So here’s the next installment of our deep dive into the nitty gritty of shampoo bars:
What do you find are the pros and cons of different oils when making a shampoo bar? What about olive vs. coconut oil? Also, do you think it likely that castor oil would cause build-up?
| It depends on what all of the oils are that are going into the soap and what percentages they are in and thus how they will interact to make the soap. (I’m using the term soap interchangably with shampoo here.) Darn near every single soap that I make has both olive and coconut oil in it so I think that they are both good oils. The issue is the percentage that you use. Olive oil is the only oil in a pure castile soap. It’s the best soap for babies and those with sensitive skin. However, while it will clean you it’s not going to cut grease or suds up like a soap that is made from coconut oil. An all coconut oil soap would be great for washing clothes or dishes etc. but you wouldn’t want to use it on your body because it is way to harsh by it’s self. A soap that has both (so long as there wasn’t too much coconut) and maybe some other oils however would make a great general use soap. So you have to know the purpose of the soap and how the oils will interact with each other when putting together a recipe. I am not aware of castor oil being more likly to cause build-up. Usually castor oil is added to add a little bubble power to a bar of soap above and beyond what the coconut oil will give you. Castor oil is great as an added oil and is in almost all of my soaps. It is great for conditioning and yet creates a nice bubbly lather without drying the skin. Merna, Baby Bird Bath Works
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Different oils have different properties for sure. Coconut oil will make a wonderful lather, but too much may be drying. Olive oil in my opinion is natures greatest creation, a plain castile bar will leave a protective layer on your skin, yet allow it to breathe as well. Castor oil alone may cause a build up, but used in a shampoo bar castor oil is a fabulous humectrant and will rinse away. I’ve also read somewhere that castor oil promotes new hair growth and prevents hair loss. HeatherRai, Beautiful Soaps
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Well Olive and Castor are wonderful for attracting that moisture so many of us need. Olive oil also does not inhibit any of the normal skin processes we need to accomplish , such as shedding dead skin cells or even sweating, so this is why it is the largest percent of my soap blends. However by itself, the lather is pretty low and also the soap is pretty soft. Coconut oil can be pretty drying if too much is used, but it sure helps with lather and hardness so I love using it. Some oils have an extremely strong smell, such as that fair trade shea I was discussing earlier. Castor can be strong as well. So, I think each soapmaker finds what they love and works with it. Following your heart and finding what you love to work with I think is what each of us goes through as soapmakers, and choosing the oils is part of that for us all. So many oils are beneficial, and each of us are unique in our product and choose what we are drawn to. Kristena, Dreamseeds Organics
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When making a shampoo bar I look at creating a hard, long-lasting, soap that lathers well but is not drying. I also look at oils that are known to be good for hair. For example hemp oil and castor oil are known to be good for your hair. I’ve stopped using coconut oil because I personally found it drying. I replaced it with Palm Kernel oil. It gives the same benefits of coconut oil (hard bar with lots of lather) but I find it less drying. Also, olive oil is always a great choice in soaps and shampoo bars. However it doesn’t create a high lather soap on its own. So it’s all about balance in creating the best bar possible. I’ve found castor oil to be a wonderful addition. I use a fairly high percentage of castor oil because of it’s lather-boosting properties. I have not found it to cause build up (at least in my shampoo bar).
Amanda, Dragon’s Den
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