What do you do with reverse processed black and white film? Do you mount and project individual frames? Are there any advantages to scanning reverse processed black and white film rather than negatives?
Medium format and (4"x5") sheet film isn't really meant for projecting, although...
This way of working was above all meant for offset printing. But, slides (= translucent positive image) had the advantage of easy scanning AND could serve as a kind of general reference standard in the production chain.
Not to mention the broader tonality of a B&W slide.
As I already said: publishers, graphic designers, photoengraving, chromiste (=a person who manages the reproduction of the colours and densities in a printing process), printer; they finally all got exactly the same camera original
(I always made doubles (not copy's)) as a non disputable reference document: "follow the slide" was the mantra...
This also meant that rather a lot depended on my professional insights, whatever went wrong, the photographer got shot (not the pianist).
For colour assignments, my most used measuring instrument, besides the (flash-) exposure meter, was the the colour temperature meter, and of course, add to that a ton of (B&W-) Polaroids and a bunch of CC filters (from LEE)!
B&W Polaroid was much more trustworthy than the colour ones, as the exposure reference was far more close (the colour's ware to bad).
BTW, digital changed a lot, if not all, but that's an other story!
My slides traveled all around, from one to the other, who had a hand in the final result/product, wether it was a printed brochure, - folder, - magazine or - book.
As a matter of fact, not the picture as such was sold but the publishing of it! The original slide had to be returned, if that ever happened...