This is the recipe I used for shaving soap.
Olive 190 gm
Coconut 144 gm
Palm 129 gm
Castor Oil 37 gm
Lye 71.40 gm
Water 160 gm
2 Tablespoons of Bentonite Clay
I decided to make this in a small batch so I used Grams instead of Ounces. What I will do next time is allow the bentonite clay to sit in some of the water overnight and add it at trace. This will allow the clay to fully hydrate. Also, I think I will try putting in more castor.
NanaKat,
I was fooling around on SoapCalc with your idea of shaving soaop made mainly with Shea Butter. Enter these values and see what you think of this:
Shea 50%
Coconut 25%
Castor 25%
Add your Vitamin E at trace as well as your soaked bentonite clay.
It looks like it would have good conditioning as well as bubbles and hardness. Given the oils it would probably last forever.