Benjamin Bartl

Benjamin Bartl
National Archives, Prague, Czech Republic · Preservation Department

Ph.D.

About

11
Publications
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59
Citations

Publications

Publications (11)
Article
Thirteen samples of an efflorescence collected from the surface of beeswax seals or from beeswax used for their restoration were analysed in detail. The samples were of different origin, age and storage history. The composition and the incidence of the efflorescence was correlated with a chemical composition of historical and recent beeswax samples...
Article
This study focuses on the changes in properties of cellulose-based paper, which can take place as a consequence of its contamination by dust particles. The PM1 (fine) and PM10 (coarse) fractions of the dust particles from archival repositories were collected on cellulose filters Whatman 41, polytetrafluorethylene, and quartz filters. The latter two...
Article
The term 'wax bloom' is used to describe a thin whitish crystalline layer that develops on the surface of beeswax objects under specific conditions. This phenomenon is undesirable, especially in the cases of objects with aesthetic or informational value, such as wax sculptures or historical seals. A combination of solid-state NMR and FTIR measureme...
Article
Mechanical properties of aged beeswax were studied by an indirect measurement, using hydrogenated beeswax as a model material. The adequacy of the model was evaluated by comparison of its chemical composition and thermal properties with those of samples of historical beeswax. It was found that the gradual decrease in content of unsaturated compound...
Article
Full-text available
When treating historical beeswax seals, it seems a natural choice to use materials as similar to the original as possible. The properties of analogous recent materials, however, differ from those of the aged ones, not to mention the fact that the exact composition of the particular sealing wax is usually uncertain. In order to obtain the material o...
Method
Full-text available
Velké množství historických voskových pečetí se dochovalo ve fragmentovaném stavu, což souvisí se zvýšením tvrdosti a křehkosti, kterému pečetní vosky v průběhu přirozeného stárnutí podléhají. Bezprostřední příčinou mechanických poškození pak bývá neopatrná manipulace nebo nevhodný způsob uložení archiválií. V této metodice jsou porovnány vlastnos...
Method
Full-text available
Certifikovaná metodika nabízí alternativu k obvyklé metodě spojování fragmentů voskových pečetí pomocí svařování. Pro tento účel doporučuje použití vhodného adheziva, konkrétně roztoku poly(2-ethyl-2-oxazolinu). Jedná se o univerzální metodu spojování fragmentů pečetí, k jejímž výhodám patří jednoduchá aplikace, šetrnost vůči původnímu materiálu, n...
Article
Historical beeswax seals are unique cultural heritage objects. Unfortunately, a number of historical sealing waxes show a porous structure, with a strong tendency to stratification and embrittlement, which makes these objects extremely prone to mechanical damage. The understanding of beeswax degradation processes therefore plays an important role i...
Article
State-of-the-art hybrid pixel semiconductor detectors provide excellent imaging properties such as unlimited dynamic range, high spatial resolution, high frame rate and energy sensitivity. Nevertheless, a limitation in the use of these devices for imaging has been the small sensitive area of a few square centimetres. In the field of microtomography...
Article
The surface of beeswax seals shows a tendency to become covered with a white crystallic layer, composed mainly of unsaturated hydrocarbons. In order to obtain deeper insight into the nature of this adverse phenomenon, the thermal properties of the efflorescence and the pseudobinary mixtures efflorescence/beeswax were studied employing DSC and FTIR...
Article
α-Amylases are enzymes employed in paper conservation to remove starch-based adhesives. However, the success of their application can be limited by the transport rate of the enzyme molecules through the paper pores to the substrate. This investigation was focused to monitoring the rate of penetration of the enzyme into hand-made paper and various m...

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