How to Make Organic Liquid Castile Soap Without Lye

Organic Castille soap is often recommended for babies and individuals with sensitive skin.

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Castile soap is a mild soap made from vegetable oils. The soap, which comes in both bar and liquid forms, originated in Spain and was made exclusively with olive oil. Today, olive oil is often replaced or used in conjunction with other oils like coconut and soy when creating Castile soaps. Although Castile soap requires lye (potassium hydroxide) as an ingredient in its creation, a process called saponification converts the lye and vegetable oils into a new compound, resulting in a lye-free end product. To ensure your soap is organic, choose certified organic oils.

Related Searches:Difficulty:Moderately ChallengingInstructions Things You'll NeedBowlSpoonCrock potLarge potLarge stainless steel pot47 ounces organic olive oil32.9 ounces distilled water9.39 ounces KOH Flakes (potassium hydroxide)JugsSuggest Edits1

Turn on the crockpot and set it to the highest heat setting. Add the 47 ounces of olive oil to the crockpot.


Put on gloves and goggles. Add 32.9 ounces of the distilled water to the heat-safe container. Mix in 9.39 ounces of KOH flakes to the distilled water.


Slowly pour the KOH flakes and water mixture into the oil in the crockpot, using a heat-safe spoon to stir.


Stir the oil mixture off and on for about 90 minutes, until the mixture is so thick and rubbery that it's almost impossible to stir.


Lower the crockpot setting to medium, put a lid on it and let the mixture cook for 90 to 150 minutes, stirring every 20 to 30 minutes until all the soap is translucent.


Boil 1 cup of distilled water. Add a tablespoon of soap to the boiled water. If the water is clear after the soap dissolves, then the soap is done. Otherwise, continue cooking until a sample of soap in boiled water becomes clear.


Transfer the soap into a large stainless steel pot. Boil 80 ounces of distilled water in a separate large pot. Pour the boiled water into the soap and let it sit overnight to dissolve.


Transfer the dissolved soap and water mixture into jugs and let them sit for four weeks.

Tips & Warnings

To save money, substitute a portion of the olive oil with organic soybean or organic coconut oil.

Potassium hydroxide is a caustic chemical that produces heat when mixed into water. Always use protective rubber gloves and goggles when handling this substance.

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ReferencesBaruch College: Preparation of SoapSilver Fir Farms: Liquid “Castile” Soap TutorialMarti’s Soap: Can You Make Soap Without Dye?Organic Skin Care Pro: What is Organic Soap?ResourcesCenters for Disease Control and Prevention: Potassium HydroxidePhoto Credit Thinkstock/Comstock/Getty ImagesRead Next:

Print this articleCommentsmelissa.buksasNov 22, 2011The article speaks of making liquid castile soap without lye - but you recipe calls for potassium hydroxide which is just the chemical name for lye.Follow eHowFollow

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