Can small variations in the pH of the water used for mixing have material/significant effects on film developer activity?
The question would probably only pertain to dilute, weakly buffered developers. Perhaps even in weakly buffered developers the alkali still provides enough buffering to render small pH variations in water meaningless.
I’m asking out of curiosity regarding potable tap water (and/or filtered water) vs distilled/deionized – strictly concerning pH. It seems typically, tap and/or filtered water is slightly alkaline and also very weakly buffered due to the presence of dissolved ions etc. My understanding is distilled/deionized/purified water is slightly acid, the pH is inversely related to temperature, and there is no buffering since it pretty much contains only H2O.
Are these small variations neutralized by the alkali in virtually any developer?