Castor Oil - 32 oz (1 qt)

Adds Hardness to Bar?: No...

Creates Fluffy Lather: No...not really - though it does increase the lather

Creates Stable Lather: YES! Helps increase lather quite a bit.

Adds Moisturizing Qualities?: Yes - though thick and sticky straight out of the bottle, it is easily absorbed by the skin.

Other qualities: Gives a creamy bubbly quality to the soap. There's no other oil quite like it. You only need to use about 4-6% in your recipe to see a difference. Note: Castor oil will speed up your trace.

Courtesy: Castor Oil Profile By David Fisher, About.com Guide