bi3mw > 05-11-2019, 08:33 PM
Quote:.... These findings are supported by results from the study of Smith et al., who noted the presence of both oil and protein, i.e., egg or hide glue. With respect to 14 C analysis, this dual carbon source is at first glance not ideal. However, with a deeper insight in paint treatise, it is well known that oil binders and egg tempera must be fresh for application; thus owing that both compounds are of natural source, it is reasonable to assume a similar 14 C signature for both compounds. ....
bi3mw > 05-11-2019, 11:51 PM
Koen G > 06-11-2019, 12:24 AM
ReneZ > 06-11-2019, 07:07 AM
bi3mw > 06-11-2019, 01:53 PM
bi3mw > 06-11-2019, 05:32 PM
Quote:Subject: Age determination of protein-containing ink by the C14 method
Ladies and Gentlemen,
With great interest I have read the following article in which your institute is mentioned:
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My question from amateurish interest is whether it is technically possible to determine the age of protein-containing ink (protein, mixed with calcium carbonate) in a medieval manuscript. The ink was applied on vellum. Specifically, this is the so-called Voynich manuscript (MS408). The McCrone Institute in Chicago had already determined the age of the vellum using the C14 method (approx. 1420) and analyzed the composition of the inks. The above mentioned protein glaze was also discovered.
The Voynich manuscript still has the theory of a modern forgery, i.e. the ink was applied to the vellum much later. If, however, it is possible to determine the age of the ink, this theory would be refuted or confirmed. Before I turn to the owner of the manuscript ( Beinecke Rare Book and Manuscript Library ) with the idea of an appropriate investigation, I would be pleased about your professional opinion.
Yours sincerely,
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Quote:Dear Mr. Wille,
Yes, protein would give us the required carbon.
As in the presented paper that you mention in this email this is possible with very small samples however still the amount of the binder will require sampling of the ink.
I would like to ask if you are researcher working with that document?
Do you know what is the protein % in the ink?
Only then we can say how much we need to sample. That means we will have to scrape off the ink.
Best wishes, Irka Hajdas
----------------------------------------------
ETH Zurich
Dr. Irka Hajdas
Laboratory of Ion Beam Physics
HPK H25
Otto-Stern-Weg 5
CH-8093 Zürich
Koen G > 06-11-2019, 05:39 PM
davidjackson > 06-11-2019, 10:33 PM
RobGea > 07-11-2019, 12:09 AM
ReneZ > 07-11-2019, 06:38 AM