Quote Originally Posted by mr.datsun View Post
In theory could a developer develop the silver halides to max dMax at first run through?
If the film area is sufficiently exposed ... and that's key: few scenes will give you that. The characteristic curve goes waaaaaaaaay up.

Quote Originally Posted by mr.datsun View Post
I see your point, but in my case the R09 was used for 10 minutes and Dokumol for 12 minutes and the R09 needed less hypo.
But how fast did they do most of their work? Is there significant difference between 3 minutes of Dokumol or 12 minutes?

Quote Originally Posted by mr.datsun View Post
On a similar theme, will hypo reach an exhaustion point?
Most certainly, especially when it is as dilute as it is in reversal developers. Also note that for every Silver ion bound by Thiosulfate/Thiocyanate/whatever a free Halide ion enters the developer. In case of photographic film that means Bromide or Iodide, and both counteract fixer action and development.