ngarayeva001
Forum Replies Created
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Pat McGRATH’s lipsticks have the most dense coverage I have ever seen.
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I get surprised when I see glucosides in leave in moisturizers. Usually they are listed after 1% line but it’s strange to see, say coco glucoside, in a luxury Japanese moisturizer.
Thank you for an article, Perry. -
Vitamin C serum (LAA?), AHA peel, BHA peel are all supposed to be low pH products. PE 9010 doesn’t perform well under low pH.
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Face wash should be formulated with 8-10% of surfactants. You can’t make a bar product with such a low concentration of surfactants. Experiment with stearic acid as a filler I guess.
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Up!
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INCI % Sodium Lauroyl Methyl
Isethionate (power)44.0% Sodium C14-16
Olefin Sulfonate (powder)35.0% CAPB 17.0% Sodium Lactate 3.0% Germaben II 1.0% An example of sulfate-free syndet. Swiftcraftymonkey has more interesting formulas.
Disclaimer: nothing is wrong with sulfates. This is just something I am working on now. The purpose is to give you an idea about the proportion of dry ingredients. -
What is in your formula?
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Never use a microwave for making personal care products. Get a thermometer as well. You shouldn’t overheat certain ingredients. Behentrimonium will melt around 65-70C and your water phase should be the same temperature.
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You are lucky it didn’t explode! Behentrimonium chloride is oil soluble. Melt it in the oil phase on a water bath.
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I use dimethicone in many formulas and I don’t think you need any special effort to stabilise 3%. Just think of it as oil
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@Fekher, what’s your concern with dimethicone?
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@Perry, I supposed it might be an emulsifier in this formula because it’s concentration is too high to be a neutraliser only, there’s stearic acid in the formula, and glyceryl stearate alone wouldn’t be sufficient as an emulsifier. TEA-stearate is used surprisingly often notwithstanding of the high pH.
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Is TEA used as an emulsifier here?
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My advice is to get a Shampoo Bar e-zine from swiftcraftymonkey. She explains in details how to make syndet bars of all kinds.
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50% citric acid solution would have a pH around 1. you don’t need to preserve it. Just fill a little bit more than a half of a dropper bottle with citric acid powder, top up with deionised water, shake and you are good to go.
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I would disagree @Gunther. If time isn’t an issue I think it’s worth it to take chemistry course. Yes we don’t react chemicals but I messed up a lotion based on Aristoflex by adding magnesium ascorbyl phosphate to it. I read the datasheet and knew it’s not electrolyte resistant, but due to lack of chemistry knowledge it didn’t come to my mind that magnesium is a salt. So, chemistry is very helpful. Having said that knowing chemistry and being able to formulate skincare isn’t the same.
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pH is a quantitative measurement of acidity and acidity is a qualitative measurement of acidic properties of a solution. Citric acid is an AHA but it won’t do anything under a neutral pH, which is what, I believe, you are trying to achieve.
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Skin of most of the people doesn’t tolerate pH below 3 well
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I often see sodium benzoate and potassium sorbate in peels and acid toners with pH below 4.
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@Bill_Toge, this is a very interesting point.. what about carbomers or addition of small amounts of polymeric emulsifiers (for example Aristoflex) as a rheology modifier?
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Agree with Bill_Toge. Dove is a syndet bar, not a soap. If you want to make a low pH bar without decreasing pH, use SCI, SLSa and CAPB as your surfactants. This combination would have a pH around 6. If you want it to be sulfate free (although SLSa is rather mild) replace SLSa to powdered olefin sulfonate, but that type of bar takes a while to harden.
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If you lower pH of a soap it will stop being a soap. It will separate.
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Castille soap is a soap. It had a high pH and is an old fashioned drying product. Also soap isn’t great for dish washing.
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I haven’t worked with this emulsifiers but both sodium pca and sodium lactate are high in electrolytes. They often cause loss of viscosity. Replace with glycerin and see how it works. Also add carbomer or a natural gum for stability. If you are interested in making lotion with sodium lactate/pca use glyceryl stearate/PEG100 stearate.
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You need to start a nee discussion and show % not grams. And INCI names not ‘conditioner’