Soap Foaming On Serum Issue With Essential Oil
Hi everyone, I want to introduce essential oil to my water based gel serum formula. However I face challenge since solubiliser is required. I found out even low dosage of solubiliser can cause soapy foam when rub on hands, which was done in separate small batch with only solubiliser and water. So I thought it was solubiliser issue and try switching different raw mat and even use combination, but soapy-ness still there.
Then I did another small batch with only essential oil, pentylene glycol and water, the result also give me soapy-ness…
So now I assume the soapy-ness came from both solubiliser and essential oil? If anyone have experience on this please help because I really want to introduce essential oil, though I have seem some in market samples.
Note that I can get solubiliser and essential oil ratio, but just the soapy foam thing appear everytime.