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Odkwaszanie akwarel i pasteli

100%
Sobucki W., Macander-Majkowska G., Kurkowska J., Królikowska-Pataraja K.
Ochrona Zabytków
|
2013
|
issue 1-4
113-120
EN
In the process of preservation of paper artifacts, such as watercolour, gouache or pastel, the usage of water and other solvents is generally avoided. This represents a significant obstacle, which specifically relates to the elimination of acidic paper substrate. The article presents the outcome of our research on the use of Bookkeeper’s deacidification method to preserve this type of objects. Perfluoroheptane organic liquid, which is neutral to inks, dyes and other substances that are sensitive to water and other solvents, is used as a carrier in the deacidification substance – magnesium oxide. It does not cause physical changes in the paper, typical for water treatment – cut and deformed sheets. The article shows the results obtained during the deacidification of eight watercolours and three pastels. The tests, which were continued as the basis previous studies, during which the impact of this method of deacidification on the colour stability of a model watercolour painting was examined, were prepared for two types of securities. The researches came to the conclusion expressed in the article that Bookkeeper deacidification method carried out on the verso is completely safe for the objects and does not cause significant changes in the layer of paint colours.
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PROBLEMATYKA OCHRONY ZBIORÓW Z XIX I XX W. O PODŁOŻU Z PAPIERU

63%
Sobucki W.
Ochrona Zabytków
|
2008
|
issue 3
65-74
EN
The nineteenth century witnessed profound transformations in the technology of paper production; consequently, paper lost its age-resistance and books, periodicals and documents from that period onwards represent, as a rule, an unsatisfactory state. A mass–scale deacidification - the only known way of limiting losses in collections from the two centuries - was inaugurated in Poland thanks to the Government 'Acid paper' Programme, realized in 2000-2008. Books and other prints are treated with the Bookkeeper method applied at the National Library in Warsaw and the Jagiellonian Library in Krakow, while sheet documents are treated with the Neschen method in the two above-mentioned libraries and in four archives: in Warsaw, Katowice, Gdynia and Milanówek near Warsaw. Furthermore, statistical research conducted as part of the programme established that in Poland at least 43 mln books and 200 kms of acts must be deacidified, which, on a national's calve, comprises about 94% of library and archive resources from the last two centuries. The optimistic aspect of the issue lies in the fact that the publication of books with non-acid paper was inaugurated in Poland at the end of the last century; this means that the number of library resources threatened with acid hydrolysis is not growing. The article also analyses studies relating to the state of preservation of nineteenth and twentieth-century collections with a paper base.
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