Quote Originally Posted by Joanna Carter View Post
I live near enough to Ilford to "pop in for a chat" and, when I discussed using the Jobo processor for Delta 100, I was told to avoid the prewash as the emulsion contains a wetting agent (or something like that).
Once the film is wet, either from the prewash with the wetting agent from the film or from the developer with a wetting agent from the film, it's wet.

Use a prewash or not and determine a time for your system.

(I use a Jobo and I prewash, just for the record.)