Quote Originally Posted by Gerald C Koch View Post
To reduce oxidation to a bare minimum store the developer in a glass bottle not a placstic one. All plastics are permeable to oxygen to a greater or lesser degree.
Yes, understand and totally agree. PE is not the best, PET is much better (and cheap, just soda bottles). But PE is not terrible, as plastics go, considering that these are the collapsable bottles that let me remove all the internal air, so that all that remains is through permeation, which is low with PE plastic. I've avoided glass, because I don't have a clue where I'd find marbles in Beijing to fill up the void. I'm ok with losing a little life to minor oxidation. So far, my PE bottles have kept the stuff alive for longer than the rated life according to the Tetenal manual, so I'm satisfied.