4.5 Article Proceedings Paper

Identification of iron-gall inks with near-infrared Raman microspectroscopy

Journal

JOURNAL OF RAMAN SPECTROSCOPY
Volume 39, Issue 8, Pages 1079-1084

Publisher

WILEY
DOI: 10.1002/jrs.1989

Keywords

Raman microspectroscopy; iron-gall ink; ink analysis

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The identification of iron-gall inks on a number of 18th, 19th, and 20th century documents and a 12th century manuscript has been conducted using near-infrared Raman microspectroscopy. These historic iron-gall inks were found to display characteristic Raman bands generally occurring around 1475 cm(-1), between 1310 and 1350 cm(-1) (variable), 490-640 cm(-1) (combined broad band), and 400 cm(-1). These bands have promise as analytical spectroscopic markers for in situ non-destructive Raman identification of iron-gall ink on historic collections and were in good agreement with Raman data collected for laboratory-prepared iron-gall ink complexes and inks prepared following traditional iron-gall ink recipes. All historic ink spectra contained a fluorescent background, the degree of which varied between samples. Copyright (c) 2008 John Wiley & Sons, Ltd.

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