By the way, Ferrania insists P30 is an ISO 80 film:
"Shoot at 80 ISO. We firmly recommend shooting this film at the box speed of 80 ISO."
And that is the big problem, because it is not an ISO 80 film, not at all.
Both the former ASA and the current ISO norm are evaluating film speed by measuring shadow detail. In case of the ISO norm, a logD of 0.1 at Zone I is required.
And P30 cannot deliver that, not even close to it.
I have tested many rolls of P30, and developed them in different developers. And the real speed of this film (based accurately on shadow detail and ISO norm) is about two to three (!!) stops less than 80. Real speed is only in the ISO 10-20 range.
The other huge problem with this film: The extremely steep characteristic curve. It is impossibly to get a wide greyscale with good tonality. Because of the brutally steep curve (I have evaluated all my tested P30 - developer combinations with a calibrated densitometer) you can either have shadow detail - but then get blown out / too dense highlights.
Or when you adopt your exposure and development for the highlights with reasonable highlight detail, then you get empty shadows without details.
But a normal linear shaped characteristic curve with (very) good tonality from the shadows up to the highlights is not possible with this film.
When you are shooting this film at ISO 80, you are pushing it significantly, and sacrificing shadow detail. Period.
If I want such an very contrasty look I could do that with any other standard BW film just by pushing it, but at a much lower price (P30 is more expensive than its competitors).
Honestly, I was disappointed with this film, as it has no advantage compared to the established films. But many severe disadvantages.
I really hope Film Ferrania is going for better products with their future offerings, as I wish them well and hope they can stay in business for the long run (and finally making color film in the long run, but I think Inoviscoat/Filmotec under their ORWO brand name will be much faster in that regard, at least with movie film offerings).