文章基本信息

标题：Retrieving Tarnished Daguerreotype Content Using X-ray Fluorescence Imaging—Recent Observations on the Effect of Chemical and Electrochemical Cleaning Methods
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作者：Alison Stark ; Fraser Filice ; James J. Noël 等
期刊名称：Heritage
电子版ISSN：2571-9408
出版年度：2021
卷号：4
期号：3
页码：1605-1615
DOI：10.3390/heritage4030089
语种：English
出版社：MDPI AG
摘要：We report a study on the effect of chemical and electrochemical cleaning of tarnished daguerreotypes observed using X-ray fluorescence (XRF) microscopy with a micro-focussed X-ray beam from a synchrotron source. It has been found that, while both techniques result in some success depending on the condition of the plate and the experimental parameters (chemical concentration, voltage, current, etc.) the effect varies, and cleaning is often incomplete. The XRF images using Hg L<sub>α,β</sub> at an excitation energy just above the L<sub>3</sub> edge threshold produce fine images, regardless of the treatment. This finding confirms previous observations that if the bulk of the image particles remains intact, the surface tarnish has little effect on the quality of the original daguerreotype image retrievable from XRF.