Obsidian,
I am curious. If you have dry skin, why would you superfat at 8%?? Does this make the bar of soap more drying or more moisturizing??
It makes the soap less drying. Look at it this way, SF is excess oils or fat left in the soap, soap can only wash away so much oils/dirt so if there is extra oils in the soap, some will get left on the skin.
I've tried soap with 5% SF and they are all too drying. The amount of coconut oil used also has a lot to do with it, I can't have my soap too cleansing.