OldPerry
Forum Replies Created
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Try coconut oil.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4387693/ -
@Bios - it wouldn’t be effective for most formulations. Depending on the type there are also safety concerns when applied to skin.
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It’s gone onto a second page. You have to click to the first page. Here’s the link.
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You only have to weigh the amount of phenoxyethanol. So, weigh 0.9 grams.
You only have to consider density when you are measuring in terms of volume. Using a scale is measuring in terms of mass.
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Perfumery is a field of study that takes years to learn. Usually it’s done under an apprentice type situation. Mixing your own fragrances is not easily done. Most companies just buy finished fragrances to use in their products.
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For Cyclomethicone you could go up to 2%. For Dimethicone it would be more like 0.5%
Cocotrimonium Chloride at 0.25% could work too.
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Silicones. Dimethicone or Cyclomethicone.
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No need to convert solids to liquids. Mass (at least when you’re not moving close to the speed of light) is constant.
Weigh all your ingredients. Add up the weight. Then divide the Amount of Ingredient by the amount of all ingredients to get the relative percentages.
All the percentages added together should equal 100%
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@MarkBroussard - possibly, but I’d guess they ran the test at different levels and the only one that came out with compelling marketing results were the 2% ones. Studies published by raw material suppliers shouldn’t be considered science. At best, they are directional information.
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I’ll just weigh in on the “Natural” claim. I believe it is ok as long as you don’t say “all natural” or “100% natural” based on that FTC action @Microformulation pointed out.
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Cyclomethicone would probably help. Maybe 2%
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@Sponge - Ultimately, it’s difficult to say whether companies are hiding things or not. They might be. But they might also just be using the convention for colorants as I mentioned above. Some companies just ignore the rules, have a mistaken impression of what the rules are or are just do what they want. Companies with legal departments are much more reliable than small companies or contract manufacturers.
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Just a reminder that this is a science based forum. Please stick to scientific topics & refrain from religion and politics. You can do that on Facebook or Twitter, but not here.
thanks!
Perry, 44*Some of the comments in the discussion above were edited or deleted.
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Vegetable oils will tend to make hair look weighed down and attract dirt. Better would be a silicone like Dimethicone or Cyclomethicone.
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DMDM Hydantoin
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I think in the context of your question, miscellaneous additives refers to “all the ingredients that weren’t otherwise mentioned.”
Without knowing the other ingredients mentioned, I can’t really say what would qualify as miscellaneous. @Christopher has listed some of the ones which could generally be considered miscellaneous.
This article on cosmetic ingredients may be helpful.
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Where have you seen the term “miscellaneous additives” in regards to cosmetics?
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Make it thin like water and be sure to have a surfactant in the formula. Polysorbate 20 will probably help with foam.
But without a list of ingredients at least, there’s not much more advice anyone can give you.
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@Christopher - yeah, I’ve been deleting them and will now ban the user.
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No, you won’t be able to make a clear formula with these ingredients.
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Without knowing what’s in the formula you won’t get much helpful advice.
I can say that some surfactant systems get thinner at lower temperatures. It really just depends on the system.
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It has a different molecular structure so probably not. But I suppose it depends on what you are using the microwax for.
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@ngarayeva001 - I agree that we don’t want to discourage people from learning but there are two points to consider.
1. I’m not sure it’s accurate to say the majority of people on the forum are not chemists or scientists. They just aren’t as vocal and are more often lurkers. I’d guess most of the members of this forum have a science background (although they probably aren’t cosmetic chemists specifically).
2. People who post questions do have a responsibility to do some preliminary investigation of their question at the very least. This forum should be for questions that can’t be easily Googled for an answer.
A quick Google Search of “emulsion stability” leads to this nice slide presentation on the topic.
https://www.slideshare.net/akarim717/emulsion-stability
And there’s even a helpful video explaining emulsion stability.
https://www.youtube.com/watch?v=y_696sKwISI@Microformulation has provided a deeper explanation for the initial question which is an answer that wouldn’t be obvious by doing a simple Google search.
I personally don’t mind answering pretty much any question, so I say keep them coming.
But I can understand how other cosmetic chemist & formulation experts get annoyed when the questioner hasn’t seemed to have even done the bare minimum investigation into the topic.
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Off the top of my head…
- Particle size when you first make the emulsion
- Compatibility of emulsifiers and oil
- Amount of water, oil and emulsifiers
- Having a suspending agent
- Environment your emulsion is exposed to
- Efficacy of your preservative -
No, the oils you listed do not generally oxidize. It has to do with the structure of the compounds.
Vegetable oils typically contain molecules that have double bonds of carbon to carbon (C=C). These bonds are susceptible to oxidation which is one reaction that happens in rancidity.
Vegetable oils also have Carbon Oxygen bonds (C-O-C) which can react with water to produce free radicals that can further react to break down compounds in the system.
Mineral oil, Petrolatum and Hydrogenated Polyisobutene primarily contain single bonded Carbon-Carbon or Carbon-Hydrogen atoms. C-C and C-H. These are generally not subject to oxidation.
I should note that Mineral Oil and Petrolatum are not synthetic oils. No one synthesizes them in a lab. They are derived from crude oil in the same way that essential oils are derived from plant matter. There is no chemical reactions involved in isolating them from oil.