Deterioration Patterns Wallpaintings

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Author: Nicole Riedl

Translation of the German Version by Hans-Jürgen Schwarz

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Lime sinter crusts

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

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.

The permeability is a measure of the ability of a porous material (often a rock or unconsolidated material) to allow fluids to pass through it. Am material with a high permeability lets the fluid pass through faster than one with a low permeability.