It shouldn't be this difficult. Film Ferrania says this is an ISO 80 film. The ISO criteria are clear and if Ferrania has tested the film and found it to be ISO 80, that is the real speed of the film. It would be fairly easy to validate this. For those doing their own Zone System-style tests, an ISO 80 film should basically have a "personal EI" speed of 50.
As I said in another thread, our co-founder Marco Pagni takes ISO very very seriously. We have chosen the "80 ASA" designation instead because it was historically accurate and because Marco says we can't call it 80 ISO until he says so.
Several people have attempted to confirm the "actual" speed of the film through various methods.
I understand that some feel compelled to do this, but to be perfectly frank, 99% of our customers just shoot the film at 80 ISO and they seem to be loving the results.
The folks in the factory are certainly very concerned to dial-in our films to meet ISO standards - but we simply do not have the staff necessary to do this quite yet.
Considering that we quickly and easily sell every single roll we make, I am FAR more concerned that we make MORE of what we have been making - and that our customers love it.
Funny side note:
A friend of mine in Germany dropped her P30 at dm - a chain of drugstores that is the US equivalent of RiteAid or Walgreens.
The prints they gave her were terrible, but the negatives themselves were amazing.
And I can hardly think that they took the time to analyze the film or consult our Best Practices PDF. They just processed it like they process any 80 ISO B&W film.
I was truly stunned at the results, and quite excited that our German customers will have the option of dropping P30 at their corner drugstore!