Marcinkowski, Wojciech [Hrsg.]; Zaucha, Tomasz [Hrsg.]; Museum Narodowe w Krakowie [Hrsg.]: Plaster casts of the works of art: history of collections, conservation, exhibition practice ; materials from the conference in the National Museum in Krakow, May 25, 2010 (Krakau, 2010)

Plaster Casts of the Works of Art

Fig. 9. Western part
of the cathedral.
Console of effigy
of St Stanislas.
Inv. no. mnk l-g-14.

Typical damages
of plaster as a result
of prolonged water
activity, deep cavities
hollowed out by water
drops.
Photo by Michał
Obarzanowski

Fig. 10. Tomb of king
Ladislaus Jagiełło,
King's effigy.
Inv. no. mnk l-g-84.
Cluster of microorgan-
isms at the back side
of the object.
Photo by Micha!
Obarzanowski

or colloidal silica, cleaning with saturated solutions of calcium sulphate. Finally,
a method that can be called "strappo", when the surface is covered with a coat
of a peeling-cleaning agent, which, while drying, forms an elastic coat that next
can be peeled off the surface together with a layer of dust and dirt adhered to it.
The best results were obtained by the last method. Different kinds of formulas were
tested, including modified methylcellulose or starch-based pastes, modified polyvinyl
acetate and modified latex. Remmers Arte Mundit type 1 latex, a self-vulcanising
paste, proved to be the most satisfying cleaning agent.

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