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  • You're probably producing cocoyl glycine which is no longer a high HLB anionic sufactant but a low HLB non-ionic one which also lost most of its surfactancy.At a rough estimate, this starts happening at a pH below ~4.5 (really starting to get proble…
  • The amount of iodine (iodide, to be precise) is minuscule and won't disturb as long as you're not using it in an oxidising formula (e.g. containing hydrogen peroxide or benzoyl peroxide).Sea salt contains a lot more than just iodide and it's frequen…
  • Depends on what you want to solubilise where ;) .For what does the abbreviation MPG and DPG stand for?
  • Dehydroacetic acid was/is one of the first 'alternative' preservatives though it's a quite old compound which just sounds natural but isn't and hence is mainly good for 'free from' claims. It's somewhat outdated due to too poor performance compared …
  • From what I've read, they're super fancy and very stable because they're a bit like microencapsulated oil droplets which can neither fuse/coalesce nor undergo Ostwald ripening.
  • pH 5.5 ain't bad. I thought that maybe you've got something around 7 and hence the many preservatives (though some of which only work at <5.5).Personally, I wouldn't feel comfortable with that many preservatives. The weakest but also most prone t…
  • Uppps, I just realised that I wrote 1,3-botanediol instead of 1,3-butanediol ;( .I wouldn't use either of the two.1,3-butanediol might work as nutrient supplement and sure, it does what similar compounds do but I'd rather go with one which also boos…
  • I'd go with the triethyl citrate version. I'm currently trying one instead of aluminium and so far, it's the first one that works more or less. Before, I used 5 days aluminium and on week ends did detox (= nothing or "natural"), now with t…
  • If I compare a 10 g package from a reseller or buying 10 kg directly, the price for those 1'000 times heavier package may be less than 100 times the price.There's often a considerable drop in price per gram when going from 10 to 100 to 1'000 grams t…
  • I usually go overkill and use 30% in a spray bottle (and regularly have to evacuate the bathroom because air gets unbreathable). Not to recommend for the average (= non-suicidal) user.When there's also limescale involved, I mix pure formic acid with…
  • - Allantoin won't do anything in a shampoo. If you want a product against dandruff and dry scalp, use it in a leaf-in product (0.1-0.5% is common).- If you use Dissolvine GL as a preservative booster & sequestrant, then 0.1% is all you need. Mor…
  • I use 70% iso at home and at work. Hydrogen peroxide is only for cleaning really nasty stuff like the black algae which form in the edges around the bathtub.
  • If memory serves me right: Didn't traditional vanishing creams use sodium stearate which forms special platelet-like crystals giving them the optical illusion of "vanishing" on the skin. Other stearate salts usually don't do that and mixtu…
  • Maybe something like THAT? Sorry, can't find the English version...If I had some money to spend on "cosmetics instruments", I'd go with one of these. Alternatively, an FT-IR for quality control of bought ingredients especially if you're bu…
  • Fancy instrument to substantiate claims and be good for marketing? Seriously? Does that impress anyone except us geeks?
  • With a quick ditch, mix, cheers I wouldn't be astonished if it were &#13;particle size although a V blender is fairly gentle on particle size.On the other hand, did you check that the product was really homogeneously mixed in the V blender? They…
  • Formaline is obsolete in many countries because, well, it's formaline.For thorough disinfection, go with hydrogen peroxide which leaves no traces and won't harm neither your health nor the environment.
  • Can't tell you why ;( . But I have some questions, if you don't mind me asking:Why allantoin and why so much? It won't do anything in a shampoo (much like panthenol and glycerine, the herbals at least give the product some claim). Why so much Dissol…
  • At lower pH, phytic acid works better than gluconic acid (the active form of gluconolactone). Citric acid can also be used but may not suffice if used alone. GLDA or MGDA would be very good, semi-synthetic, and easily biodegradable chelates.
  • It seems to me that it contains an awful lot of polyquats and fragrance... really a lot of fragrance!Maybe add a silicone or fatty alcohol? But that's just a wild guess, Perry and alike have way more experience and knowledge regarding shampoo than I…
  • These are two different chemicals, one is also known as ethylene glycol monobutyl ether (the correct chemical name would be 2-butoxyethan-1-ol but because it's isomer 2-butoxyethan-2-ol isn't stable, nobody uses the "-1-") and the other on…
  • It's probably particle size since caffeine and more so theacrine have a bitter taste and also creatine does taste slightly bitter. Especially caffeine and theacrine are not easily soluble in cold water and therefore, smaller particle size greatly in…
  • And what are the ingredients?
  • Ethanol or isopropanol might help...
  • Okay. Suppose it's in there as chelate in which case 0.1% is already more than you need and you are free to adjust pH since chelation with citrate works even better at higher pH.
    in PH Comment by Pharma January 7
  • Dermosoft 1388 requires you to lower the pH. Since there is as good as no water present whilst your clay may have strong pH buffering capacity, doing so will be tricky. If you want to use levulinic and anisic acid, you shouldn't add them in their wa…
  • Again, why (= for which purpose, what is citric acid supposed to do in your formula) do you add citric acid?See, adding NaOH or the like will solve the problem of a low pH but it may not be the solution you're looking for. There might be better opti…
    in PH Comment by Pharma January 6
  • Concentrated lactic acid has a faint smell but easily covered. Never noticed anything once diluted (haven't the bes nose, though).
  • Why did you add citric acid?(Weird, I already replied to that post but somehow my answer isn't there anymore...)
    in PH Comment by Pharma January 6
  • At least, chromic acid does not dissolve glass and it doesn't kill you (that is, if they find a cure once cancer kickes in). Sorry for the black humour :) . Chromic acid mixed with sulfuric acid was widely used to clean glass ware until someone foun…
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