Hi, does anyone have tips on making my o/w emulsion into a foamable product using an airspray foam pump? I was able to make a stable emulsion using tween 80 and span 60 in my oil phase. The concentrations of these surfactants/emulsifiers were determined by the oil's Required HLB of 8. My aqueous phase has ethanol, glycerin, lactic acid and water. The problem is that this formulation produces absolutely no stable foaming. I added DSCAD as a foam booster, but that didn't help, either.
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