Forum Replies Created

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  • OldPerry

    Professional Chemist / Formulator
    August 27, 2019 at 10:05 pm in reply to: Ceramides

    @Lindsey1009

    These data demonstrate that a proprietary combination of ceramide PC-104, palmitamide MEA, glycerrhetinic acid, and grape seed extract in a glycerin, dimethicone, and petrolatum vehicle was effective in reducing the signs and symptoms of mild-to-moderate atopic dermatitis and other types of pruritic dermatoses (e.g., senile itch, cosmetic intolerance syndrome) in children and adults.”

    In my view this is a pretty terrible study if they were looking to prove that ceramides were responsible for doing anything. It doesn’t prove that at all.

    Ignoring the small sample size (50 people), the test method only looked at with treatment vs without treatment.  The treatment contained ceramides but also other things including known moisturizers like Glycerin, Dimethicone, and Petrolatum. 

    The only thing this study can be used to prove is that applying a lotion to an affected area of atopic dermatitis was beneficial.  You cannot conclude from this that the Ceramides had anything to do with the benefit.

    If they wanted to show Ceramides specifically had a benefit, they would have treated 2 sites.  One site with a cream that had ceramides and another site that had a cream that did not have ceramides.  Then they could compare the difference. 

    This would have been such a simple test design and it would have been extremely persuasive if done this way and the results were in favor of ceramides. The fact that it wasn’t suggests to me that they probably didn’t get good results so they didn’t want to report that.  

    I suspect the study was funded by the makers of NeoCera™ who obviously have a stake in demonstrating their product is effective & remaining ignorant to whether the data supports other explanations.

    You could just as easily conclude from this study that Petrolatum, in combination with some other vehicle ingredients, was useful for treating atopic dermatitis. 

  • OldPerry

    Professional Chemist / Formulator
    August 27, 2019 at 7:59 pm in reply to: Biosurfactant help

    In the toner you don’t have a suitable emulsifier. Tea tree isn’t going to stay in solution & I doubt lime or orange will either. 

  • OldPerry

    Professional Chemist / Formulator
    August 27, 2019 at 4:47 pm in reply to: sodium surfactin. yes or no

    The ingredients in that formula are…

    INCI: Aqua, Coco-Glucoside, Sodium Coco-Sulfate, Cocamidopropyl Betaine, Glycerin, Disodium Cocoyl Glutamate, Sodium Cocoyl Glutamate, Sodium Surfactin, Helianthus Annuus (Sunflower) Seed Oil, Glyceryl Oleate, Hydrogenated Palm Glycerides Citrate, Sodium Chloride, Citric Acid, Tocopherol, Potassium Sorbate, Sodium Benzoate, Parfum.

    The ingredients that make this product work are Coco Glucoside, Sodium Coco-Sulfate and the Cocamidopropyl Betaine. 

    Sodium Surfactin isn’t doing much of anything in that formula. It’s probably in there at a tiny percentage (e.g. 0.2%)

    A “good” main surfactant is Sodium Lauryl Sulfate (SLS) or Sodium Laureth Sulfate (SLES).  Both of these are vegan.  An adequate main surfactant might be Decyl Glucoside or Lauryl Glucoside. But Sodium Lauryl Sarcosinate, Sodium Lauryl Taurate could also work. They don’t work as well but might fit better with a “sulfate free” marketing position. 

    But from a functionality standpoint, the “good” surfactants for shampoo are SLS and SLES (or ALS and ALES). 

  • OldPerry

    Professional Chemist / Formulator
    August 27, 2019 at 3:39 pm in reply to: sodium surfactin. yes or no

    Probably not.

    Are there any products on the market using Sodium Surfactin as a main surfactant?  I didn’t see any. 

    There is very little information available about sodium surfactin, but what is available says it’s only a secondary surfactant used at levels under 1%. 
    https://www.brenntag.com/media/documents/bsi/product_data_sheets/life_science/kaneka/kaneka_surfactin_brochure.pdf

  • OldPerry

    Professional Chemist / Formulator
    August 27, 2019 at 2:06 pm in reply to: I am looking to replicate the function of this hair product

    It sounds like a completely different formula.

    Without Styrene/VP copolymer you won’t get any hold.
    Without the silicone you won’t get much glide or shine

    Honeyquat and Varisoft essentially do the same thing so putting both in is a bit of a waste (except for marketing reasons)
    Tocopherol isn’t going to provide any benefit.  Rice ferment won’t do much

    Rice protein might provide some film forming or humectant effect but not as good as glycerin plus the Styrene copolymer.

    At this point, you’re not trying to copy the formula anymore. It might be better if you list what benefits you’re trying to get rather than a formula you are trying to copy.

  • OldPerry

    Professional Chemist / Formulator
    August 27, 2019 at 1:58 pm in reply to: Love the new website, Perry!

    Thanks!  My brother had actually designed it but passed away before he was able to fully implement it. I’m happy to have gotten it completed. 

    I’m still tinkering with the organization but thanks for the encouragement.

  • OldPerry

    Professional Chemist / Formulator
    August 27, 2019 at 1:17 pm in reply to: Colloidal silver or silver ion water?

    There are much better ingredients to use instead of silver for pretty much any personal care application.  For example, silver is not an FDA approved treatment for acne.

  • OldPerry

    Professional Chemist / Formulator
    August 27, 2019 at 12:27 pm in reply to: I am looking to replicate the function of this hair product

    If that is the case, you could probably recreate the product with the following ingredients

    Water
    Isoceteth-20
    Glycerin
    Dimethicone Copolyol
    Styrene/Vp Copolymer
    Disodium EDTA
    Citric Acid
    Phenoxyethanol
    (Plus ingredients to change the odor)

  • OldPerry

    Professional Chemist / Formulator
    August 26, 2019 at 8:40 pm in reply to: I am looking to replicate the function of this hair product

    What does this hair primer do?  How is it supposed to be used?

    It looks to me like it is a leave-in hair conditioner with some styling hold possible.

  • OldPerry

    Professional Chemist / Formulator
    August 26, 2019 at 8:35 pm in reply to: DIFFERENCE BETWEEN CLEAR HAND WASH,FACE WASH AND BODY WASH

    @Aziz - You may have misunderstood me.  The arbitrary numbers are the specific decimal points that you’ve listed.

    For example, you say a facial wash needs to have a pH of 4.5 - 5.5 but a hand wash should be 4.4 - 5.8.  There is no way you could possibly tell a performance difference if someone formulated a facial wash with a pH of 5.5 and another with a pH of 5.8 even though the claimed range is 4.5 - 5.5. These ranges are just rough guides. Not meant to be taken literally.  

    I agree you could probably tell a difference between a hand was at pH 8 and pH 5 (although I doubt most consumers would notice). 

    When you wash your hands you remove 92% of the resident bacteria so the pH doesn’t matter that much as far as the microbes go. See this study. https://www.dropbox.com/s/5zqzfjsbrf30hst/hand-washing.pdf?dl=0

    Here’s a paper that shows commercial shampoos range in pH from 3.0 - 9.0.
    https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4158629/  Claiming that it needs to have a range of 5.5 - 6.2 is not reflective of what the cosmetic industry is doing. It is just an arbitrary range written down by whoever wrote the textbook. It is not based on any science. If someone make a shampoo with a pH of 5.0, that’s perfectly fine.

    Just because people write things down in text books doesn’t mean those things are necessarily true or based on science. Most of the specific research on these things hasn’t been done. The pH ranges you see for products should only be thought of as useful guides. They are not scientifically validated. 

    Yes, it makes sense to keep cleansing products at a pH range of 4 - 6 (depending on the system) but anything more specific is mostly a fairy tale.

  • OldPerry

    Professional Chemist / Formulator
    August 26, 2019 at 6:08 pm in reply to: Colloidal silver or silver ion water?
  • OldPerry

    Professional Chemist / Formulator
    August 26, 2019 at 1:33 pm in reply to: DIFFERENCE BETWEEN CLEAR HAND WASH,FACE WASH AND BODY WASH

    Or there is no difference.  Certainly no major differences.  Really, these can be exactly the same formula marketed in a different way.

    For example, there is no scientific validity that a hand wash needs a pH range of 4.4 - 5.8 and a face wash needs pH 4.5 - 5.5

    These numbers are essentially arbitrary. Same with pH of shampoo and shower gel. 

    In fact, you could make a single formula and call it a body wash, hand wash, facial wash, or even a shampoo.

  • OldPerry

    Professional Chemist / Formulator
    August 23, 2019 at 4:31 pm in reply to: SLS downside to shampoo?

    It depends on how much you use and what else is in the formula. @sven is right, cocamidopropyl betaine can offset irritation. Some people use SLES in conjunction with SLS for the same purpose (offset irritation).

  • OldPerry

    Professional Chemist / Formulator
    August 21, 2019 at 3:50 pm in reply to: Emulsifier not working. Help.

    If you want a useful answer, please provide a list of all the ingredients in the formula. If you want a much more useful answer, list the percentages of ingredients too.

  • OldPerry

    Professional Chemist / Formulator
    August 21, 2019 at 2:25 pm in reply to: Citrus essential oils making anhydrous balm unstable

    To get a useful answer to the question you should provide a list of all the ingredients in the formula.

  • OldPerry

    Professional Chemist / Formulator
    August 19, 2019 at 7:55 pm in reply to: Capric/caprylic trigyceride VS glycerin - what’s the difference

    It all comes down to the existence of -OH (oxygen/hydrogen) bonds in Glycerin that are not present in Carpic/Caprylic triglycerides. 

    This is a vast simplification but in general molecules that have -OH groups tend attract water. Thus glycerin is a humectant.

    Triglycerides have no free -OH groups plus they have a large segment of carbon-hydrogen bonds. So, they do not attract water or behave in a humectant way like glycerin.

    When capric/caprylic triglycerides are made, the glycerin used to make them is used up in the chemical reaction. It no longer has any of the properties that glycerin once had.

    This is true of most any chemical reaction. Hydrogen is a gas and Oxygen is a gas but when you combine them to make water, you get a completely different molecule which behaves in a completely different way.

  • OldPerry

    Professional Chemist / Formulator
    August 19, 2019 at 6:25 pm in reply to: Hydrogen peroxide stability

    What was your whole formula?

  • OldPerry

    Professional Chemist / Formulator
    August 19, 2019 at 2:06 pm in reply to: Body Butters

    To make a 98% organic claim, you’ll need to get certified by the USDA. 
    https://www.ams.usda.gov/sites/default/files/media/Cosmetics-Body%20Care%20Products.pdf

  • OldPerry

    Professional Chemist / Formulator
    August 19, 2019 at 1:29 pm in reply to: Essence Evaporation in Dishwah Liquid!

    You need a more robust fragrance. It doesn’t sound like you have enough base notes & middle notes in the fragrance. 

  • OldPerry

    Professional Chemist / Formulator
    August 19, 2019 at 12:36 pm in reply to: cetrimonium chloride and polyquantarnium 7

    Cetrimonium Chloride is not the same thing as Polyquaternium-7. They are different molecules.

  • OldPerry

    Professional Chemist / Formulator
    August 19, 2019 at 1:39 am in reply to: Effectiveness of SPECTRASTAT G2-N Preservative in O/W Emulsions with Neutral pH?

    For the curious, the INCI name of spectrastat G2-N is Caprylhydroxamic Acid (and) Glyceryl Caprylate (and) Glycerin

    I personally don’t think it is a good choice for preservation. Others might disagree.

  • OldPerry

    Professional Chemist / Formulator
    August 19, 2019 at 12:30 am in reply to: organic, vegan anionic surfactant

    No cosmetic, natural or otherwise, is “good for you”.

    The cosmetic industry does not want to better define natural, organic, or synthetic. Brands want these terms to remain as vague as possible so they can claim whatever they want. For the most part, consumers will just believe whatever a brand they like tells them.

    For example, decyl glucoside does not exist in nature. It can only be made through a synthetic manipulation of an ingredient you get from nature. This is no different than a petroleum derived ingredient too.  But people have convince consumers that decyl glucoside is somehow more natural than sodium lauryl sulfate.

  • OldPerry

    Professional Chemist / Formulator
    August 19, 2019 at 12:24 am in reply to: Titanium dioxide with Castor oil

    What did you use to mix it?

  • OldPerry

    Professional Chemist / Formulator
    August 15, 2019 at 6:15 pm in reply to: Please advise on my dry mask formulation

    1. Sure - although you should use a vitamin C powder that adheres to some reasonable standards (e.g. https://www.gcchemicals.com/docs/AscorbicAcid%20-%20Spec%20Sheet.pdf)

    2.  Same answer as above. Find an hyaluronic acid source that has good specifications.

    3.  It’s unlikely any of the active ingredients will show a consumer perceptible, lasting effect so the amount you use doesn’t matter much. No one has ever tested these ingredients combined and delivered from a powdered facial mask.  So, you would expect three possible outcomes.

    a.  Skin is improved
    b.  Skin is made worse
    c.  Skin is unchanged

    The most likely of those three occurrences is C, skin is unchanged. 

    Product performance is not what sells masks. The experience of using them and the marketing of them is what sells masks.

    Consumers will believe whatever they want about their experience using the mask and it will have little relation as to whether it actually provided a benefit or not.

    My advice would be to make a formula with as little of each ingredient as you can and compare it to a formula using the amounts you listed above. On a blinded basis, I doubt you will be able to tell a difference.  I doubt even more that a consumer would.

  • OldPerry

    Professional Chemist / Formulator
    August 15, 2019 at 4:28 pm in reply to: Body Butters

    https://chemistscorner.com/cosmeticsciencetalk/discussion/5339/where-to-find-free-formulas-for-cosmetics#latest

    If you had some specific question you might get more helpful responses.

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