Alan, it was in 2009 I think , and is a video interview on LL. The type of interview that means a lot to most, and those on the trails of these topics a lot more.
Agreed Mark is taking this much further. Yet it has to be done in na way that doesn't step on toes, as Mark knows all too well.
Dark storage is an important part of permanence testing, but of course you're right if the purpose of display permanence is to be exposed to light , dark storage and possible auto-catalytic decay would/should be a moot issue. That is until it is put back in storage, LOL.
I read the entire book by Henry. While I thought why would I read about film no longer sold, it actually said something . That something is research sometimes finds the unexpected. That is where the real devil may be in OBA.
BTW I only followed the video , and remembered what Henry said about alpha cellulose being different than wood pulp in being that lignin are removed chemically. Whereas coton fibre ( is it a hemp plant?) has none to begin with.