Quote Originally Posted by dudewithnofood View Post
I just looked at the one i have at home too and it also says ammonium alum. Whats the difference anyway? Is ammonium alum really bad for the skin? Either way, i picked up the spray that's made with potassium alum. For some reason I like the thought of a spray. Would it make any sense at all to mix a couple of spritzes with the lather?
The ammonium ain't good for the face. Its way too strong and will burn your face way more than the potassium type.