Vienna Genesis - "The extreme thinness of the parchment contributed to its degradation by ink corrosion."

[Steven Avery]

Vienna Genesis
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9354503/

"The extreme thinness of the parchment contributed to its degradation by ink corrosion."

Yet we are supposed to believe the opposite happens with Sinaiticus?