How to Make Cold Process Soap with Lye | Hello Glow
9. Put the mold somewhere warm (like in an oven with the light on), and let it sit for 24 hours. 10. After 24 hours, pop your soap out of the mold and cut if needed. Stand the bars up in a dry area with space in between each one to allow for air circulation. Let them sit for 46 weeks to let the soap finish hardening.