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tear free baby wash tip to toe
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The glucosides and betaine act like emulsifiers. I prefer PEG-150 (particularly crothix loquid) because you add it in the end and control thickness. You can add more until you are happy with the result. Carbopol is less predictable. Maybe I am not too experienced with surfactants but I personally find crothix easier to work with. BTW if you use anionic and amphoteric surfactants you don’t need a thickener. In this case amphoteric and non-ionic are used.
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@ngarayeva001 You refer to PEG-150 as if it is a material. Do you know what PEG-150 refers to? Just an initial search shows PEG-150 in the name of at least 48 different raw materials used in Cosmetics. -
@Microformulation, thank you for correcting me. It might really sound confusing. I was talking about PEG-150 distearate:
https://www.makingcosmetics.com/PEG-150-Distearate_p_303.htmland PEG-150 Pentaerythrityl Tetrastearate (Crothix Liquid by Croda).
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No problem. If you read up, the number relates to the average molecular weight of the ethoxylated compound. They are great products, but if you sell, any “natural” markets would balk at the PEG’s.
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PEG-150 distearate is useful but it has its limits, typically 1.5% in a shampoo, higher than that and you get a product that’s like plastic.
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Can you use PEG-150 distearate along carbopol (to thicken sulfate-free surfactant formulations, CAPB+glucoside), and are there any advantages or disadvantages in doing so?
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You could, if you wanted to change the sensorials from short to long flow.
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zaidjeber said:Way too much xanthan gum, oils, sodium benzoateWay too little surfactant (not good choice of surfactnts too)if you want tear free, keep the pH 7
Hi,
is the PH level main factor to avoid tea free shampoo or are there other ingredients that when above certain level cause tears ? If there are other ingredients, can you give please some examples ?
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No, pH isn’t the only factor you should use amphoteric surfactants to make product tear free. Obviously ingredients such as essential oils have to be either excluded at all or uses at a very low %
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ngarayeva001 said:No, pH isn’t the only factor you should use amphoteric surfactants to make product tear free. Obviously ingredients such as essential oils have to be either excluded at all or uses at a very low %Thank you. Amphoterics are the secret. There are numerous starting Formulas on Tear-Free Baby Shampoos, especially some ones from BASF.
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@Microformulation I am learning:)
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Just this week I have heard this same claim from a line assigning “tear free” to pH incorrectly. Another favorite which you will see eventually is “they add novacaine to the shampoo.” It is so much simpler and elegant in the Chemistry and the surfactant classifications.
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Wow! It’s just beyond nonsense. I wish novocaine worked this way. Would be great for painful aesthetic procedures such as hair removal ?
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dear all, expect the claims you can read on labels, as any of you see a proper scientific paper (S) testing surfactants…. to support the tear free claim? Of course not the unfamous Draize test!
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I’m surprised that anyone is still using the Draize Test (and methodology - animal testing) for tear-free claims. Most are now done on human volunteers and evaluated by participant responses and ophthalmologist evaluation.
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I read about many test available, but I am having hard time to find any good study to support the tear free claim.
I did not realize that humans were the new rabbits! LOL -
If you, still, feel drying, there are several moisturizing agents in the Raw Material Market. If you prefer Natural Moisturizer, you may use sodium PCA, Hyaluronic Acid, or Squalene. This is if you like to stay away from the moisturizing Oil Blends.
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Test on humans save the rabbits! Jokes aside I agree, some things can be tested on volunteers.
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We have used HET-CAM as our standard test for ocular/corneal irritation test. http://www.mbresearch.com/hetcam.htm
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I don’t think you will ever find a study that will “support” the tear free claim … this is really more appropriately a “non-irritating” claim … but, when you’re eyes are subjected to an irritant, you tear to wash the irritant from the eyes. It’s really only a matter of your test panel noticed irritancy, stinging, burning and tearing and to what degree or not.
Rabbits, btw, do not have tear ducts … so they never were a good model. The type of test used depends on the type of product you’re developing.
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Thanks all for the valuable comments
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