White phenomena on the surfaces of 24 unvarnished paintings by Willem Witsen

CeROArt : Conservation, Exposition, Restauration d'Objets d'Art

关键词: Willem Witsen;    efflorescence;    blanching;    blooming;    lead soaps;    lead carboxylates;   

DOI  :  10.4000/ceroart.3994

来源: DOAJ

【 摘 要 】

White phenomena on the surfaces of 24 unvarnished paintings by Willem Witsen (1860-1923) were examined. Five types could be distinguished using a stereo-microscope. Analyses showed that the spheres consisted of pure starch, while the other phenomena noted consisted of lead soaps and salts. This paper shows that starch and the lead components may have migrated from within the paintings to their surfaces, possibly due to unstable climate conditions in the past.

【 授权许可】

Unknown