Deterioration Patterns Wallpaintings

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Author: Nicole Riedl

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Examples of damage by salt progression[edit]

Lime sinter crusts[edit]

lime sinter crust,Roman wall-painting, Grave chamber, Nehren
lime sinter crust,Roman wall-painting, Grave chamber Nehren

Repeated precipitation of calcium carbonate formed on the surface of wall paintings a white, dense lime sinter crust. It is characterized by a high stability and strong bond with the painting. The vapour permeability of the wall painting is reduced and the crustal layers affect the aesthetic appearance considerably.

Cauliflower crust[edit]

Cauliflower crust, Grave chamber Nehren
Blumenkohlkruste, Grave chamber Nehren

Characteristic is the formation of firmly adhering Pustel?? and stable crusts. The composition may consist of calcium carbonate and calcium sulphate. Depending on the contaminants carried the cauliflower crust appear whitish, yellowish, reddish or brownish. Biogenic rests can be stored in the crustal layers.