RobboAU

About

Username
RobboAU
Joined
Visits
263
Last Active
Roles
Member

Comments

  • I use the mixer with the digital display and use it to mix shampoo, conditioner and hair styling emulsions. It suffices for lab volumes of 100-800 mL. I primarily use a pitched blade axial flow impeller (from eBay), which I was advised to use inste…
  • Just for fun, I decided to try the OpenAI chatbot that's making social media news recently. I was rather impressed with the result it generated. "Clean beauty is a term used to describe cosmetics and personal care products that are made with i…
  • (Quote) 
Interesting, does that mean I've been taking chocolate the wrong way this hole time?
  • (Quote) 
You weren't disrespectful at all, I had completely misunderstood the 350 due to assuming it had the same meaning as the numbers in D4-6 cyclomethicones.  The formulation I'm working on wanted a thicker aesthetic and a silicone afte…
  • Good lordketchito said:(Quote) 
Wow, I'm just about to start a formulation with 350 too! I wonder if my fragrance supplier can tailor a hot baked humble pie fragrance for me  :s
  • Dimethicone comes in various sizes, based on how many Si-O units it has. D5 is as Graillotion described. D350 has 350 repeating units and is therefore much bigger. It does not evaporate quickly (if at all) when heated to normal process temperatures…
  • (Quote) 
Curious, I went the opposite way. I love 68 (technically the BASF equivalent) and found 202 unpleasant in comparison. I had to do a label copy of a popular hair styling product that used 68, but only had access to 202. I found the…
  • You're welcome, hope it helps. Keep in mind that whilst this is helpful for lab-size batches, scaling it up beyond the 1 kg range can be challenging and expensive. Let us know how it goes!
  • (Quote) 
You can use an overhead mixer, but get a dispersion blade for it (which is also called a Cowles blade). They're very simple to manufacture, so grabbing a cheap one ebay for your overhead is fine.  I would recommend batch sizes grea…
  • You could try using something like Dermofeel Viscolid to thicken your oil phase. It doesn't give you a clear product, but 5% is apparently enough to gel sunflower oil. The TDS on prospector gives a good overview.
  • (Quote) 
I didn't realise you were adding it to soften the water in the washing machine. In that case I am skeptical that is practical or feasible. 17 kg of water at 700 ppm is about 12 g of dissolved solids. A 150 g dose of detergent would…
  • 700 ppm is 0.7 g/L (0.07% w/w) of total dissolved solids, some of which will be CaCO3. If we assume that all the TDS is metal cations that EDTA/STPP complexes with, then 2% is more than triple the amount you need. It's also a lot of Na+ ions. To q…
  • Do you have a measure of your water hardness? The US Geological Survey defines very hard water as having a CaCO3 concentration greater than 180 mg/L. Converting to mol/L, that's 0.018 mol/L. To treat that you'd need 0.018 mol/L of disodium EDTA, w…
  • (Quote) 
Salting out is the practice of reducing the solubility in water of a compound by increasing the ionic strength, i.e. adding more Na+ ions. My suspicion is that 5% STPP is a lot of Na+, the back of my napkin says it's equivalent to …
  • The ABS numbers are a measure of how much light with a wavelength of 500 nm is absorbed by the sample.  I'm assuming that sebum oil has particular carbon chemistry that absorbs light in the 500 nm region. The sample that absorbs more light therefor…
  • Fantastic, thank you both! I haven't got any confirmation on the manufacturing process (nor do I expect it), but industry standard is apparently to run the polymerisation in an ethanol solvent. When you say that it may aspirate, do you mean that e…
  • I'd also suggest trying a fatty alcohol, but more specifically a blend like Montanov 68 or Emulgade PL 68/50 (cetearyl alcohol & cetearyl glucoside).  They should help improve the rinse-out if you're using them around 3-4%.
  • As a first timer that has used the search feature many times, I find it particularly ineffective. It's okay for searching for a single word, such as "process", but if I'm searching for "Hot process" I will get anything and ever…
Avatar

Latest Q&A session

Forum Instructions

Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!

30DaysToBecomeABetterCosmeticChemist_cover (1)