Longevity of Ektachrome

A while ago, I obtained a somewhat large quantity of 120 Ektachrome. I knew it was seriously outdated, but since it was out of it's boxes and even it's foil wrapper, I did not know how old. I guessed it was at least 5 years out of date.

I wasn't even sure of the storage. I did know that it had been stored at room temp for at least a year before I obtained it.

Anyway, I recently shot and had a roll processed. Looked just fine to me; exposure was right on and no evidence of color shift. Speaks well for the longevity and stability of the film.

That's great. Do you have any idea how it was stored?

My guess, since it originally came from a studio, is that it was refrigerated for much of it's "in date" like, but at room temp for the last few years.

That's pretty good! Ektachrome is great to work with.

The real question is the longevity of the processed image. I've seen some E4 that is quite disappointing, but some from the same roll remained fine. All were given the same storage, and projector exposure.

I haven't seen a badly faded/shifted e6, but I bet there are some.