Adds Hardness to Bar?:
Yes! Makes a nice hard, very white bar of soap!
Creates Fluffy Lather?:
Yes! Big fluffy lightweight bubbles.
Creates Stable Lather?:
No...though it certainly does add to the lather. Use a combination of other oils to make the lather more stable.
Adds Moisturizing Qualities?:
No. Most soap makers warn not to use more than about 30% coconut oil in your recipe or else it will be drying. There is some debate about this - but 30% still makes a super hard fluffy lathering bar! And there are plenty of other moisturizing oils.
However, as a bit of a soap making anomaly, you can make a wonderful bar of 100% coconut oil soap by significantly increasing the superfat to 20%.
Coconut oil is the backbone of most soap maker's recipes. Even 10% of the total recipe will improve the lather. A 100% coconut oil soap is the only soap that will lather in salt water.