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"But (and it's a very very big But) the "ink" of the Vinland Map was
shown by the first scientists permitted to study the map- the British
Museum investigators in 1967, well over a year after after the official
book about it was published- to be neither iron-gall nor any other
formulation they had ever seen.
David Bradbury"
That is fair enough, but the point was really more geared to the idea
that the ink would just "sit" on the parchment. There are other studies,
considering other types of ink, that would argue that other types of
inks are also not inert, and would interact with parchment over time:
http://www.jstor.org/stable/4201558,
http://www.ndt.net/article/art2008/papers/140Bicchieri.pdf,
http://adsabs.harvard.edu/abs/1993NIMPB..75..488C.
Joel Kovarsky
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