|Soiling at the surface of a limestone sculpture protected against rainfall.
France, Reims, Cathédrale Notre-Dame. Façade occidentale, portail central, 1989. Head size : ca. 40cm. LRMH DIA00015622 / J.P. Bozellec
|Thin, veil-like soiling by atmospheric dust on horizontal and subhorizontal parts of the sculptures.
France, Marseille, La Nouvelle Major cathedral, Grey Serena sandstone and white limestone, 2006. Size of the tympanum : ca. 2.5 m. CICRP / J.-M. Vallet
|This very particular type of soiling is specific of stone surfaces treated with water repellents.Water pathways are limited to narrow stripes, where algae may develop preferentially.
France, Versailles, Castle Park, marble sculpture, 2002. Large side : ca. 0.6 m. LRMH / V. Vergès-Belmin