Quick Answer
Infused oils can be used for scent in soap, but they may not provide the same intensity of fragrance as essential oils or fragrance oils. This is because the infusion process can dilute the natural aroma of the herb or spice. However, infused oils can add a subtle, unique scent to soap.
Choosing the Right Infused Oils
When selecting infused oils for scent in soap, consider the strength of the infusion. For example, a 1:1 ratio of herb to oil (such as calendula petals to olive oil) may not provide a strong enough scent. A 1:4 or 1:6 ratio can result in a more pronounced fragrance. Also, choose oils that are suitable for soap making, such as sweet almond oil or jojoba oil.
Infusing Oils: A Step-by-Step Process
To create infused oils, combine herbs or spices with a carrier oil in a clean glass jar. Store the jar in a cool, dark place for 2-6 weeks, shaking the jar every few days. For example, to make a calendula infused oil, combine 1 cup of dried calendula petals with 1 quart of olive oil. After 4 weeks, strain the mixture through a cheesecloth or coffee filter into a clean container. Discard the solids and use the infused oil in soap making.
Using Infused Oils in Soap Recipes
When using infused oils in soap recipes, start with a small batch to test the fragrance and color of the soap. Begin with a small amount of infused oil, such as 10% of the total oil weight, and adjust to your liking. Be aware that infused oils can affect the lather and hardness of the soap, so you may need to adjust the recipe accordingly. For example, if using a very strong infused oil, you may need to add more lye or adjust the water content to achieve the desired soap properties.
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