Agate

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Agate
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  • @Perry Do the same regulations apply for colour(ed) materials which have another purpose in the formula, either functional or as a claims ingredient? Could one argue that carrot oil is a claims ingredient or has some sort of benefit for the formula,…
  • @RDchemist15 You're exactly right, contact time is the issue. If you spray, you just won't apply enough liquid to ensure that you get full coverage for long enough, as the little amount that gets sprayed will evaporate too quickly. Theoretically, I …
  • (Quote) As a medical professional, I feel a duty to point out that sprays are absolutely not appropriate for hand sanitization. This is a very common but dangerous misconception due to many sanitizers being wrongly sold as sprays. It is true that li…
  • The WHO formula should not be in a spray. It's a dangerous way of application as you are guaranteed to achieve incomplete disinfection. If you use google to search this forum (query: site:chemistscorner.com hand sanitizer), you'll find answers to yo…
    in Hand Gel advice Comment by Agate April 9
  • A few years ago I spent something like $20 on a 16oz. "anti-allergy" shampoo for our cat... gullible pet owners aren't a bad market.
  • Easy solution: Follow the WHO formula (https://www.who.int/gpsc/5may/Guide_to_Local_Production.pdf) which doesn't include or require a gelling agent in the first place. It's simple, it's cheap, ingredients are available, and most importantly it's pr…
    in Hand Gel advice Comment by Agate April 8
  • I've not yet made a shampoo bar myself, I have just read in multiple places that many shampoo bars benefit from extended drying time. One example: (Quote) https://www.humblebeeandme.com/mango-mango-shampoo-bar/ I'm not confident that this alone wi…
  • How long did you let it dry before use?
  • Thanks to both for weighing in. With the cocoyl being prone to variability it makes sense to me that the more consistent lauryl is used as the industry standard. Since I am looking to go into a niche market where people might well dismiss a product …
  • @em88 I personally enjoy reading the detailed posts by @lmosca. I think it's especially helpful for a relative beginner like myself to have things explained that more advanced members may find obvious or otherwise superfluous.
  • @Fekher What WHO document are you referring to?
  • Ah that makes sense, thanks for sharing. :)
  • As far as I'm aware you wouldn't need a preservative, provided that the person who uses it doesn't accidentally or intentionally add water to the container. If you wanted to have some protection for that eventuality, you may still want to add a pres…
  • Now that you mention it I realize that there was some thickening as the pH dropped, when I get my pH meter I'll do a proper test at 
different levels. How do you market your shampoo, if you don't mind me asking? I keep reading how vital a s…
  • Very interesting, thank you. How do you test for pH limits? Today I was testing Sodium Lauroyl Methyl Isethionate for the first time, which initially dissolved into a milky-opalescent solution with a pH of about 6. I added some lactic acid and sudd…
  • @Belassi It's nice to hear I'm not alone with that experience. Is there a particular practice that you like to do to get to know a new surfactant or is it more of an organic process for you?
  • To me it feels a bit like playing whack-a-mole. I understand that people want to help themselves and I like to support that in general, but I do wish that those who are considered authorities didn't fuel this fire in irresponsible ways. Not quite at…
  • Two years ago I had my own "Why don't I make a shampoo, surely it can't be that hard?"-moment... Many (unbelievably) bad hair days later I've learned that it really is that hard, and I already had some education in the relevant fields. Unl…
  • @lmosca Thank you for your enlightening posts on this.
  • Seems like a bit of a waste of Ethanol. Here's a list of suggestions for surface disinfection: https://www.canada.ca/en/health-canada/services/drugs-health-products/disinfectants/covid-19/list.html#tbl1
  • Maybe it's a stupid question, but if you're basing this on soap, couldn't it be formulated to be "self-preserving" via a high pH?
  • (Quote) Glad you've changed your mind towards a liquid product, that definitely is the safe choice. However, sprays will not dispense enough product. It seems to be little known that one needs about 3ml per application so that hands stay wet for the…
  • @tracingrobots I was thinking about how they could achieve not a more concentrated, but a less concentrated barley juice, which is as close to water as possible so it doesn't make preservation impossible at such a high percentage. @Perry Thank you …
  • I have a sample of such a product here, by a German brand called Plaine. It's said to replace body wash, shampoo and shaving cream. This is the list of ingredients: Sodium Bicarbonate, Sodium Myristoyl Glutamate, Talc, Maltodextrin, Citric Acid, Xan…
  • I wouldn't call Tata Harper small at an estimated revenue of $60m per year.Is it possible that they used some sort of processed (filtered, centrifuged, pasteurized...?) barley leaf juice to replace some of the water? The cream does appear to be brow…
  • Have a look over here: https://www.who.int/gpsc/5may/Guide_to_Local_Production.pdf
  • @Fekher Hope it helps :smile:
  • Just a bit of safety info on essential oils, particularly the highly allergenic cinnamaldehyde. At 1% concentration, 2% of patch tests showed a reaction, "this makes cinnamaldehyde the most high-risk essential oil constituent known from patch t…
    in Sanitiser Comment by Agate March 23
  • You will find your questions on how to make sanitizer without a gelling agent answered here: https://chemistscorner.com/cosmeticsciencetalk/discussion/7284/how-do-you-make-hand-sanitizer (follow the link in the first post to the WHO guidelines, and …
  • There seems to be some confusion around that gel = pump and liquid = spray, but this is wrong. Liquid sanitizers are not to be sprayed (for use on hands), as Belassi said you cannot apply enough and it will just evaporate too quickly. Liquid sanitiz…
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