Full-text resources of CEJSH and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl

Results found: 2

first rewind previous Page / 1 next fast forward last

Search results

Search:
in the keywords:  VACUUM-DRYING
help Sort By:

help Limit search:
first rewind previous Page / 1 next fast forward last
1

CONSERVATION OF WATERLOGGED ARCHAEOLOGICAL WOOD WITH POLYETYLENE GLYCOL 4000 USING VACUUM DRYING IN LOW TEMPERATURE

100%
Grupa M., Plóciennik P., Zawadzka A.
Sprawozdania Archeologiczne
|
2009
|
vol. 61
381-406
EN
The article presents study with polyethylene glycol (PEG 4000) results with implementation of vacuum drying in low temperature. The works were performed by the 'Pracownia Konserwacji Zabytków Instytutu Archeologii' and 'Zaklad Fizyki Technicznej oraz Zastosowan Fizyki Instytutu Fizyki UMK' in Torun. During studies artifacts made of various kinds of wood were used: maple, hazel, birch, willow, linden, elm, oak, pine and spruce. The best and long lasing drying results are obtained in vacuum. The crucial matter is proper vacuum parametric selection for particular material and impregnants. Drying in vacuum has only advantages, first of all, time saving and avoiding microbiological danger - during vacuum drying that problem disappears completely. Applying PEG 4000 for wet archaeological wood we have possibility of substantial strengthening its structure, because we introduce from 50% to 70% of impregnant into the object. After treatment the wood is hard, dark but the most often its rings are clearly seen and has wax surface. The objects' shapes are usually preserved what is presented in photos. Cylindrical shapes do not deform.
2

A TEST ON CARRYING OUT RE-CONSERVATION OF LEATHER ARTIFACTS USING VACCUM DRYING TECHNIQUE IN LOW TEMPERATURES

86%
Drazkowska A., Grupa M.
Sprawozdania Archeologiczne
|
2009
|
vol. 61
407-417
EN
First re-conservation treatment of selected objects was carried out in 1996. To protect the footwear a composition consisting of glycerine with sterinole admixture was applied. In conservation history glycerine predominated for a long time; there were periods when it was given up and then conservators returned to it again. The most often 59% concentration of glycerine in water was used. That method protected artifacts from drying up, what prevented their shrinkage and deformation. However, during drying process water was not completely removed, which caused clear change in color, leading to objects' darkening. Although leather was flexible after that treatment, they could be bent and formed enabling reconstruction, they were sticky attracting dirt, which again was undesirable effect, particularly for objects exposed in museum display cases. Moreover high concentration of glycerine in the impregnant created microbiological threat. In the 90's of 20th century, when our chosen leather objects were conserved for the first time that method was one of few, thanks to which the artifacts had a chance to survive for many years. Today, however, when advance in science has made it possible to elaborate new methods, there is a possibility of performing next conservation treatment. The attempt was taken up to check if another impregnation process will improve flexibility properties of leather and whether it is generally possible.
first rewind previous Page / 1 next fast forward last
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.