alchemist01
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(Quote) That product specifies water-soluble irritants, which doesn't seem to apply to tear gas according to previous comments.
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Yes, I have used a slightly modified double can tumbler (commonly used for paint) to mix 5 gallon HDPE jerry cans. This was to mix silicones, water, and some emulsifier for a personal lubricant being shipped out in the jerry cans themselves. I have…
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Buying a substantial quantity of deuterium might put you on an FBI watchlist
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err +/-1% of the value, not 0-2%. So if you're pouring 1g like in your example, you could allot a range of (.99*1)-(1.01*1), or 0.99g - 1.01g. To be clear, the range you allot is for a QC department to tell you or your own standards, not me, 1% was…
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This is one of the reasons measuring by weight is useful. Measuring exactly 100mL of something viscous like glycerin means little if it doesn't get into the end product. I would recommend either: a) adding whatever you're weighing directly on the s…
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I don't think I can directly speak to precipitation, but I have made many batches of a product that uses both xanthan gum and HEC. HEC will hydrate well enough on its own over time, xanthan is kind of a pain. I recommend using shear mixing if possi…
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Your oil phase has waxes, so I imagine you're heating it pretty high. Do you add the preservative in with heat or do you let it cool? I've seen similar goop with phenoxyethanol (in Optiphen) when I carelessly added it above 100C.
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(Quote) I highly doubt anyone will tell you that, because no one has made your product.
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(Quote) What are you using it for? Propylene glycol is a multi-faceted ingredient. It works as a humectant, so you can substitute with glycerin, sorbitol, PCA, etc. if you need one added in. It also works as a preservative enhancer, so you…
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(Quote) It's actually quite an efficient process. It's not worth it to me to use a homogenizer and dispense into final containers, as I can hydrate/mix/neutralize the gels in totes and ship them out as is. I would argue that it saves a lot …
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(Quote) I use a mount mixer that mixes everything in its final container (a 1kL tote), but I would estimate about 150-250rpm for 30 minutes for the carbomer mixing.
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(Quote) No doubt! Read this if you have any doubts: https://animals.howstuffworks.com/mammals/eat-polar-bear-liver.htm
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This is what we do in our production of 1000L gel batches: 1) Add carbomer into a dry vessel 2) Add water on top, and try to make an effort to wet all the carbomer so that no dry "islands" poke up 3) Give it a good, low shear mix until ho…
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My company makes what is basically Icy-Hot and we tried out menthyl lactate, methyl salicylate, and menthol. I don't recall specifics about menthyl lactate but for what it's worth it made a lot more sense for us to use menthol. It works quite well…
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It's not that they won't "mesh," it's that hyaluronic acid is water soluble. To incorporate it into your formula, you need water. That said, sodium anisate is also water soluble, and probably isn't great as a sole preservative, though with…
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What are you asking for exactly? It appears you copied this product's ingredients: https://ondabeauty.com/products/rejuvenatingfaceandneckmoisturiser If you're trying to recreate their product, wouldn't you know if it works or not?
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The extract in question is lobelia inflata, for what it matters. I agree homeopathy is nonsense, but this particular extract is contributing a lot to the color/scent of their product, which is of more interest to me than its function. Reading more o…
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I think you might get a lot out of this paper: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6099538/pdf/molecules-23-01571.pdf
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I think that pH is a little low for a conditioner. I have no idea if that's the issue, but it should be a quick adjustment to try. I would try and bring it closer to 4-5, but that's a personal range. For a rinse-off conditioner cetrimonium chloride …
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I don't think it's too much, it's probably too little. What is the product's pH?
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@jemolian Would you mind elaborating on the slurry method? I've been having trouble preventing agglomeration of carbomer without shear mixing in larger batch sizes. Indirect addition methods I've read usually use an oil phase, but anhydrous hydrophi…
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I made a version I quite liked with 4% PG, 1% PEG600, 0.4% Glycerin. It beat Purell in a blind trial with some office workers next door, too! This was for 70%v/v ethanol, I imagine going lower or higher will give different results.
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"Balling" is a common phenomenon with carbomer. Some formulas actually do it on purpose to create a soft exfoliant (http://colinsbeautypages.co.uk/skin-peeling-from-peeling-gels/). From what I've read it happens because carbomer is hydrati…
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@David08848 there is a blog post on this website that should help you figure out your salt curve. https://chemistscorner.com/why-does-salt-thicken-shampoos/
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Microbes can grow in salt solutions approaching saturation. I have no idea how much salt you're adding but I would use a traditional preservative.
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I think the sodium silicate is just a film former. These act to smooth out the skin by filling in crevices/valleys in the outer layers of your skin to leave a cohesive covering. According to this patent (https://patentimages.storage.googleapis.com/7…
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Urea is not particularly stable. Evaporation of water can crystal formation. Temperature fluctuations (I believe within ambient range) and air exposure can cause pH drift. According to this paper (http://www.iscd.it/files/UREA-FROM-THE-CHEMIST-S-POI…
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As far as DIY sites go, humblebeeandme is one of the better ones. I have used her website as a starting point for some stuff before, really because she's the only one that posts formulas with actual %s and gram measurements, rather than cups. It's s…
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I think products claiming hair growth or the prevention of hair loss are mostly marketing. At best you're buying an anti-dandruff shampoo with some kind of antifungal active. The only exception to the rule might be minoxidil.
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If you need a stiff gel you're going to need to change carbomers; some varieties are designed to work in higher concentrations of ethanol. However, I've tried carbomers around your tolerance and found that a flowable gel very similar to hand saniti…
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