Non Destructive Detection of Iron-Gall Inks by Means of Multispectral Imaging Part 2: Application on Original Objects Affected With Iron-Gall-Ink Corrosion

The FCIR method for analysing iron gallotannate ink has been applied to some practical cases, i.e. for identifying the chemical quality of script and drawing on historical documents which to the naked eye appear indiscriminately black, in the same way as paper that is heavily decayed by ink corrosio...

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Veröffentlicht in:Restaurator 2003-01, Vol.24 (2), p.88-94
Hauptverfasser: Havermans, John, Aziz, Hadeel Abdul, Scholten, Hans
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description The FCIR method for analysing iron gallotannate ink has been applied to some practical cases, i.e. for identifying the chemical quality of script and drawing on historical documents which to the naked eye appear indiscriminately black, in the same way as paper that is heavily decayed by ink corrosion. Using FCIR those consisting of iron gallotannate ink appear as red while the corroded paper remains black, thus allowing us to see the amount of damage. La méthode FCIR servant à analyser l'encre gallique a été appliquée à certains cas pratiques, p. ex. pour identifier la qualité chimique de certains écrits et dessins contenus dans des documents historiques et qui apparaissent tous noirs à l'oeil nu de la même façon que le papier qui a été fortement dégradé par une corrosion à l'encre. L'utilisation de la méthode FCIR permet de mettre en évidence la couleur rouge de l'encre gallique alors que le papier corrodé reste invariablement noir, ainsi il est possible d'évaluer le degré de la détérioration. Es wird über die praktische Anwendung der Falschfarben-Infrarotphotographie zum Erkennen von Eisengallustinte berichtet, nämlich zur Unterscheidung von Schrift und Zeichnungsstrichen in historischen Objekten, die für das bloße Auge unterschiedslos schwarz erscheinen, ebenso wie Papier, das bereits stark tintenfraßgeschädigt ist. . Bei Anwendung der genannten optischen Methode erscheint Eisengallustinte als rot, geschädigtes Papier aber unverändert als schwarz, was eine Einschätzung des Schadensgrades erlaubt.
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subjects Applied sciences
Exact sciences and technology
Paper, paperboard, non wovens
Polymer industry, paints, wood
Properties and testing
Wood. Paper. Non wovens
title Non Destructive Detection of Iron-Gall Inks by Means of Multispectral Imaging Part 2: Application on Original Objects Affected With Iron-Gall-Ink Corrosion
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