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Konserwacja renesansowych sgraffit z Zagrodna

100%

Stec M.

Ochrona Zabytków

1992

issue 3

127-138

In 1977 a method of transferring sgraffiti was proposed and an experimental, fully successful operation was executed. The effectiveness of the newly introduced method was confirmed by a large scale (33 sq. metres) transfer of a sgraffito from the south elevation of the manorhouse in Zagrodno. In 1567 all four elevations of the edifice and the free standing tower were covered with such sgraffiti. In the eighteenth century the manorhouse was expanded and the sgraffiti were covered with plaster. The considerable damage of the manorhouse and the collapse of the roofs and ceilings endangered also the valuable sgraffiti. It was decided, therefore, to transfer them onto a new base and to display them in the nearby Regional Museum in Chojnow. The state of the preservation and causes of the domage were thoroughly examined, and the results were of essential importance for selecting the technique and technology of the transfer. The sgraffito was disclosed under the plaster and structurally reinforced by numerous impregnations with limewater. A face composed of several layers of resins of polyoctane of vinyl and a single layer of cotton gauze were applied. This protection was sufficient for retaining the plasticity of the surface, while its transparency made it possible to assure permanent control during the d ifficult process of removing the sgraffito from the wall. Fragments of the sgraffito were treated on the underside, fixed and covered with putty together with two layers of cotton gauze. After the preparation of the intervention layer (styropian plates), the sgraffito was glued onto a specially made base, laminated with epidian. After the removal of the face, putty was placed in the gaps. A detailed study of the techniques and technology of the sgraffiti improved the knowledge about this type of wall decoration. The deiphering and examination of the sgraffiti from the point of view of their iconography (by J. Janus) make it possible to declare that they are a work of high artistic merit, and that the richness of their contents testifies to the sophisticated taste of the people who commissioned them. (translated by A. Rodzińska-Chojnowska)

Metoda przenoszenia sgraffit na przykładzie fragmentu sgraffita z Zagrodna

63%

Stec M.

Ochrona Zabytków

1982

issue 1-2

90-97

A vast number of sgraffitoes got destroyed due to a lack of the method to transfer them on a new base. Attempts were made to employ a distacco method, widely used to transfer paintings. However, this method appeared improper and unsuitable in the case of sgraffitoes. A fundamental problem lies in a rough texture of sgraffito and plasticity of its surface. An insulating layer and putty were introduced for facing. The use of an insulating layer made it possible to remove safely protections, while putty guaranteed the maitaining of surface’s plasticity during the treatment. As it was necessary to introduce an insulating layer a difficulty had also to be overcome of tight bonding of a watersoluble adhesive with an adhesive soluble with organic solvents. It is generalny known that there is no adhesion between such adhesive agents. The method was tested on an original object by transferring a detail (167X112 cm) of a Renaissance sgraffito in Zagrodno, Legnica voivodship. The transfer made is 1,5 cm in width, which will allow its location in the original place and the levelling of the remaining sgraffitoes with the surface. Because a photogrametric method registering in three dimensions is not suitable for sgraffitoes for technical reasons, the method of documenting sgraffitoes was also discussed. Silicon resin was used for that purpose, with a cast of sgraffito and then an X-ray photo recording three dimensions being prepared. To document uneven creased surface a technique of the allocation of isobates, used in cartography, was employed. This alllows to draw contour lines informing of irregularities in relation to the even surface. The said method ensures a safe transfer of sgraffitoes. It may also be applied to transfer reliefs, uneven plasters and stucco works. When working this technique out, the simplest, generally available conservation materials were taken into account.

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2 Ochrona Zabytków

2 Stec M.

1 1992

1 1982

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Konserwacja renesansowych sgraffit z Zagrodna

Metoda przenoszenia sgraffit na przykładzie fragmentu sgraffita z Zagrodna