| Abstract: | SUMMARIES. Foxing stains on six different papers from the 16th-18th centuries and additionally fox-like stains produced by dropping different amounts (1, 3 and 5 ul) of solutions of FeCl3, KCl and FeCl3+KCl (5.10-3 M) on modern paper and artificially ageing were analyzed for chromaticity, fluorescence under UV ilumination, carbonyl content, thickness and subumitted to IR spectroscopy and XRF spectrometry. As a result it is stated that the foxing phenomenon is related to a strong oxidation of the cellulose chain. Not regarding certain and possibly specific differences between different kinds of foxing stains, this strong oxidation is the only common characteristic for foxed areas. |
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