Codex Bezae (1992)
David C. Parker
https://books.google.com/books?id=qmy92ZolKikC&pg=PA22



We come finally to the materials used by the scribe and to the finished book. The parchment is very carefully prepared and fine. The thinnest leaves are only 1 1/2 thousandths of an inch thick (Cockerell). This may be compared with the Codex Sinaiticus, whose thinnest leaf has large areas under 0.0015 in'; most leaves are between 3 and 6 thousandths of an inch (Milne and Skeat, p. 71). It is not surprising that there are a few lacunae in the material, around which the scribe wrote.

The ink is aptly described by Lowe as olive brown (CLA). The release of acid from the compound has, as in other ancient manuscripts, eaten through the parchment, leaving a stencil of many letters. As is always the ease, the ink has adhered much better to the hair than to the flesh sides.
Unless the manuscript is named Codex Sinaiticus. Then, when the CSP studies try to show an eaten-through parchment, it turns out to be a heavy erasure!

flaking ink - does it expose white parchment colouring over ink?
http://www.purebibleforum.com/showthread.php?117-flaking-ink-does-it-expose-white-parchment-colouring-over-ink&p=266#post266

"
However I do strongly believe that the corrosion was already there. In fact, the area of the specific word was previously
erased and corrected. This made the parchment support even thinner than it already is. For this reason the ink affected the parchment in a more severe way creating holes."

So the ink corrosion was more likely
erasing corrosion!
Codex Sinaiticus has very little (none that I have seen in the normal pages, of course a heavily damaged New Finds page might be different) of the corrosion to parchment from the ink acids that David C. Parker says frequently occurs in our ancient manuscripts. It is hard to find any stenciling, except if there was an erasure to weaken the parchment.

Yet, once again, the scientists and manuscript experts can not consider the one consistent understanding.

The manuscript is 180 years old, not 1,650 years old.

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An interesting similar point is how the Fountain Pen Network wanted to use Codex Sinaiticus as an example of ink lasting thousands of years without deteriorating the parchment.
http://www.fountainpennetwork.com/fo...ron-gall-inks/