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Home Cosmetic Science Talk Formulating How does % oil phase impact the stability of an o/w emulsion?

  • How does % oil phase impact the stability of an o/w emulsion?

    Posted by seryou on March 8, 2023 at 10:32 pm

    The lotion I was working on began to split and I was told to decrease the amount of oils to improve the stability, but I’ve also seen people say increasing the oil/internal phase makes it more stable due to the increased viscosity, which is correct?

    I tried reducing the levels of oils but the lotion ended up having less of a soft feeling on the skin. Would replacing a portion of the liquid oils with waxy emollients help improve stability while keeping the skin softening effect?

    jemolian replied 1 week, 6 days ago 2 Members · 1 Reply
  • 1 Reply
  • jemolian

    March 8, 2023 at 11:26 pm

    Perhaps you can mention what your formula is.

    The factors that can include the stability includes the percentage of emulsifier vs how much oil it can emulsify, any additional rheology modifier such as gum or carbomer used for thicken and aiding stability, additional of other co-emulsifying or waxes, etc.