OldPerry
Forum Replies Created
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@Tattvas - you have to use a silicone that is not water soluble and will plate out on the hair during use. This is how 2-in-1 shampoos work. They use Dimethicone, not water soluble PEG 12 Dimethicone.
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There’s not really a good answer to your question because it depends on your level of risk tolerance.
It’s just like asking “Do I need to wear a seatbelt when driving?”
There are plenty of times when you go driving and you don’t get into a car accident so the seatbelt was not really needed. But you should still wear one.
Similarly, you may be able to make your conditioner bar without a preservative and it lasts long enough without any problems. But you should still use a preservative.
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Try one of the Celluloses - Methocel https://www.dow.com/dowwolff/en/industrial_solutions/product/methocel.htm
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When in doubt, use a preservative.
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1. No a cationic surfactant can’t be used in an anionic surfactant system. Of course the PEG 12 Dimethicone will just wash away so it’s not doing much in your formula.
2. Possibly but you’d have to run a salt curve analysis. You have a number of ingredients in the formula that might negatively impact the salt thickening effect.
3. It is used to treat psorasis and dry scalp. I wouldn’t recommend using it in a general shampoo.
4. You can use as much PG in a shampoo as you like.
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There is the O’Brien book
Fats and Oil - Formulating and Processing for Applications. CRC Press
and the Firestone book: Physical and Chemical Characteristics of Oils, Fats and Waxes
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Your bar isn’t getting hard enough because the oils and sodium cocoyl isethionate are liquid at room temperature. You can’t substitute a surfactant for the lye and expect a saponification reaction to happen.
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@tarunj - perhaps your guar level is too high. What is the guar doing in your formula for you?
@ngarayeva001 - cationic surfactants and anionic surfactants when blended form individual, insoluble salts. A molecule of the cationic combines with one molecule of the anionic (+ to -). On a cationic polymer, there are multiple sites of a cationic charge and the molecule is giant. It can fold over on itself so many of the cationic sites are shielded from the anionic. There normally isn’t enough interaction to create an insoluble new molecule.
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@Fekher - no, microbes don’t prosper in oil. They need water to grow. But that’s exactly what they will get when someone dips their wet fingers into the product.
There is no reason not to include a preservative. It is safer with one. When you are making products for consumers, you should always err on the side of caution.
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If you want advice you’re going to have to list the entire formula.
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I’m not aware of any Coin Miner application on this website. Has anyone else noticed this?
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Vitamin E is not an antimicrobial preservative.
https://chemistscorner.com/vitamin-e-is-not-a-preservative-and-other-cosmetic-preservation-misconceptions/Yes, you should use a preservative especially if the product will have your damp fingers dipping in it. There is no good reason not to use a preservative. Phenoxyethanol or Propylparaben should work.
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@Majman - I’d suggest you start a new discussion for that question.
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I’d guess not but it would be a pretty simple experiment to find out for sure. I haven’t done that experiment.
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This is a really interesting mystery. It still amazes me he never got caught or found out.
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@Belassi - I agree the HA is a huge waste of money. There is some evidence it penetrates the skin but I’m highly skeptical of that research. Anyway, HA will not work better than the much less expensive, natural ingredient Glycerin. The only benefit of HA is that consumers think it works as a miracle anti-aging ingredient so it will be good for a marketing story.
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Lotioncrafter is motivated to get you to use and buy more of every ingredient they sell. You can assume all of the formulas on their site have more of most ingredients than you actually need.
5% panthenol is a ridiculous amount in any formula. My suggestion, use 0.44% or none. There will be no measurable difference.
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No, you don’t need to add anything unless you want to.
Of course, I think you could get the same results using a 5% solution of Glycerin plus a thickener and a preservative.
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The RH 40 version from BASF has a melting point of 20C. The RH 60 version has a MP of 27C. So, depending on your room temperature or the temps it’s been exposed to, it may be solid, liquid or a mix.
https://dewolfchem.com/wp-content/uploads/2013/08/cremophor_rh_tds.pdf
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@evenangel2018 - It would be easier to answer if you gave ingredient list examples of what you consider a good eyeshadow vs a bad eyeshadow.
@Sponge - I agree it is difficult to predict these things just based on ingredient list. However, the “may contain” claim is used to list colorants that may be used across the entire line. That way a company can make 1 label for multiple color options. There is nothing nefarious going on and companies are not trying to hide something when they do that.
@arachne013 - interesting link. I’m surprised they are encouraging people to make their own pressed powders. Without a proper press, you can’t make a good one.
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Panthenol doesn’t do anything in the formula either.
What is the % activity of those surfactants?
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I agree with @DAS Soap makes a terrible shampoo. Modern detergents are used because soap was so terrible to use.
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@ngarayeva001 - unless you are going to do the safety testing yourself, that’s probably a reasonable approach.
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Getting that effect also depends on the type of sprayer you are using.