Jim, much of film IS well past it's expiration date. I don't know why that would give it "memory" but maybe it's possible. Wash temps are 100 degrees. My thermometers are accurate and the resulting chromes are perfect as they have been since I started E6 processing a few years ago.
1. film is not washed enough causing a dry time discrepancy between the base and emulsion - solution: wash longer, in water 24-30C.
2. Dry temp is too high on one side (or both), or dry time is too short (heat to high) - solution: air dry with no heat.
3. possibly a chem mix/old film issue, but that is less likely in my opinion.
Have you tried with fresh film ? That may narrow down the reason for the curling,
you never mentioned which side the curl is I assumed emulsion since the emulsion side
faces in on expert drums and the film is curled that way.
I'll take that pesky drum off your hands
I souped a batch of 4x5 and 8x10 yesterday and noticed that all (velvia and velvia 100) but one sheet (E100s) of the 4x5's was curled. All of the 8x10's had curl.
Today I did a batch of c41 (ektar and ilford xp2) and all those came out flat.
Drying is even since the film is hanging. Now using Tetenal chemicals, same results. If I had an intellifaucet and 8x10 film washer, I could try washing outside my expert tanks.
Wait, you only photograph once a year? :-)
+1 on no curl in Jobo tanks regardless of film/chemistry - E6/C41/B&W - or film size/brand.
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