How to Make Liquid Soap (with Pictures) - wikiHow Life- training materials for liquid soap making ,You can make liquid soap from any bar of soap you have around the house. Use whatever leftover or half-used bars you have, or put some extra thought into your choice to create a liquid soap you can use for a specific purpose. For example: Use a bar of facial soap to make a liquid soap you can use on your face.Training Manual for a Village Soap-Making Operation ...Making Liquid Soap. Liquid soap is made by slow boiling oils, alkali and water. It is not as demanding a product to a make as traditional Alata soap because 1) while it is cooking, other projects can be accomplished and 2) errors in alkali balance can be easily rectified by adding any of the three basic ingredients.