The claimed Voynich page

[Fabrizio Salani]

Just for the record, Fabrizio, I am 100% convinced of your honesty and also appreciate your openness. 

But I also believe that currently, the most likely explanation is that someone made this as a craft project. Decent color scans have been available worldwide since 2004.

If you're a 21st-century amateur, the question of aging camping ink still remains. Camping inks from the last 60/70 years are made with high tannins to prevent discoloration and color shifting over time, mixed with biocides (not present), gum arabic (not present), rock alum (not present), chromium salts (not present), copper sulfate (not present), and acetic or oxalic acid (not present).
Then I imagine that in the last 30/40 years everything can be falsified.