...See, even if we were able to say "we need X millijoules/cm² of UV to expose this process" that wouldn't mean much, because the needed energy would still depend on a myriad number of additional parameters - which may be impossible / impractical or not wanted to reproduce... That's my point...Loris.
That was my thought, too. It is difficult to talk to other carbon printers about the finer details as our pigments, pigment load, sugar load, sensitizing techniques (and strengths), our negatives, type and age of the UV bulbs, etc. are all over the place.
At least with LF landscape, a bad day of photography can still be a good day of exercise.