Fascinating. So guessing, what speed emulsions do the current ISO 800 films on the market use for the different emulsions? Also for tungsten film, I would imagine the blue layer is a faster emulsion?

How does this compare to the high speed B&W films? I know from reading your other posts that B&W films use a blend of speeds too, but for an ISO 800 B&W film (like TMZ), roughly what speed emulsions make up the final product?

Lastly, this is somewhat unrelated, but in terms of paper, what CI's or gammas correspond to what grades (roughly speaking)?