The "Hot Process" refers to a method of making soap where the ingredients are heated during the saponification process. This technique involves cooking the soap mixture, which accelerates the chemical reaction between fats and lye, resulting in a finished product that can be used more quickly than cold process soap. In hot process soap making, the mixture is typically heated in a slow cooker or pot, allowing for a more controlled environment. This method often results in a rustic appearance, as the soap can be poured into molds while still warm, creating unique textures and designs.