Naršoma pagal Autorius "Giedraitienė, Birutė"

Rodoma 1 - 3 iš 3

Fondų saugojimo problemos
(2004) Giedraitienė, Birutė
Vandeniui neatsparių įrašų bei antspaudų išsaugojimas
(2006) Giedraitienė, Birutė
The article briefly surveys the history of ink and dyestuff which were used and are being used up till now in the manuscripts. The oldest and the most resistant ink (Tas it was proved with time) to the influence of time and environment was produced using soot of various origin. Later the ink has been made on the basis of gallic acid. The synthetic dyes were started to be used at the end of 19th century. They satisfied the requirements of consumers in obtaining ink of various colours but preserving, using and restoring the documents with such sort of ink, the problems appeared with conservation. The tests were carried out with three samples of contemporary ink in order to fix and preserve these samples by various means.
Vaško antspaudų sudėties tyrimai
(2009) Giedraitienė, Birutė
The article reports on an analysis of ten wax seals (with the shells) authenticating various documents of 1411–1783. The seals were chosen by the sphragistics expert Dr. Edmundas Rimša and the Head of the Manuscript Department of the Library of the Academy of Sciences Rima Cicėnienė. Analysed were the Great Seal of the Grand Duchy of Lithuania, the Small Seal of the Grand Duchy of Lithuania, the seals of the Grand Dukes of Lithuania Žygimantas Kęstutaitis and Kazimieras, of the Bishop of Vilnius Albertas Taboras, of the noble Jonas Skinderis, of the city of Kaunas. The methods of atomic absorption spectrometry (AAS) and atomic fluorescence spectrometry (AFS) were used to determine the heavy metals in the seals. The elemental composition of the seals and of their shells was analysed by the method of scanning electron microscopy and energy dispersive X-ray spectroscopy (SEM/EDS). In addition, organic structure units in the matter of the seals and their shells were specified by Fourier transform infrared spectroscopy (FTIR). The analysis was performed in the Environmental Research Department of the Environment Protection Agency under the Ministry of Environment of the Republic of Lithuania.