Superfatting means having more oils/fats in your soap than the specified amount of lye can saponify. However, this is not achieved by adding EXTRA oil. Instead, it is done by using slightly less lye in your recipe (this is known as ‘lye discounting’).
You can specify how much of a lye discount you want by using the slider in the calculator to go from 0%, right up to 20%. A slight excess of oil will give a soap that feels nice to use and is kind to the skin, while too much and you run the risk of oily, soft soap that turns mushy when used. There is no right or wrong number. If you are unsure then try starting with a percentage of 3%. You can adjust future recipes accordingly, but 3% is usually a good choice for a soap that is lasting and has a good feel to it.
How To Make Soap – Homemade Soap Making for Beginners
If You Want To Learn More About Cold Process Soap Making, Superfatting, As Well As The Other Key Techniques You NEED To Know In Order To Create Successful Soap, Then Check Out My Highly Rated Course…