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Heritage Science
Fig. 6 | Heritage Science

Fig. 6

From: Effective cleaning of rust stained marble

Fig. 6

Photograps of in situ cleaning. Photographs of the cleaning experiments on the Marble Church in Copenhagen. a before cleaning, b the applied poultice, c after removal of the poultice. Area of poultice 74 × 58 cm. Cleaning solution: 0.1 M cys + 0.1 M SD

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