ketchito
Forum Replies Created
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Optiphen messes up with the viscosity of some emulsions. You could change your preservative if you want. Gums can also give not a pleasant look to emulsions. You could replace it by modified starches of just remove it and increase your fatty alcohol and btms.
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Decyl glucoside might not help you build good viscosity. If you still want some glucoside, shoose coco glucoside.
Also, I don’t see something to give lubriticy to hair, so an ester or silicone (I believe you might not be a fan of those) is required.
Could you elaborate more on this: “biologically active ones that have an effect on oil products”?
Also, your preservativos system might not give enough protection.
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I agree with @PhilGeis . Choose carefuly your sources and read with critic eyes. That journal has a very low impact factor (ca. 0.1). This is not a perfect metric, but it will help you filter papers.
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As other members mentioned, reduce those three ingredients to claim levels (0.01% for example). None of them have any real effect from a shampoo.
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The reacción is available online in few places. Now, Just as a reference, that reaction require very specific conditions that are not that common in cosmetics. I remember that phenomenom was found in some drinks which have a very low pH. So be careful to understand first the chemistry behind it.
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Big companies have very efficient mixing equipments, so dispersing powders like this is not an issue. Yes, big companies (that I know of) buy the powder version, both for price (it’s cheaper) and for shelf life (aqueous versions last less).
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If you’re formulating hair care products, please be careful about using high amounts of non ionic surfactants. There was a case in Brazil of severe eye issues of people that used styling hair products with high amounts of ceteareth-20, which due to sweating, reached consumers eyes (https://www.gov.br/anvisa/pt-br/assuntos/noticias-anvisa/2023/pomadas-capilares-anvisa-define-produtos-que-poderao-voltar-ao-mercado-1#:~:text=O%20Ceteareth%2D20%20%C3%A9%20amplamente,de%20mais%20de%20600%20processos
gov.br
Pomadas capilares: Anvisa define produtos que poderão voltar ao mercado
Agência autoriza a volta de uma lista restrita de pomadas capilares ao mercado. Investigações seguem com foco nos produtos relacionados aos eventos adversos graves.
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In the case of your perfume, do you use colorants as in your other products? Do you also perceive bad olor?
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I love MBBT but I would never use it alone, mainly because of price. I use it as a stabilizer (EHMC thanks you for that) and SPF booster. Hopefuly you’ll have enough UVA coverage with only 2% of your UVA filter. Where are you planning on selling this product? Last I remember, MBBT wasn’t approved in the USA as UV filter. Also, there’s a UVB/UVA ratio now with the New las you have to fulfill.
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It feels like Deja vu, hehe. Both CIR and Scientific Opinion of the EU are reviews of evidence, usually leaving out very weak studies. I won’t add any since I did last time, If I remember correctly. I also attached Unilever’s patent of a syndet bar which was shown to be milder than regular soaps. I’m attaching now a few screenshots:
1) one from the 2nd world conference on detergents, where they found that in a tallow/cocoate based soap bar, the more cocoate you had (similar to the type of oils from vegetable sources), the more irritating the bar. Both bars were more irritating than a mild synthetic bar (control).
2) one from a very nice book “Surfactants in personal care products and decorative cosmetics”, where both SDS and Na laurate scored the highest in the Zein test (ability to denature skin proteins).
3) one from the book “Surfactants in cosmetics”, where it’s shown that an isethionate bar is milder than conventional products containing SLS or soap.
The point is that there newer and more effective technologies than standard soaps, to make milder products. Actually, the “soap chamber test” takes the name from soap since it was designed to assess the irritancy of soaps.
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Can you please cite your references and what you mean by “toxic” impact? The most comprehensive and authoritative reviews on the topic (CIR and the Opinions from the Scientific Commitee of the EU) show how soaps (like sodium or potassium cocoate) underperfom in dermatological, ocular and different other tests, if you compare the same reviews done for SLES, sulfosuccinates, etc. The difference of course is not gigantic, but was relevant enough to prefer synthetic surfactants in personal cleansing systems.
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Another possibility is that you have an alkylbenzene sulfonate (NANSA), which was formed by neutralizing a type of sulfonic acid with sodium hydroxide. This results in an equilibrium. Since water is part of the products, by adding water (dilution), the system will reform the acid, which is less soluble than is salt. Also, some flagrantes are not stable in acid environments (that might be your foul odor). Check the pH of your 2 year bottle, to see if the pH dropped.
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Hi! It might me the case that your system is sensitive to high amounts of electrolytes. Try making your product without Sodium chloride to see if you still have the issue (if you need more viscosity, you can use Cocamide DEA, PEG-4 Rapeseedamide, Crothix Liquid, or a similar ingredient to build viscosity).
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If mildness is your only requirement, then ethoxylated are always better. Now, formulas are not solutions of a sole ingredient, and you can make a surfactant like SLS milder by mixing it with an ethoxylated anionic (like P&G have done for years), with an amphoteric (like CAPB), or with polymers (like PQ-10).
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Sorry, I didn’t fully get your question. Since you’re making a lotion, I’d use a non neutralized carbomer instead, since usually the emulsion process takes time and high shear. If you have no other choice, then reduce your emulsion time, but check through stabilityvtesting if it was enough to give you good stability.
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You can and should incorporarte carbomers in your water with high mixing. At these stage, there’ll be no significant impact on their structure. Once neutralized, you can only mix with high mixing, very shortly.
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There are ways to calculate these parameters as part of the design. If you’re not familiar with this, you could make small samples at different speeds and mixing times, measure their viscosity, and put them in the oven to see how stable they are.
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What are you using instead of Mineral oil, hydrogenated polydecene, etc? Maybe you can tell us what your ingredientes are (without percentages), so we can check what can be causing the olor.
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Polysorbate-20 is not a lipophilic emulsifier. I advise you to check on some similar products on the market, patents and some books to understand how to make that type of emulsions. To me, multiple emulsions don’t have a very different feeling than conventional emulsions, but they would help you for instance, protect sensitive ingredientes from oxidation.
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If you want to create a W/O/W by shaking, you need to apply same principles as for a bi-phasic product. Which solubilizer are you using in the water phase of your second emulsión? Also, you need some salt also in the water phase.
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Just out of curiosity, are you first marina a W/O (with the corresponding type pf emulsifiers), and then adding this to an O/W emulsion?
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No worries. For a face wash, I’d only add a low % of either polymer. Try how it feels at 0.1% (active matter).
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I think you should have a different approach. If you want your product to perform, you need to start with the basic principles of detergency, type of substrates, detergent-substrate interaction, etc. You could then check what big guys in the marketing are domingo in terms of formulation (they for sure follow those principles I mentioned). Then, understanding all that, you could think about replacing some materiales for more natural ones and compare if they still perform or not. Doing it the other way will only result in an underperforming product with a good marketing story.
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Yes, that ratio is based on active matter. And even though each system is different, you could use that ratio as a reference. Good luck with your tests!
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You mighr be experiencing two different issues at the same time: color loss due to dye oxidation (for this a UV filter is needed), and product contamination (review your preservative system).