Appearance-based evaluation of varnish removal methods in gilded surfaces

Heritage Science

Research

Stéphanie Courtier¹  Yoko Arteaga²  Clotilde Boust³  Jon Y. Hardeberg⁴  Diane Marchioni⁵ 

[1] Centre of Research and Restoration of the Museums of France, Paris, France;Centre of Research and Restoration of the Museums of France, Paris, France;Department of Computer Science, Norwegian University of Science and Technology, Gjøvik, Norway;Centre of Research and Restoration of the Museums of France, Paris, France;PSL-PCMTH UMR8247, CNRS, Paris, France;Department of Computer Science, Norwegian University of Science and Technology, Gjøvik, Norway;National Heritage Institute, Paris, France;

关键词: Gilding;    Material appearance;    BRDF measurement;    Varnish removal;    Gloss;   

DOI  :  10.1186/s40494-023-00868-w

 received in 2022-08-05, accepted in 2023-01-17,  发布年份 2023

来源: Springer

【 摘 要 】

This paper outlines the use of bidirectional reflectance measurements for the characterisation and evaluation of appearance changes in gilded surfaces caused by varnishing and cleaning. Oil and water gilding mock-ups representative of a 15th-century panel painting were varnished, and a selection of four varnish removal methods was applied. By measuring the bidirectional reflectance of the samples, their appearance was modelled and evaluated according to perceptual gloss attributes. Three main perceptual groups were found for each gilding type: unvarnished, varnished and cleaned surfaces. Finally, for the studied samples, the most appropriate method for removing dammar and colophony varnish from a gilded surface, in terms of appearance change, is solubilisation by applying an Evolon®CR compress.

【 授权许可】

CC BY   
© The Author(s) 2023

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