20 BEST Essential Oils to Scent Handmade Soap Naturally ...
Jan 24, 2018·Essential oils for Soap Making. The EU considers an essential oil usage rate of 3% or less to be safe in wash-off products like soap. For clarification, that 3% of the total amount of soaping oils in a soap recipe by weight. 3% of a one pound batch of soap is a total of 0.48 ounces or 13.6g.