Quote Originally Posted by Ken Lee View Post
Why do you feel that you need a 2-part developer ?
Excellent question!

Quote Originally Posted by sanking View Post
The major reason to use any two-bath developer is to avoid negatives of very high contrast. The mechanics of two-bath development holds contrast to a finite point, regardless of the conditions of exposure, and is a safe method of development where one may have exposed sheet in a wide range of subject brightness conditions and not kept good notes. It is also a good form of development for roll film that may have been exposed to a wide range of subject contrast.
Sandy's answer is naturally right on; however, I would add that I develop different films at the same time in the same drum, e.g., you developed FP4+ and Efke 25 and Tri-X in the same drum at the same time. The resulting negatives have a long tonal scale, low contrast, and scan well.