Quote Originally Posted by Ryuji View Post
Is this true with others' experience?
I've a friend (professional landscape photographer in Colorado who started out as a physics PhD and systematically approaches these questions with precision/accuracy) whose word I trust completely. He reports that TMY and 400TMY (not necessarily TMY-2; insufficient long-term experience with that one yet) do not age well at all, even when kept in a freezer their entire storage lives.

The same friend indicated that 100TMX and 320TXP sheets age very well under those same conditions. It was based on his input that I decided to stockpile a large quantity of 320TXP over the last year, mostly 5x7 plus a bit of 8x10.