You mean on a daily basis, when you don't tone or moisturise, or how long does it take to get results? I'll answer both.
After washing and drying, it might feel tight and dry. Within a half hour, the skin's natural oils have provided enough lubrication to not need to moisturise.
In about 3 months it was all cleared up....it went through stages of being uncomfortably dry and tight but I just waited it out and it's sorted itself out. And I am never an oil slick anymore - which was a major problem for me, with the acne. I am still a *tad* oily around the nose, but no more shiny oil slick. It's not that gross, thick type of oil you get with bad acne.
Oh, make sure it's cold tap water, not warm water. I did read why somewhere...something about the opening of the pores I think. I even stopped using an abrasive exfoliant - to exfoliate/scrub now I use a dry towel. Wash morning and night. I use a non chemical face wash in the shower only a couple of times a week, same as the moisturiser.
You can read a lot about the water only method on the net. It won't produce instant results, but after a couple of weeks I really noticed. If you're used to using major chemicals for your acne, it may take longer, as the skin is used to all those chemicals providing for it.
I still use a spot treatment for the odd pimple, but have not had any gross pusy acne for ages. I am starting to get the good skin again that I had in highschool!
Bookmarks