Characterising the degradation of green colourants on early hand-coloured works on paper using multispectral imaging and reflectance spectroscopy

Yun Liu; Lieve Watteeuw

doi:10.1117/12.2673630

10 August 2023 Characterising the degradation of green colourants on early hand-coloured works on paper using multispectral imaging and reflectance spectroscopy

Yun Liu, Lieve Watteeuw

Author Affiliations +

Proceedings Volume PC12620, Optics for Arts, Architecture, and Archaeology (O3A) IX; PC126200D (2023) https://doi.org/10.1117/12.2673630
Event: SPIE Optical Metrology, 2023, Munich, Germany

Conference Poster

Abstract

Being one of the most frequently used colour, green colourants not only discolourate but also corrode the paper substrate. However, the degradation phenomena and mechanisms have not been sufficiently studied. In this research, eight valuable objects from 15th – 17th century are selected from the collections in the Maurits Sabbe Library KU Leuven as case studies. Coupled with machine learning methods, narrowband UV-VIS-NIR multispectral imaging (NBMI) and fibre optics reflectance spectroscopy (FORS) are demonstrated as the state-of-the-art techniques to gain an in-depth understanding of the degradation of the green colourants, its effect on the paper substrates, and the preservation needs for the collections.

Conference Presentation

Citation Download Citation

Yun Liu and Lieve Watteeuw "Characterising the degradation of green colourants on early hand-coloured works on paper using multispectral imaging and reflectance spectroscopy", Proc. SPIE PC12620, Optics for Arts, Architecture, and Archaeology (O3A) IX, PC126200D (10 August 2023); https://doi.org/10.1117/12.2673630

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