Visualising iron gall ink underdrawings in sixteenth century paintings in-situ by micro-XRF scanning (MA-XRF) and LED-excited IRR (LEDE-IRR)

被引：0
作者：
Mareike Gerken
Jochen Sander
Christoph Krekel
机构：
[1] Städel Museum,
[2] Staatliche Akademie der Bildenden Künste Stuttgart,undefined
[3] Goethe-Universität Frankfurt am Main,undefined
来源：
Heritage Science | / 10卷
关键词：
Iron gall ink; Underdrawing; Panel paintings; MA-XRF; IRR; LEDE-IRR; Microscopy; Holbein the Elder; Cima da Conegliano; Sixteenth century;
D O I：
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学科分类号：
摘要：
Until today, iron gall ink is classified as an exceptional underdrawing material for paintings. Its study and definite identification is usually based on invasive analysis. This article presents a new non-destructive approach using micro-X-ray fluorescence scanning (MA-XRF), LED-excited IRR (LEDE-IRR) based on a narrow wavelength-range of infrared radiation (IR) for illumination and stereomicroscopy for studying and visualising iron gall ink underdrawings. To assess possibilities and limits of these analytical techniques, the approach was tested on panel paintings by Hans Holbein the Elder and Giovanni Battista Cima da Conegliano. Results are compared to invasive examinations on cross-sections using scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDX). The holistic setup could successfully visualise iron gall ink underdrawings, allowing to harness the formerly invisible underdrawing lines for interdisciplinary studies.
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