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Table 4 Raman band positions for Iberian inks and iron-polyphenol references; Raman bands used for a positive identification of iron-gall inks are shaded in blue, in historic documents, occurred around 1470 cm−1, between 1315 and 1350 cm−1, 490–640 cm−1 (broad) and 400 cm−1

From: New insights into iron-gall inks through the use of historically accurate reconstructions

  1. br., broad; m, medium; s, strong; sh, shoulder; w, weak; vw, very weak