Using a plain water stop and TF-4 fixer will result in a properly stained negative, so, strictly speaking, you don't have to use a pyro after-bath. But....I have found that a 2-3 minute afterbath in the used developer greatly reduces the residual sensitizing dye in the emulsion (pink in T-Max, purple in Delta.) It only takes a couple of minutes and can't hurt, so why not?(posted 8860 days ago)