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  • BTW it doesn't matter if it's w/w or w/v, the order is the same, just the 1% line can differ ;) .In EU, it's ordered by weight with reference to the 1% line, hence, the logic conclusion is w/w. Except for some liquids (ethanol), w/v is no longer in …
  • Just make sure H2O2 does not react with the tissue and that the tissues contain enough liquid to keep hands moist for long enough to be active.
  • qs is short for Latin 'quantum satis' which means 'as much as needed' or 'sufficient amounts'. This is mostly used to adjust pH: Add acid or base until you reach a certain pH; the amount may vary from batch to batch. Or for base formulations wherein…
  • Well, for a fish restaurant, adding an acid helps ;) . But it would be AFTER eating, not before.Yea, mint & lemon sounds weird... unless it's a Lebanese restaurant... then it fits in perfectly.
  • @esthetician922 That would help to prolong shelf life.@Abdullah Maybe, maybe not. ROE contains carnosic acid and carnosol as 'actives' which are oil soluble and therefore protect oils. Water soluble rosemary extract contains rosmarinic acid as 'acti…
  • Last time I checked, glamourcosmetics.it has Isolan GPS.
  • I can only concur with both of you!Always measure pH.
  • @africanbug I completely forgot about the Abbott book. Started reading it few months ago but 'lost' it. Thanks for the reminder. That book is pure gold!
  • Thanks for the tip @czkld . I'll have a look at these.
  • @lewhitak Now @Perry is torturing his brains how to give you a smart answer such as "Sure, dimethicone and silanoles" :smile: .Silicones are so different of what 'nature' has to offer that it's simply impossible to get an alternative. A pl…
  • It can be a solubility issue which is also common with other not super well water soluble preservatives such as propylparaben or sorbic acid: If added too fast, it will locally surpass solubility limit and flocculate. Due to poor/slow solubility, th…
  • It's a great and active ingredient (if used in edible cosmetics which are actually eaten on a regular basis)...Seriously, in cosmetics, I can't see any benefit. If you want to go in that direction, use chitosan (cationic polymer of glucosamine).
  • Cosmetics and chemistry/science will never be good friends unless the former can abuse the latter to 'proof' benefits/claims ;) .Most of cosmetic 'science' is highly empirical...
  • You'll have to try it. Sometimes it's equal, sometimes better (regarding antioxidation).Smoke ring? You mean just at the top edge where product/air/jar meet?If so, get the air out of your bottle! You can't chemically remove it in head space but only…
  • Depends on the preservative and the formulation (what's in your water and in your oil phase).Very water soluble ones which do not interfere with surfactants may be added in proportion to the water phase, poorly water soluble ones are better added 'c…
  • The Kai Blendia is my dream solution. However, it will always remain a dream because Blendia is no longer produced ;( .The Karl Roth device, I posted a link to that just a minute ago in another thread: Is it any good?
  • It catches oxygen which isn't obvious although it's an antioxidant. Unlike phenolics such as tocopherol, it also reacts with oxygen to create water whereas phenolics only neutralise reactive products formed when oxygen reacts with 'stuff' such as un…
  • Depends on your product!Lets take your low viscosity lotion: It is likely the type which, under the microscope, looks like peas in soup. Such emulsions like high sheer (I'd use the cross head of the Steba but would file it as sharp as possible, prob…
  • Heavy water is nearly identical to normal water in most regards, even biological systems. Only regular consumption of considerable amounts will slightly mess with some enzymes which ultimately will cause certain health issues. One drawback is that i…
  • (Quote) 
Good point! A stick blender tends to get too warm too quickly. Most can't even handle 1-2 minutes of high viscosity mixing. Regarding closed shrouds, what do you think of these two products?Steba MX21 or Gastroback Design Pro E
  • The Dynamix (the other links seem to be rebranded Dynamix) is also on my probably-should-buy list. The other stick blender with an emulsifying rotor-stator head has been discontinued a few years back.The Bamix brand (made in Switzerland :smile: ) ha…
  • Nope, hydroxide will easily react with the acid turning it into sodium laurate. But it behaves differently than sodium stearate which forms a unique kind of crystals stabilising/gelling oil.
  • Looks as if you have difficulties scaling production up.What's the size of your lab batch and the production patches?Do you use a different type of mixer/homogeniser?
  • (Quote) 
Yes, there is: In order for a seed crystal to work, you'd have to have a continuous phase to allow for a chain reaction. What you have, if I'm not mistaken, is an emulsion/micellar solution of isolated oil 'particles' surrounded by …
  • (Quote) 
Well then, let's rephrase that one: Cosmetics, a statistically significant correlation between $$ spent and perception of how beautiful people think they'll become...Honestly, sometimes, just sometimes, I wish I were on the sell rat…
  • Unlikely that sodium laurate will work. Nope, just putting lauric acid and glycerol in the same pot gives just a pot filled with lauric acid and glycerol.If you need a plan B, you could try glyceryl stearate or glyceryl palmitate... if you happen to…
  • (Quote) 
A copy-paste from their patent:One preferred enzyme is papain, an enzyme obtained from unripe papaya. 
One particularly preferred form of papain is Linked-Papain™ (papain 
carbomer, as described in CTFA, the Internat…
  • As said, I think 1% fragrance oil should be good (if it smells good).I don't know why you want to add each 1% of the two Tweens... you mean a total of 2% with appropriate ratio? How should I know! If it were intended for addition to plain water, the…
  • That cream should hold fragrance well if mixed in well. With many (but not quite all) creams it's advantageous to homogenise again once cooled down, the perfect moment to incorporate fragrances. Tween 20 & Tween 80: Adjust ratio to match HLB of …
  • @tracingrobots Next time you order something, check out the space in the cardboard box around the order and look for a gazillion packaging insulation flakes made out of styrofoam. Finally a use for this annoying filling material! Form and size don'…
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