Cosmetic Grade castor oil. Vegetable oil derived from the castor bean whose main fatty acis is ricinoleic acid. It is used in cosmetics as an emollient, though its unique property is that when dry it forms a solid film that can have water-binding properties. Castor oil can also enhance the absorption of other cosmetic ingredients. The essential fatty acids that castor oil contains help in restoring the skin's natural moisture balance. Apply castor oil gently on your face and massage in circular motions. You can even leave it overnight and wash off in the morning. You can also use steam to open your pores and help your skin absorb the oil better.