You're welcome. More info:
Most of those films (at least P30) were made and designed by Ferrania before the aqcuisition of Ferrania by 3M (1964).
In 1948 Ferrania had the second 'monopack' color negative film in history (after Agfa):
Ferraniacolor with what was ASA 10 or 16 if i recall correctly. First movie made with this film was "Totó a colori", 1952. The actors must have suffered working with a film
that slow!
3M invested in Ferrania because (i guess) their plan was to compete against Kodak (3M was already a big company by then and was leader in magnetic tape production as well as other types of tape. 3M is an amazing company!)
3M had acquired Dynachrome previously. Dynachrome was founded by ex-Kodak engineers and had a film that was Kodachrome (K12?) compatible, and in contemporary reviews this film held its own against the Kodak, Agfa, and Ansco products.
After 1964 i understood that some of this Dynachrome (3M Dynachrome) was made by Ferrania as well, so i guess Ferrania also made Kodachrome-compatible film.
During early 80s it seems that 3M wanted to also enter the professional field and a few innovative films were released that broke the 'speed' barrier: 3M ColorSlide 1000 and 3M ColorSlide 640T, which were the fastest silde films available. Alas they must have marketed them in a very poor way because the contemporary film reviews i've seen of 640T were good. With their tape division as well they had another problem -- they were the clear technical leaders but they were not profiting from the business, or so i've read. By the way, AGFA was also a competitor to 3M on the professional audio tape segment.
Later 3M split off the imaging division to IMATION and i guess that the corresponding Imation Chrome was aimed more as an amateur, low cost, good E6 film. Which is what I would love to have now.
So the guys at FILM Ferrania must own right now a lot of intellectual property - lots of formulas, etc.
I've read that Fellini's "8 1/2" was filmed on Ferrania P30 stock. It would be nice to see if somebody finds out a list of films made in Ferrania stock.