My consideration has been a paper free of optical brightener on a cotton base.
I'm now a little unsure if I can count Canson's Baryta Prestige II, with a base of paper and cotton, in that category.
What is your opinion?
There doesn't seem to be any standardization and therefore any rules in place.
I think your definition is in line with what many/most of us think but who knows? When a paper manufacturer company decides to list OBA content, many of them just say "Present", "Low", or "Mild" - basically words that could literally mean anything. In my mind OBA content is only relevant if your print is meant to be displayed for 20+ years. I think if we're being honest, that's not a very high percentage of our work.
Keeping a paper like Baryta Prestige II (which is a stunning paper, btw) stored in a box or archival presentation folder will most certainly ensure its longevity just as much, if not better, than an OBA free paper that's on display taking in mild amounts of sunlight - even under UV glass.
