freemotion
Food Guru
Here's another way of saying the same thing: The reason we use the calculator is so that ALL of the lye will react with ALL of the oil. If there is too much lye, the soap will be harsh and caustic, drying out your skin. If there is too much oil, the soap will be greasy and the unsaponified oils will go rancid, as they will if left at room temperature for a long time.
Exactly the right amounts of lye and oil will make perfect soap. You can get away with a little extra fat, which is what lotion is made of....so the soap will be milder and even moisturizing. This is called superfatting.
If you want to add essential oils for fragrance, you add them at the end of stirring, so that they DON'T saponify, and their fragrance will remain in the soap. It is during the stirring that the molecules of oil combine/react with the molecules of lye and saponify, or become soap.
Make sense?
Exactly the right amounts of lye and oil will make perfect soap. You can get away with a little extra fat, which is what lotion is made of....so the soap will be milder and even moisturizing. This is called superfatting.
If you want to add essential oils for fragrance, you add them at the end of stirring, so that they DON'T saponify, and their fragrance will remain in the soap. It is during the stirring that the molecules of oil combine/react with the molecules of lye and saponify, or become soap.
Make sense?