I'm not positing I have a concrete answer. Far from it, in fact. I am just experimenting and posting my own thinky thoughts, hoping someone will chime in.
This is my tap water, which is roughly 7ish (neutral). I test my foaming cleansers either straight out of the container or if it's too thick and messy, lathered up with some water. So what I did was I took my three snazzy balm cleansers...
And emulsified them with the tiniest bit of water. Which is the same thing I do when I wash my face anyway. Then when they're all nice and emulsified, I tested pH. My results?
|Banila Co, ~5ish.|
|The Face Shop, ~5ish again.|
|su:m37, ~5ish once more!|