I hot process my soap. This means that I cook my raw soap in the oven then pour it into a mold to cool. I like to do this because I don't have to wait 4 weeks to use my soap, I can tell right away if my soap is lye heavy or has some other catastrophic flaw, I can use less fragrance per batch and my cleanup is much much quicker than cold processing. I can swirl, marble or layer my soap. I just can't get whispy swirls or sharp details.Here is a video showing my process.