Duncan

About

Username
Duncan
Joined
Visits
207
Last Active
Roles
Member, Professional Chemist

Comments

  • I did initial formulation of one product actually IN my kitchen including a video on how to make it for the subcontractor - Worst part was having to do the washing up before I started formulating
  • Basic lab requirements Hotplates Beakers Overhead paddle stirrer Homogeniser pH meter Some method of measuring viscosity Weighing scales / balance DI water lots of storage space and easy clean surfaces Ovens / fridges if you want to do stability in …
  • Not specifically prohibited, however, as you mention spores and higher than normal TVC compared to cosmetic materials can be an issue Items like Honey, Royal Jelly, Yoghurt, Cocoa powder can be bug central, however, pasteurising in a batch can help …
  • https://www.henriettes-herb.com/ This gives a big selection along the same theme. 
  • Plus points: Natural, very strong colour Minus points: Smells unpleasant, stains everything in sight. Only thing that will remove it is hypochlorite bleach (Had to help a squid processing plant with cleaning - bleach is the only thing that shifts i…
  • C25 is the go to material for clear ringing gels. If the product doesn't have to be clear, or you intend to have a clay in there you could use waxes and butters instead. If you want a clear waterbase gel that flows rather than bounces, many gelling …
  • Evonik and BASF are the two manufacturers that come to mind - trade names Tegin Acid C or Cremaphor A25 Only downside with this material is that it needs high temperature to get it to dissolve and can clump up typically upto 95 deg C- not beyond th…
  • On silicones: Dimeticones OK, Cyclomethicones really not a good idea as they are volatile and quite flammable Generate clouds of white silica dust when they burn (Don't ask)
  • Which Lamesoft are you referring to - there is more than one grade and they are all different TM Benz for instance is a nice pearl concentrate PO65 is the material that gives a 24 hour moisturising claim if you use enough
  • I'll wade in from a contract manufacturers point of view - I work for one in the UK What Perry and Mark have said is pretty much on the money - it depends on what you want, and how you want to start your brand. (And Mark I apologise for taking your…
  • Could just use a solution of 10% sodium hydroxide. As a rule of thumb 10% sodium hydroxide has the same pH adjusting ability as TEA. If your Naoh solution is stronger / weaker just pro-rata it It's also a hell of a sight cheaper :) Only reason I'd …
    in TEA limits Comment by Duncan June 2018
  • http://ec.europa.eu/growth/tools-databases/cosing/index.cfm?fuseaction=search.results&annex_v2=III&search 2.5% limit for leave on products in the EU, not sure if that applies to total addition or free amine content. 5% TEA ? that's a hell …
    in TEA limits Comment by Duncan June 2018
  • They usually contain a conditioner for application post rinse. (Ones I've applied anyway. These are typically acidic and will neutralise any ammonia residues
  • If you're doing hot mixes Methyl and Propyl parabens go in no bother. Can also use a side pan with hot water to pre-dissolve then tip into a cold mix - or if you can't use propylene glycol, Glycerin makes a good substitute
  • Insurance means that if you get somebody litigating, even unjustifiably, it'll pay to waste a lawyers time not yours ends up being very cheap then
  • 3 basic tools for testing in any lab Viscosity - need a brookfield or equivalent, or if you are making low viscosity products you can use a Ford cup (What they use in spray paint shops - advantage is that you can get it from a tool store, and they a…
  • From past experience the choice of acid will depend upon the taste Citric acid - perfectly good, can get a bit Sour and Tart at high levels Phosphoric - not personally used that one for mouthwash, but you'll find it in products such as Coke or Pepsi…
  • Noticed that you are using Esaflor - homogenise that into the water phase, add the alcohol slowly with stirring. I've not had to add citric / alkali to get it to gel It isn't 100% crystal clear in the applications I've used it in
  • Check the grade of Guar you are using. Some are optimised for alcohol use, some are better for using in things like shampoos and conditioners. I'm more familiar with Jaguar grades from Rhodia, however, there will be local equivalents out there
  • If you want cups pre-made try looking at places that sell automotive refinishing products - they're used for checking paint viscosity before spraying, or google "Ford cups"
    in Viscometer Comment by Duncan May 2018
  • Sodium Carbonate, or sodium metasilicate to raisse the pH and cut through grease. If you are cleaning really greasy surfaces sodium hydroxide works well, but is aggressive to surfaces and in skin contact. Metasilicate is aluminium safe EDTA is comm…
  • Found that Sodium Benzoate for Facial products can be rather stingy / cause redness, so best avoided
  • The question is is there anything in the base that is either coming through at the same time as the HQ, or something in the background that is giving a high absorbance on the UV detector. Obvious question have you tried HPLC of base with no HQ in th…
  • Jacket heating is quicker, and more even, you're less likely to get burnt spots. You can (and I have) used a 20 litre cooking pot on a hotplate to make a batch. You'll need an overhead stirrer going quickly to ensure circulation. If you're looking f…
  • Overhead mixers are different as they are less stressed, and if all else fails a drill press from your local big box DIY store (Harbor Freight, Machine Mart etc etc etc )can be used at a push 
  • Spares is the issue for me. If I buy Silverson or IKA, (not used Waring but assume they do the job equally as well ) no matter how clapped out I can still get spares support. Especially for homogenisers which can consume teflon head bearings like …
  • If he did he would have eaten the entire contents of Aisle 3 at the local 7-11
  • Search Dishwash on here you'll find plenty of threads about that
  • Colouring ( 6grms -  RIGHT? ) Of a 1% solution maybe. If using powders prehaps not so much. For small batches use a solution 1% or less then add to the desired colour.  Doesn't matter too much what the exact dilution is as long as you are consistent 
  • There are two common grades your standard 30% CAPB which can vary between OK, or cheap and crap, and the higher solids versions (Tegobetain F50 and equivalents) Check the specs as a start, but the best way of checking if it fulfills your needs is t…
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)