Figure 2 | Scientific Reports

Figure 2

From: Browsing through sealed historical manuscripts by using 3-D computed tomography with low-brilliance X-ray sources

Figure 2

Energy-dispersive X-ray spectroscopy of the inks: malachite ink consists of Cu. For all three iron gall inks, the elements Fe and S were detected (one exemplary ink is shown). Tyrian purple ink consists of Al, S, Cl and Sn. Buckthorn ink does not consist of metallic particles, but only C and O. All spectra show C and O which is caused by the cellulose of the paper.

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