[article] 
inStudies in conservation > Vol.67 N°7-8(2022; October-November) (2022-10-01) . - P. 389-399

Titre :	Polyvinylamine Gel as a Cleaning Agent for Removing Mineral Crusts from Archaeologically Important Stone Artifacts
Type de document :	texte imprimé
Année de publication :	2022
Article en page(s) :	P. 389-399
Note générale :	Huarui Han, Jianrui Zha, Feng Wang, Linlin Zhou, Ankun Wang & Shuya Wei
Langues :	Anglais (eng)
Catégories :	Calcaire -- Conservation et restauration Imagerie infrarouge Marbre -- Conservation et restauration Polymères vinyliques Sculpture en marbre -- Nettoyage -- Méthode comparative Sculpture en pierre -- Nettoyage -- Méthode comparative
Index. décimale :	7.025 Dommages. Conservation. Protection
Résumé :	When stone objects are excavated at archeological sites, they are often covered with crusts of mineral deposits on the surface, which seriously obscure their aesthetic value, especially in the case of polychrome stone statues. To remove these carbonate crusts without damaging the underlying painting and stone matrix, a gel-based cleaning system combining polyvinylamine (PVAm) and acetic acid is proposed. The structures of the PVAm cleaning gels were characterized using X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. Employing samples of the typical types of stone used in polychrome statues (marble and limestone) and painted samples, the cleaning efficiencies, surface morphologies, and chromatic alterations resulting from treatment with the different cleaning gels were evaluated and compared. Based on the obtained results, the optimal composition of the PVAm cleaning gel was determined.
En ligne :	https://www.tandfonline.com/doi/abs/10.1080/00393630.2021.1935119

[article] Polyvinylamine Gel as a Cleaning Agent for Removing Mineral Crusts from Archaeologically Important Stone Artifacts [texte imprimé] . - 2022 . - P. 389-399.
Huarui Han, Jianrui Zha, Feng Wang, Linlin Zhou, Ankun Wang & Shuya Wei
Langues : Anglais (eng)
in Studies in conservation > Vol.67 N°7-8(2022; October-November) (2022-10-01) . - P. 389-399

Catégories :	Calcaire -- Conservation et restauration Imagerie infrarouge Marbre -- Conservation et restauration Polymères vinyliques Sculpture en marbre -- Nettoyage -- Méthode comparative Sculpture en pierre -- Nettoyage -- Méthode comparative
Index. décimale :	7.025 Dommages. Conservation. Protection
Résumé :	When stone objects are excavated at archeological sites, they are often covered with crusts of mineral deposits on the surface, which seriously obscure their aesthetic value, especially in the case of polychrome stone statues. To remove these carbonate crusts without damaging the underlying painting and stone matrix, a gel-based cleaning system combining polyvinylamine (PVAm) and acetic acid is proposed. The structures of the PVAm cleaning gels were characterized using X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. Employing samples of the typical types of stone used in polychrome statues (marble and limestone) and painted samples, the cleaning efficiencies, surface morphologies, and chromatic alterations resulting from treatment with the different cleaning gels were evaluated and compared. Based on the obtained results, the optimal composition of the PVAm cleaning gel was determined.
En ligne :	https://www.tandfonline.com/doi/abs/10.1080/00393630.2021.1935119