As for edge markings, that would be a complicated thing to add as the film is nade in a large size then guillotined and stacked (with protective paper between? I can't remember). In order to edge mark it, it would need to be separated out, exposed and stacked again.
Really not worth the bother.
Well I disagree with this part, kodak and Fuji seem to have no issues doing it, I'm sure it's imprinted at the same time it's notch codes are put in, and no, there's no paper separating the sheets on Fuji, Ilford, or Kodak.
~Stone | "...of course, that's just my opinion. I could be wrong."~Dennis Miller