doctorbrenda

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doctorbrenda
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  • That makes sense the Jojoba Wax would help.  Prior to that, I do not understand how that formula could ever be expected to solidify when the great portion of the ingredients has ingredients that are liquid at room temperature.  I have found that if …
  • Thanks.  Good to know that I'm not the only one that attempts to save a batch, and that it could be okay as long as the post-testing is done.
  • I am very curious about that too, but would include other cosmetic ingredients or chemicals.  I also use stainless steel vessels for making emulsions (so there is a lot of heating and lengthy mixing).  I have been trying to find answers about possib…
  • The oils are not the problem.  Do you some research on "oil cleansing"; the use of vegetable based oils is very useful in deep cleaning IF mixed with the right emulsifiers and surfactant blends; they can really help loosen up and remove de…
  • Would you like me to give you some feedback that may be useful?  It will contradict some of what has already been written in these comments, so I don't want to confuse you or set you up for unproductive arguments.
  • Thanks, because I was a little confused; now that makes sense.
  • Thanks for putting your answers in italics throughout the text so I can see what you are specifically responding to for each part of the inquiry.  Yes, I was only referring to formulas use non-ionic emulsifiers, specifically the PEG or other ethoxyl…
  • That's good, because it is more valuable.  Besides the fact that most of the companies that have third-party sources performing their cosmetic testing employ unskilled workers, little or no education/training, and there is little or no supervision t…
  • Lisa, The preservation efficacy and potential for allergen/sensitizing reactions are two separate things.  Efficacy tests are much easier to provide accurate results for because the testing methods are pretty straight forward, with less margin for e…
  • OKay that makes a lot of sense.  That visual was better than some of other rudimentary ones I've seen.  So that must be why the polyunsaturated feel so much heavier.  Instead of just a "kink" or "bend" in the carbon chain length,…
  • Thanks, that's very interesting. So when they refer to something as being "lighter" weight, that means it just "feels" different, either more flexible or stiffer... right?  It's not truly "heavier" or "lighter&quo…
  • I agree.  I don't think that was an "amateur" question that doesn't deserve a simple suggestive response.  If you have experience that has been successful (or not), why not just let others know what has worked (or not worked) in your perso…
  • Very fascinating.  Makes sense that they'd want to do transesterification of vegetable oils for many other uses, not just cosmetic stuff, if it's low cost and higher yield (for medical/pharmaceutical, industrial, etc.).  Thanks everyone, for sharing…
  • Okay, thanks for that information, that's very helpful to have that understood.  So then, what I am curious about is the "Stearyl Palmitate" product I've been buying that indicates it's an ester of Stearyl Alcohol and "Methyl Palmitat…
  • Interesting study on how it affects rats... if only rats and humans had the same system, we'd learn so much more. And then they extrapolate that to humans, and concluded that it may have an analgesic effect on the skin... so I guess there are some …
  • As a very general rule, I would give it 24 hours to see the fully thickening effects of any emulsion.  I have actually noticed a difference within the first 4 to 6 hours, 12 hours, 24 hours, 36, and even up to 48 hours, after that it seems to finish…
  • Wow.  First of all, on the issue of trying to formulate products that will "stimulate arousal" for females, it's not really a "vaginal" issue, but rather a "clitoris" and "labia" issue... and what will work fo…
  • Yes, the olive squalene and squalane is a separate product by itself, that is ONLY that substance; when you buy olive squalene/ane it should not have any other substances in it.   With the "unsaponifiables" it can include a list of other t…
  • What I have been told by one chemist now, and his colleague concurred, is that since there is a significant fraction of "squalene" in olive oil, this will be the majority of what makes up the "unsaponifiables" portion.  Because i…
  • Oh, I didn't think that it was some kind of a trade "secret", but rather just not important for most people to care about exploring.... that's why I said it's kinda nerdy to be wondering.  So I agree with your layman's explanation of "…
  • And to "Zwapp", thanks for the article link about cosmetic pharmaceuticals... I'll add it to my long list of reading material that I never seem to finish (LOL).  And I loved your philosophical interlude!  Thanks for everything you add to t…
  • I'm really starting to like you folks! What "JohnB" mentioned about the INCI labeling of ingredients is an important in that it was only intended to help with consumers need to pre-screen what they expose themselves to.  If a consumer kno…
  • Thank you (MarkBroussard and JohnB) for pointing out the there can be different grades of "INCI: Caprylic/Capric Triglycerides".  I didn't realize that at first, but it totally makes sense, because there are many ingredients that have what…
  • Thanks.  That what I knew to be true, but it's difficult to tell other people when they aren't really accurate.  I'm also interested in learning more about how this plays a role with delivery of active ingredients (i.e., drugs as you mentioned) or o…
  • Oops!  Typo on the last sentence... I meant it would probably be difficult to make a WATER-in-Oil emulsion if you're working with more than 50% water.  My understanding is that the required HLB is simply the amount of emulsifying/surfactant power it…
  • Thanks!  I'm glad to know that my guess was right. But that is so interesting that the required HLB could be different based on whether you're making an o-in-w or w-in-o formula.  I wish the manufacturers and suppliers that stated that difference b…
  • I would not recommend a Brita water filter for this task.  There are some good options on Ebay as someone noted above.  I have colleagues that have used them with great success, and some are reasonably affordable.
  • I agree.  If they aren't following proper INCI labeling, or any other real regulations, then it's a waste of time to even try to speculate.  Unfortunately there are many cosmetic companies that are trying to market their products as "natural&qu…
  • Wow!  Okay people, I think this is what happens far too often with text/internet communication.... to much opportunity for misinterpretation. Perry, thank you for your mature, professional, respectful response.  I'll just ignore some of the other m…
  • I can see that what I really need to do is spend more time writing a longer explanation before asking a question.  I think everything was posted here is well understood by formulators.  I did not say the formulas in question only contained "3 i…
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