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Figure 3
Results like those of Fig. 1[link], for a 1664 Italian (Tuscany) specimen (image size 18 mm × 14 mm). The radiograph reveals otherwise nearly invisible holes caused by ink-induced paper corrosion.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 22| Part 2| March 2015| Pages 446-451
doi:10.1107/S1600577515000314
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