letsalcido

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letsalcido
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  • What about a modified cellulose? HEC is used for thickening HCL toilet bowl cleaner, I think it could work? 
  • @RickS you didn’t mention which surfactants you are using. Only some of them respond well to electrolyte (salt) thickening.  If you share your formula, you can get more specific advise.
  • @Zara to make a clear product you need a solubilizer that yields super small micelles. Polysorbate 20 and PEG-40 Hydrogenated Castor Oil are the benchmark and will yield a clear solution at the right proportion with the EOs. If you can’t achieve a …
  • Solubilizers will give you a clear solution. But you’ll have to experiment with different ones (Polysorbate 20, PEG-40 Hydrogenated Castor Oil...) and ratios of solubilizer to essential oil, and make sure to first mix the two thoroughly before addin…
  • Glycerin, Propylene Glycol and Sodium Stearate? What kind of face care is this? Cleansing? Moisturizing bar?
  • I don’t think the outcome will be much different, it’s the ease of processing in most cases. You add amphoterics at the end because they will thicken the formulation and make it more difficult to process, potentially causing too much air to get tra…
  • To those that don’t speak Spanish, OP asked: what preservative should I use for an anhydrous product made with shea butter and apricot kernel oil? @Econatural deberías poner la traducción en inglés para que otros entiendan. Aunque sea de google tra…
  • Think of neutralizing that acid as a « saponification ». Like stearic acid with NaOH. You could technically get stearic acid to dissociate, but it will only be a small amount. If you saponify it, it will dissociate at 100%, and will have completely …
  • @Microformulation agreed for cosmetics. But I’m unsure that applies to professional or medical grade peels where an actual controlled “burn” is desired. Usually these kind of peels will come with very strict after care, and down time. That being s…
  • @Haleemah the peel that actually causes desquamation (100% of the time) about two days after is trichloroacetic acid. I do that every couple months and my skin does fall off in chunks :) it is not suitable for darker skin, however, because of high r…
  • If you post the ingredient list someone may be able to help better. My guess is that the product is actually an emulsion, and hyaluronic acid is in the water phase in the smallest possible amount for claims. But can’t tell without an ingredient lis…
  • @chemicalmatt thank you for that info. I’ll try HMC and see how that goes!  Didn’t mean to hijack the topic, I thought it could be related. 
  • @Perry makes absolute sense. The power of marketing is incredible. I did see recently a couple companies with kickstarters for new cosmetic products. Nothing innovative. One was simple castile soap, in a common aluminum bottle but with some cool ab…
  • @rseguin you can’t have a stable emulsion without the right surfactant. New Wash (a No-Poo) uses strong cationic surfactants (Dicetyldimonium Chloride, Behentrimonium Methosulfate, Stearamidopropyl Dimethylamine). Lack of foam doesn’t mean there is …
  • @chemicalmatt I have not been able to formulate a surfactant with HEC. At first I noticed I wasn’t letting it hydrate long enough. Then I thought I did (was heating it up to 75C and a couple drops of 10% NaOH, stir for 10min), and in a few occasion…
  • @rishabhsoti sure. What I said still stands, that you will not be able to thicken that percentage of anionic surfactant with salt. It’s too low. Like everyone else says, you’ll need a gum or polymer, but the skin feel won’t be the same.
    in handwash Comment by letsalcido August 6
  • @ngarayeva001 as someone that works in the tech industry (engineer by trade), this is everyday life. Non-technical people that have “the best ideas” are quite abundant and want you to work for free. I would say 1% of them are ideas worth considering…
  • Does cofounder mean lots of work for no pay? Why not hire a formulator? pay a fraction of what equity in the company would be worth when you’ve reached your first million in sales and were featured on Vogue magazine, then pocket all of the profits …
  • @Lilyprincess SCI should be fine I think. You’ll have to figure out how much you need by experimentation. But maybe 5-10% is a good start? I’ve never made a scrub like this one before. It will also depend on the skin feel you’re after. And yes, I w…
  • https://www.mdedge.com/dermatology/article/206178/contact-dermatitis/methylisothiazolinone-and-isothiazolinone-allergy I think targeting a company or product for using a compound that until recently was (seemingly) standard/widely accepted and gene…
  • They are safe in cosmetics. They’re widely used in the healthcare industry as well, and as preservatives in eye drops and antiseptic to treat minor wounds. There is no compound that kills living organisms and is not toxic. Ethanol, isopropyl alcoho…
  • Also, if we could magically dissolve 0.7% of unrefined jojoba oil in water by means other than micelle formation (which turns emulsions white), that amount of oil would not be nearly enough to make the full solution yellow. The oil is not that stron…
  • @Yulin I’ve used MAP (magnesium ascorbyl phosphate) and it’s an off-white powder. Once in solution it turns yellowish. I have tried other products I bought for testing that were made with SAP and they had similar odor and color characteristics as M…
  • Do you mean Alpha Olefin Sulfonate by AOS? Both SLS and AOS should be able to thicken with salt if at high enough concentration. Your powder is roughly: SLS — 72%AOS — 13%Borax — 2%Salt — 13% 10g of that for a total solution of 200g gives you 3.5…
    in handwash Comment by letsalcido August 5
  • There are several things that are not quite right with your formulations. The scrub: - First and foremost, I don’t believe it’s possible to make a stable emulsion with 62% salt. - Your water phase is smaller than your oil phase (~16% water phase v…
  • @Perry thank you for sharing that
  • @ozgirl good catch, I missed the benzalkonium chloride in there.
  • @chemicalmatt can you expand more on why is MEA the bad actor? And in such case, while Cocamide DEA is not unsafe, what are the things to consider when using it because of the residual free ethanolamines?
  • @Yulin the yellow comes from the SAP not the Jojoba Oil. And the milky white comes from the dispersed oil droplets with diferente refraction index than water. If you want a clear serum you’ll need a high amount of solubilizer (or some types of leci…
  • @tamicet glyceryl caprylate/caprate is easy to find and has similar function as the MG-60 you mention here. It helps (supposedly, I haven’t tried it myself) with thickening, foam stability and refattening in surfactants.
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