The best base oils to use for soap are saturated fats. They make the bar harder and last longer. These are usually solid oils that have to be melted before use, such as Coconut oil, Cocoa Butter or Palm Oil.
Then there are the unsaturated fats that can be added to the soap for their properties. Here are some examples of some:
- Sweet Almond Oil is a good moisturiser and skin conditioner
- Avocado oil is a healing oil. It is very moisturising and rich in Vitamins. It is an excellent oil to add to gentle soap bars for children, babies and skin conditions such as eczema.
- Castor oil gives the soap a nice foamy lather, it also attracts moisture to the skin and holds it there.
- Cocoa Butter is an excellent skin softener, helps to make the soap bar harder and holds the moisture to the skin.
- Coconut oil gives the soap an excellent lather but it should not be used as the majority of the oil in your soap as it could be drying to the skin.
- Grape seed oil is a nice, light, inexpensive oil that is easily absorbed into the skin so it doesn’t leave the skin feeling oily.
- Jojoba oil is the closest oil you can get to sebum, the oil that the body creates naturally. It is a very stable oil that conditions the skin and is an excellent emollient for all skin types. It expensive oil though.
- Macadamia oil is a lovely light, easily absorbed oil, it is another good emollient that can add a little luxury to your soap bar.
- Olive oil is a popular base oil for soap. It helps the skin retain its natural moisture as well as attracting moisture to the skin, leaving the skin soft and supple.
- Palm oil is one of the best oils to use in making soap. It makes a good, hard soap with excellent cleaning qualities while still being mild on the skin.
- Safflower oil works well in conjunction with other saturated oils to make a good moisturising soap.
- Sesame oil is considered effective in easing skin conditions such as eczema but should only be added in small amounts so that it does not make the bar too soft.
- Shea Butter has both moisturising and nourishing properties for the skin. It is an excellent ingredient to add to your soap as its properties are not destroyed by the lye. It also adds a lovely creamy colour to your soap.
- Sunflower oil is another inexpensive oil that has good moisturising properties and is high in Vitamin E.
- Wheat Germ oil is a heavy, nourishing oil, high in Vitamin E and good for skin conditions and mature skin.