Hi! and Congratulations on the new baby in the family!
While this used to be the case, it is no longer true if you make
Zany's No Slime Castile (aka ZNSC)
I agree. Use 100% olive oil (not EVOO). no additives, no fragrance, no color. If you follow the directions for ZNSC precisely, your Baby Mild Castile Soap will be ready in plenty of time for the baby's arrival.
Here's a video that shows how easy it is to make, and how soon it is ready to unmold and cut. NOTE: Andrea's batch is slow to trace because she soaped at
85°F. The directions are to use
100-110°F.
It's best to make the "faux sea water" ahead of time and store it in the fridge until ready to soap. Use it cold directly from the fridge to help the lye solution to cool faster.
I would recommend making a small trial batch first then make a large enough batch for you and your sister to enjoy as a gentle facial soap as well.
If using individual cavity molds you may want to take the necessary steps to "force gel" to make it longer lasting.