Academic thesis
| Matthias Kilchhofer: | Calcium oxalates on surfaces of natural stones and plasters | back |
| Language: | Original - Translation | |
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| Abstract: | Calcium oxalates are often found as an essential part of patina films on natural stone and plasters. As hardly soluble salts, calcium oxalates in natural patinas act as a protective layer against acid solutions und decay caused by the atmosphere. Based on this knowledge, a conservation method which generates an artificial layer of calcium oxalates has been developed by the opificio delle pietre dure in Flor-ence, Italy. By means of an aqueous solution of ammonium oxalate, a thin layer of calcium oxalate can be produced on calcareous surfaces like marble and fresco. This artificial film of calcium oxalates has a maximum thickness of 10 μm and acts demonstrably as a surface protector against acid solutions. It is, therefore, a pre-ventative conservation treatment for natural stone and plasters against decay, caused by the atmosphere. |
| Keywords: | calcium oxalates, preventive conservation, stone conservation |
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| Contact: |
Matthias Kilchhofer mkilchhofer@[Diesen Teil loeschen]hotmail.com |
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This work is licensed under a Creative Commons BY-NC-ND 3.0 Germany License.
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| DOI (Digital Object Identifier) | 10.5165/hawk-hhg/104 |
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