Oxidized 51-57 Imperf 3c

Just out of curiosity, is there a particular plate that has more oxidized stamps than any other plates?
In my collection it seems to be more often I find oxidized stamps from plates 2L and 3.

Examples 71L2L & 72L2L



Here are a two oxidized stamps that have yet to be plated. Sorry for that second stamp, it's a little scruffy!




Thanks.

My belief is this would be more a function of the ink chemistry used for given time period(s), rather than a given plate.

So if several plates were in use at the same time period, and all were inked with the same or similar ink, then I would expect a roughly similar rate of oxidation/sulfuretting across the plates.

I'm assuming identical paper and atmospheric conditions to keep things simpler to think about.