Why is Nanna essential oil soap called ancient soap, cold soap and ordinary soap? What's the difference between them?

There are many kinds of handmade soaps in Nanna, and most of the raw materials are imported from essential oil soap and Nanna. Then part of it is our patent, so we can't just give this formula to the factory, so the cycle will be longer. Most importantly, our Nanna soap is handmade from mixing, cutting to drying. The period of ordinary soap is 15 days, while that of ancient soap is 35 days.