By the way, regarding low temperature storage of e6 chemicals (in a fridge), Rob Landry reports excellent results in *freezing* 1L containers of the mixed chemicals and thawing them before use. There are several threads on apug and photo.net describing his procedures and results. I don't know how long one can store the frozen solutions, but apparently freezing doesn't damage the materials and one would assume that it would slow down the adverse effects of oxidation.

Cheers,

Warren Nagourney