Probing the degradation of cadmium yellow oil paints

Marta Ghirardello; Vanessa Otero; Gianluca Valentini; Lucia Toniolo; Austin Nevin; Maria J. Melo; Daniela Comelli

doi:10.1117/12.2593596

20 June 2021 Probing the degradation of cadmium yellow oil paints

Marta Ghirardello, Vanessa Otero, Gianluca Valentini, Lucia Toniolo, Austin Nevin, Maria J. Melo, Daniela Comelli

Author Affiliations +

Proceedings Volume 11784, Optics for Arts, Architecture, and Archaeology VIII; 117840L (2021) https://doi.org/10.1117/12.2593596
Event: SPIE Optical Metrology, 2021, Online Only

Abstract

Cadmium yellows are a class of pigments based on cadmium sulfide (CdS) that can suffer degradation [1-4]. Although the degradation mechanism has been elucidated [5], the reasons behind the higher reactivity of some CdS are still unclear. It has been hypothesized that the higher reactivity can be related to an imperfect synthesis method [2-3]. This work shows that pigments synthesized following different routes [6-7] present different degrees of degradation in paints after artificial ageing. Moreover, the development of degradation products depends on the synthesis method and the photoluminescence emission from trap states [8] can be modified following degradation. Results obtained on in-laboratory prepared paints will be compared to historical degraded CdS paints from real paintings.

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Citation Download Citation

Marta Ghirardello, Vanessa Otero, Gianluca Valentini, Lucia Toniolo, Austin Nevin, Maria J. Melo, and Daniela Comelli "Probing the degradation of cadmium yellow oil paints", Proc. SPIE 11784, Optics for Arts, Architecture, and Archaeology VIII, 117840L (20 June 2021); https://doi.org/10.1117/12.2593596

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