Quick Answer
Olive oil can be used in cold process soap, but it's not the best choice due to its low saponification value and potential for soap to be too soft. Olive oil can contribute to a good lather, but it's best used in combination with other oils.
Choosing the Right Oils for Cold Process Soap
When it comes to cold process soap making, the type and combination of oils used can greatly affect the final product’s characteristics. Olive oil, in particular, has a low saponification value of around 0.112, which means it requires a higher percentage of lye to fully saponify. This can lead to a soap that’s too soft or even separates over time.
Working with Olive Oil in Soap Recipes
If you still want to include olive oil in your soap recipe, use it in combination with other oils that have higher saponification values, such as coconut oil or palm oil. A general rule of thumb is to limit olive oil to 20-30% of the total oil weight. For example, a recipe with 50% olive oil, 25% coconut oil, and 25% palm oil would be a reasonable starting point. Be aware that using high amounts of olive oil can lead to soap that’s prone to separation or softening over time.
Alternative Oils for a Better Soap
If you’re looking for a more reliable option, consider using other oils that offer a good balance of hardness, lather, and moisturizing properties. For instance, using a blend of coconut oil, palm oil, and castor oil can produce a soap that’s hard, lathers well, and has moisturizing properties. Experiment with different oil combinations to find the perfect balance for your needs.
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