[split] Jorge's Retracer Thread: darker ink, retracing of text and drawings

[Jorge_Stolfi]

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PS. I cannot find this info on the library's webpage, but it seems that the material is paper.  And there are at least three ink color on the page: besides the main brown ink and the "invisible' ink of the "scripto secreto", there is another ink, still reddish, used for underlining:
   
I can't tell what the brown ink could be.  Since it is paper, iron-gall ink would not be the best choice.  It may have been used for convenience, if there was some of it around for writing on vellum.  The best choice would be lampblack (india) ink, but that is black and does not change color.  My best guess is that it is sienna, as a watercolor.

All the best, --stolfi