Single Oil Soap – Castor Oil – Day 2 5

Today I wanted to make the castor oil soap with no volcano. How does that sound? I am pretty excited to see how it turns out. Let’s head to the test kitchen and make sure our thermometer is handy!


To be on the safe side, I decided to not heat the castor oil and just leave it a room temperature. When I tested the temperature, it showed to be 69° F. I mixed my lye solution and gave it time to cool. When I went to mix my soap, the lye was 96° F. I didn’t have any volcanos or temperature problems. Yay! I love it when things work the way they are should!


I learned that castor oil is a temperature sensitive oil when making soap. Even with the much cooler temperatures, when I reached trace, it was like a thick pudding after having been chilled. I poured the soap into the mold. Later when I washed with the finished soap, I liked how creamy and smooth it felt but there weren’t any suds. One thing I have noticed is many people relate the amount of suds with how clean something is.

Needed Materials

Castor Oil
Microwave Safe Container
Immersion Blender


Recipe in Grams
454 grams Castor Oil
55 grams Lye
177 mL Water
Recipe in Ounces
16 oz Castor Oil
1.93 oz Lye
6 oz Water
Recipe in Percentages
100% Castor Oil
Q.S. Lye
Q.S. Water

Weigh the Castor Oil into a container. Heat until warm. Add the lye to the water to for a lye solution. Allow the lye solution to cool. Mix the oils and lye solution and blend until trace is achieved. Pour into a mold and allow to sit for 24 hours. Enjoy!



Finished Soap

Adding Lye Solution to Oil

Mixing Oil and Lye Solution

Mixing Oil and Lye Solution

Mixing Soap

Soap in Mold

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Rating: 5.0/5 (2 votes cast)
Single Oil Soap - Castor Oil - Day 2, 5.0 out of 5 based on 2 ratings
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About Taylor

I'm a twenty something happy, animal loving, curious experimenter. I love reaching back into history and trying old recipes for cosmetics or foods. I'm constantly asking "Why?" My curiosity has me trying new things. I love taking walks with my dog as well as staying at home to cuddle with the dog and my cats. Some of my favorite scents include Hinoki Wood, Rose Garden, Jasmine and Gladiator.

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5 thoughts on “Single Oil Soap – Castor Oil – Day 2

  • Madea

    Other than the lack of suds, how did your hands feel after using? Coated like they needed to be washed again? Or clean, just no suds?

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    • Taylor Post author

      My hands did feel clean but they also felt like a slight film had been left on them. It was hard to notice though.

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      Rating: 5.0/5 (1 vote cast)
  • Linda

    I am enjoying your experiments and learning a lot from you. Keep up the good work!


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  • Sonya Mounts

    I’m curious whether the bubbles will increase as the soap cures. Can you give an update? I use castor oil in my soap (along with other oils) especially for bubbles and because it makes the soap seem so smooth. Do you think a higher temp of the castor oil would have resulted in more bubbles? (I always do room temp).

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    Rating: 5.0/5 (1 vote cast)