I just thought you should know that there is a form of Natural Soap that occurs as a herb. It generates a lather and can be made into cakes. Its great advantage is that it does not require any alkaline process to manufacture. It is called Soapwort and a full description and color illustration occur in Nicholas Culpeper's Herbal. The book is still in print and has been in print continuously for almost 500 years! Yet no one is utilising this marvel of Nature!