Typical C-41 and b/w minilabs are designed to move the film straight
from the developer into the fixer (or bleach-fix). There is no
intermediate rinse and no stop bath (I believe E-6 minilabs have a water
rinse after first development). Clearly for C-41 and b/w the folks at
Kodak, Noritsu, and Fuji see problem from a chemical point of view, or
for any reason having to do with processing consistency.
In a home darkroom the only potential issue I am aware of is that
without a rinse step, over time, developer gets carried over into your
fixer. A 24-exposure roll of 35mm absorbs roughly 1/3 of a gram of
developer. If you want a long working life from a gallon of fixer this
might concern you.
David Foy
For small tank development, stop bath is unnecessary. I use water rinse and it is totally adequate. However, if you prefer, you can use a dilute acetic acid stop bath, or a buffered acid stop bath.
I've started to use a water rinse stop recently because I was getting unexplained pinholes in the emulsion (which have now gone away since I changed) but since I can't control the temp of my running water, I use a fill/agitate/dump routine using pre-heated filtered water - is this going to be enough?
Paul
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