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PRESERVATION OF WALLPAPERS AS PARTS OF INTERIORS

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Preservation of wallpaper as a part of interiors<br />

selecting the one which triggers the least visual attention, taking<br />

into account the composition of the wallpaper and the location<br />

of the lacunae on that wallpaper. 392<br />

Before treating large areas, it is necessary to do a test-patch.<br />

It is also important to keep in mind that retouching involves the<br />

colouring of lining-paper, which does not have entirely the same<br />

characteristics as the original. A filling-paper may absorb paint<br />

more than the original, and its surface may have a slightly different<br />

texture and shine. In the case of the Chinese wallpapers from<br />

the Esterházy Palace, large losses that needed to be retouched<br />

were covered with two layers of lining, first a layer of short-fibred<br />

silk tissue paper 393 and then a Japanese paper. 394 The short-fibred<br />

silk tissue had similar properties to the original material and provided<br />

conservators with an even surface for retouching. Retouching<br />

can usually be carried out by using watercolours, gouache,<br />

crayons and dry pastels. Opaque colours, such as gouache, are<br />

used for opacity and texture. They are preferred because the<br />

desired tone can be built up to allow for gradual adjustment of<br />

value, hue and intensity. 395 Acrylic paints are not recommended<br />

since they are irreversible and lack versatility. 396<br />

Retouching is not used only to fill in lacunae, but also to<br />

hide darker areas which break the visual unity of an object and<br />

cannot be reduced by a conservation treatment. Such damages<br />

include dark tide-lines, areas discoloured by mould, non-removable<br />

splashes of paint, adhesive and over-paintings. McClintock<br />

has described a technique of opaque glazing which implements<br />

the hiding power of watercolours mixed with titan white pigment<br />

or ground pastels. Since the glazing will cover not only<br />

the lacunae, but especially the original surface, it is highly recommended<br />

to use the technique of opaque glazing for limited<br />

cosmetic treatment. 397<br />

392<br />

Murray and Vazquez, “Lacuna Restoration: How to Choose a Neutral Colour?”,<br />

http://www.create.uwe.ac.uk/norway_paperlist/murray.pdf.<br />

393<br />

KLUG Conservator, Silk tissue on reels – without buffer, accessed December 8, 2012,<br />

http://www.klug-conservation.com/?site=produkte&id=532.<br />

394<br />

Kozo paper, 30 g/m 2 .<br />

395<br />

McClintock, “Compensating for Losses in Historic Wallpapers”, 151.<br />

396<br />

Ibidem.<br />

397<br />

Ibidem.<br />

213

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