1. Prepare the required raw materials, including soda ash, milk, essential oil and lard.

2. Add baking soda powder to the milk and stir while adding it.

3. Add the mixture of milk and soda ash into lard and fully stir until there is no oil layer.

4. filming. Put the mixture into different shapes of films and wait for about three days until it dries and forms.

5. The formed soap can be used.