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Formulating shampoo bar help
Hello!
Ive been working on a shampoo bar formulation and for my tests Ive been consistently using about 30-35% SCI powder. However this new bag of SCI that I have says that is SCI - 85% and the website says the useage rate is 3-20%. That seems low? Im not sure how to reformulate to account for this.
I hope this makes sense! Thanks!
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7 Replies
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@chrystad72 not clear your request can you be more clear in your question?
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Of course! For my original formula Ive been testing, Ive been using SCI 35% and SLSa at 30%.
The new SCI I just bought states that the recommended useage rate is 3-20%. So could I just add the 15% to the SLSa? That would make the new totals
SCI: 20%
SLSa: 45%Let me know if that clears it up a bit. I just was unprepared for the low useage rate on the new powered SCI that I bought so I need to reformulate a bit to account for this.
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That is only a recommended usage rate and probably a guide for liquid products. Ask your supplier if they have a recommendation for solid bar products.The Cosmetics Ingredient Review concluded that sodium cocoyl isethionate is safe for use in rinse off products at up to 53%.Hope this helps. -
The Cosmetic Ingredient Review (CIR) deems SCI safe to use up to 50% for rinse-off products, so your original formula should be fine.
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@chrystad72 i’am totally agree with @ozgirl I guess the level of use mentioned is not for all products and I guess you should work with used level to have your ordinary product.
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@chrystad72 CIR has regulations for liquid surfactants shampoos and liquid cationic surfactants for conditioners, but there are no regulations for surfactants and cationic surfactants for solid products which is a problem. When you use a shampoo bar or a conditioner bar, they are more concentrated, but it does not mean the exposure is any different, since when you use a bar you use a lot less product to begin with. This is something I found to be problematic. Regulations need to address this challenge since disposable plastic bottles will eventually be banned. Hotel sizes have already been banned in California, but this is just the beginning.
https://www.forbes.com/sites/grantmartin/2019/10/13/california-bans-single-use-plastics-in-hotel-rooms/?sh=1b2d60eb782e -
oh that is a really interesting point! I never thought about usage rate for liquids but makes sense. Thanks for passing that info along.
Now that Im thinking about it, in general would the ASM % affect the usage rate at all ? Im just curious now. Thanks again for the help!
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