Gilded copper studied by non-destructive energy-dispersive X-ray fluorescence
In this paper, various methods that have been developed to analyse gilded copper samples and to determine gilding composition and thickness are discussed. All of these methods are based on energy-dispersive X-ray fluorescence (EDXRF). EDXRF allows for the determination of the internal ratios of Cu and Au-X lines through an accurate quantitative analysis of EDXRF spectra. The 'anomalous' ratios of Cu and Au-X lines, and the ratio (Au/Cu), allow for the determination of the gilding thickness with an error of less than 5%, in a thickness interval of 0.1-5 μm. These methods have first been tested on standard gildings and then applied to copper gilded pens and employed to study pre-Columbian gilded copper artefacts from the north of Peru. Finally, a gilded inscription at the top of the Trevi Fountain in Rome was analysed.
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Document Type: Research Article
Publication date: January 1, 2018
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- Official Journal of The British Institute of Non-Destructive Testing - includes original research and devlopment papers, technical and scientific reviews and case studies in the fields of NDT and CM.
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