Characterising Appearance of Gold Foils and Gilding in Conservation and Restoration

Materials with complex optical properties like gold foils are commonly used for gilding in the field of conservation and restoration to render the visual appearance of the restoration object. Characterising the appearance of these materials is important to render an accurate visual appearance that can be obtained with different gilding techniques. In this paper, the bidirectional reflectance of gold foils commonly used for gilding is characterised and as well as gilding mock-ups. The dataset of gold foils is publicly available.

[1]  Giuseppe Claudio Guarnera,et al.  Measurement and rendering of complex non-diffuse and goniochromatic packaging materials , 2020, The Visual Computer.

[2]  F. Nolting,et al.  Does substrate colour affect the visual appearance of gilded medieval sculptures? Part I: colorimetry and interferometric microscopy of gilded models , 2020, Heritage Science.

[3]  Joshua S. Harvey,et al.  Changes in the Visual Appearance of Polychrome Wood Caused by (Accelerated) Aging , 2020, Material Appearance.

[4]  Kaja Kollandsrud,et al.  Twelfth and early thirteenth century polychromy at the northernmost edge of Europe: past analyses and future research , 2019, Medievalista online.

[5]  Juan L Nieves,et al.  Multifocus HDR VIS/NIR hyperspectral imaging and its application to works of art. , 2019, Optics express.

[6]  Shoji Tominaga,et al.  Bidirectional Reflectance Measurement and Reflection Model Fitting of Complex Materials Using an Image-Based Measurement Setup , 2018, J. Imaging.

[7]  Y. Bassiakos,et al.  On the Metal‐Leaf Decorations of Post‐Byzantine Greek Icons , 2018 .

[8]  Lindsay W. MacDonald,et al.  Assessment of multispectral and hyperspectral imaging systems for digitisation of a Russian icon , 2017, Heritage Science.

[9]  Giuseppe Claudio Guarnera,et al.  BRDF Representation and Acquisition , 2016, Comput. Graph. Forum.

[10]  Floréal Daniel,et al.  The role of the under-layer in the coloured perception of gildings in mediaeval mural paintings , 2013 .

[11]  Jinwei Gu,et al.  Toward a Perceptually Based Metric for BRDF Modeling , 2012, Color Imaging Conference.

[12]  K. Torrance,et al.  Microfacet Models for Refraction through Rough Surfaces , 2007, Rendering Techniques.

[13]  Robert L. Cook,et al.  A Reflectance Model for Computer Graphics , 1987, TOGS.

[14]  F. E. Nicodemus,et al.  Geometrical considerations and nomenclature for reflectance , 1977 .

[15]  K. Torrance,et al.  Theory for off-specular reflection from roughened surfaces , 1967 .

[16]  P. Callet,et al.  INFLUENCE OF THE SUBSTRATE COLOUR ON THE VISUAL APPEARANCE O F GILDED SCULPTURES , 2007 .

[17]  Practice for Specifying the Geometry of Multiangle Spectrophotometers , 2022 .