elementary substances, pollution and the manufacturing technique used at the time of production. On the basis of different elementary substances found in each glass producing region, different types of glass and workshops can be reconstructed. From the weathered forms of glass fragments we tried to draw Conclusions concerning the mode of manufacturing and the reasons for chemical changes that occurred. Mester, E., Gróf P., Gróh D., Szabó I.: Medieval glasses = In Visegrád Régészeti Monográfiái 1. A visegrádi palota kápolnája és északkeleti épülete, Visegrád (1994) Generally speaking, a pronounced duality in quality and shaping is visible on the glass vessels excavated in the palace and in the castle of Visegrád. Imported goods of high quality were most frequent in the second half of the 14 th and first half of the 15 th century: Venetian small prunted goblets, bowls, and double conical flasks. The merchants of that Age brought glassware on the market in complete sets, as is shown by a great number of fragments found near the Roman Catholic church of Visegrád. Imitations of fine imported vessels used in royal services soon appeared on the market but were of poorer quality and craftmanship. 289
