the colour of the Mayer papyri - wholly different from that invariably found on genuine documents of the same professed age and character

[Steven Avery]

The Palgrave Handbook on Art Crime (2019)
Malcolm Choat
https://books.google.com/books?id=zZSfDwAAQBAJ&pg=PA574

Again, it was noticed that the colour of the papyri was, with two or three exceptions, wholly different from that invariably found on genuine documents of the same professed age and character, offering the strong probability that the papyri had been purposely discoloured before the present writing was put upon them.

(Royal Society of Literature 1863, pp. 4-5)

=====================================

Report of the Council of the Royal Society of Literature on Some of the Mayer Papyri, and the Palimpsest MS. of Uranius Belonging to M. Simonides: With Letters from MM. Pertz, Ehrenberg, and Dindorf, Volume 3 (1863)
https://books.google.com/books?id=4HpaAAAAcAAJ&pg=PA4

Christian Remembrancer (1864)
https://books.google.com/books?id=jvoDAAAAQAAJ&pg=PA179

Elliott p. 154

 

[Steven Avery]

 

[Steven Avery]

Elliott p. 153

p. 154

 

[Steven Avery]

CARM
https://forums.carm.org/threads/the...rong-probability-purposely-discoloured.20822/

When the manuscript is not named Sinaiticus, the experts do watch for purposeful discolouring.

Elliott - p. 153-154

... the Royal Society of Literature examined Simonides palimpsest of Uranius in February 1863. The previous month the Mayer manuscripts were reconsidered.

... it was noticed that the colour of the papyri was, with two or three exceptions, wholly different from that invariably found on genuine documents of the same professed age and character, offering the strong probability that the papyri had been purposely discoloured before the present writing was put upon them.

==========================

Also noted in:
(The Report is the Elliott source.)

Report of the Council of the Royal Society of Literature on Some of the Mayer Papyri, and the Palimpsest MS. of Uranius Belonging to M. Simonides: With Letters from MM. Pertz, Ehrenberg, and Dindorf, Volume 3 (1863)
https://books.google.com/books?id=4HpaAAAAcAAJ&pg=PA4

Christian Remembrancer (1864)
https://books.google.com/books?id=jvoDAAAAQAAJ&pg=PA179

The Palgrave Handbook on Art Crime (2019)
Malcolm Choat
https://books.google.com/books?id=zZSfDwAAQBAJ&pg=PA574

==========================

The most significant purposeful discolouring can be seen in comparing the 1844 Leipzig sections of Sinaiticus with the 1859 St. Petersburg leaves.