“Instructions for Basic Bath Salt Combine 3 cups salt (either Epsom or Dead Sea or Rock Salt) with 30-60 drops of your favorite essential oil in a large bowl (preferably ceramic or stainless steel, as plastic absorbs essential oils). Mix well. Then place in your storage jars. You may also add in ½ cup of baking soda, if you wish to use it as a water or skin softener.”
―
Kimberly Jones,
Aromatherapy and Essential Oils for Beginners