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should I add W/O emulsifiers to water or oil phase before final mixing?
My emulsion serum is :-
OIL PHASE — 80% oil (plant oils, wax esters, light esters, alkanes etc…)
question 1) which oil thickening agent should I use just to have enough viscosity to have the emulsion serum(body oil kind of consistency) stable for next 2-3 months? 3% Cetyl alcohol or x% Ethyl cellulose ?
WATER PHASE — 5% hydroethanolic (50:50) herb extracts, 0.2% Magnesium chloride
question 2) will my emulsion serum oil be more stable with a higher water phase?
EMULSIFIERS — haven’t decided on the percentages yet…I’ve 15% left for emulsifiers, but obviously I won’t need to put such a high amount of emulsifiers so for the rest percentages I’ll probably increase oil or water phase as per you suggestions to ques 2
Oliver 2090(polyglyceryl-3 olivate/polyricinoleate), Olivem 900(sorbitan olivate){solid; hence will be dissolved in some isoamyl laurate(from the oil phase)}, Soy lecithin
question 3) so the main question, can I mix these emulsifiers first with water phase and later combine with the larger oil phase? (the herbal extracts will form micelles with the help of emulsifiers, while the continuous phase would be isoamyl laurate)
OR
should I water phase be added gently to the oil phase + emulsifiers ?
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1 Reply
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also please tell if I need to follow the HLB calculation system for W/O emulsions as well?
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