Quote Originally Posted by Paul Verizzo View Post
I'll make a techno-guess and say that whatever oxygenating took place with shaking, it was far less degradation than just plain old age, sitting around at room temperature. Or, possibly, just waiting a day w/o shaking and the components would redisolve. OTOH, there was that Shutterbug article I mentioned and he apparently froze and thawed as he needed. A YMMV moment?

If one doesn't want/can't do freezing, even refrigeration would give a big leg up on longevity.
As I indicated earlier the developer can last more than three years without degradation, and this is at room temperature. In fact it's color hardly changes. So one not even need consider freezing or refrigeration. And why take up space in your fridge or freezer?