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Air Bubbles in Serum formula, I need some help please.
Hi! Everyone,
I’m experimenting a new serum formula but final results are ugly, a lot of air bubbles and final pH 4.0. I wondering if Carbopol 940 responsible or there is any issue in he phase mixing procedure. I will appreciate your feedback. Thanks, Javier
Water 87.8 % Hyaluronic Acid 1 % Gogi PGB 1 % Phytexcell Oay 1 % Decorinyl 5 % Aleo Vera Concentrate 40x 0.5 % Glycerin 2 % Germaben II 0.5% DL-Panthenol 0.5% Carbopol 940 0.7 %
Would be Xanthan Gum a better agent for thickening?
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4 Replies
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1. Where is the neutraliser for the carbomer? I don’t see it in your list.
2. Stirring has to be done slowly or you will get bubbles. I usually neutralise as the last step and get all the air out before that. -
Sorry. Yes Triethanolamine.
Thank you!! Javier -
Javier:
(1) Are you using SLMW Hyaluronic Acid or “Regular” Hyaluronic Acid? If you are using Regular Hyaluronic Acid at 1%, you will get some thickening of your formulation from the HA alone, so you’re halfway there (assuming you’re trying to end up with a viscous liquid that can be dispensed from a bottle dropper)(2) You can eliminate this problem altogether by using thickeners/gelling agents other than Carbomer 940 that won’t require neturalization, so you can eliminate the Carbomer/TEA from your formulation.(3) Your options are: Xanthan Gum (as you mentioned), Hydroxyethylcellulose (or any other cellulose derivative), Sclerotium Gum, Konjac Root Powder, or a combination of Xanthan/HEC, HEC/Konjac, Xanthan/Sclerotium. Xanthan and Konjac when mixed immediately gels, so you would end up with a gel instead of a serum. Lucas Meyer has a nice combo ECOGEL, that combines Sclerotium, Xanthan, Pullulan and Lysolecithin that I am just playing around with, but it has interesting properties.The ingredients in (3) are going to be much more forgiving to mechanical agitation (stirring or shear) than Carbomer/TEA regarding entrained bubbles.Which leads to the question … What device are you using for mixing … an overhead mixer? spatula? or other stirrer? Whatever you’re using is introducing bubbles into the system if you are mixing at too high of a speed. -
Hi! Mark,
Thank yku for your help. Im using regular HA, but I was looking for additional viscosity. I will try with Xanthan and see the results. I appreciated your help.
thank you! Javier
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