Preparation method and formula of ancient soap

Ancient soap was made of lard, plant ash, spices and water. First, the lard is heated until it melts, and plant ash is added and stirred evenly. Then, add an appropriate amount of water and continue stirring until the mixture becomes sticky. Then, add spices and stir well. Finally, the mixture is poured into a mold, cooled and solidified, and can be used. Lard has decontamination ability, and plant ash contains potassium carbonate, which can be saponified with lard to form soap. Spices add flavor, and water adjusts consistency to make soap more delicate.