4.6 Article

A non-invasive study of the effect of three commercial cleaning products on shellac-coated mahogany

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MATERIALS LETTERS
卷 337, 期 -, 页码 -

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ELSEVIER
DOI: 10.1016/j.matlet.2023.133963

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Wood; ER-FTIR; Colorimetry; Varnish; Norway

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This study investigates the effect of three commercial cleaning products (Baolin, Centurio, Fulgentin) on shellac-coated mahogany furniture in the Royal Palace of Norway. Non-invasive techniques, such as portable ER-FTIR spectroscopy and colorimetry, are used to assess the chemical composition and color changes of fresh and aged mahogany wood mock-ups. The results suggest that one of the cleaning products may negatively impact the long-term preservation of this furniture collection.
The Royal Palace of Norway has a large 19th century wooden furniture collection and most of it is coated with shellac-based varnishes. Since these objects are part of the royal collections, they are still in daily use at the different residences and, therefore, need to be frequently cleaned. In this work, the effect of three cleaning commercial products (Baolin, Centurio, Fulgentin) used at the royal collections on shellac-coated mahogany is investigated for the first time. A non-invasive methodology (portable ER-FTIR spectroscopy and colorimetry) was applied to assess whether the chemical composition and the color of fresh and artificially aged mahogany wood mock-ups coated with shellac were affected by the above-mentioned cleaning products. This study shows that one of them causes changes in the varnished wood, thus potentially affecting the long-term conservation of this furniture collection.

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