Home Cosmetic Science Talk Formulating Queries about cream formulation

  • Queries about cream formulation

    Posted by ML3000 on October 2, 2023 at 1:51 am

    Dear all,

    I’m very new to doing O/W topical face cream formulations, and am wondering about a few things. I heard from another formulator that the emulsion should be left to settle and age a bit after it has been made before doing any analyses on it - particle size measurements, and accelerated temperature testing. My question is - how long should I leave it to settle and age after making it please? Does this vary from emulsion to emulsion depending on what is in the formulation and if so, what should I be looking at to help me decide how long to age the emulsion before bringing it forward for further testing? Thanking you in advance for the guidance!

    DRBOB@VERDIENT.BIZ replied 1 month, 2 weeks ago 4 Members · 7 Replies
  • 7 Replies
  • fareloz

    Member
    October 2, 2023 at 2:28 am

    Not sure about actual production, but in DIY you set it off with open lid for a night to cool down and gain final viscosity

    • ML3000

      Member
      October 2, 2023 at 4:37 am

      Thanks for sharing! Does it need to be in some kind of sterile chamber like a laminar flow while cooling overnight with the top off like that?

  • microformulation

    Member
    October 2, 2023 at 8:05 am

    It really depends on your Formulation, but it’s not a hard fast rule that you have to wait. There is a recent discussion you can refer to about post-manufacturing and viscosity. It is very much Formula dependent.

    In production, I have generally seen the product placed in “QC Hold” post-manufacturing. It is in a sanitized container. This hold allows Micro to get back and for the batch to meet the specs as defined.

    I would not leave it out overnight with the lid off. We don’t use laminar flow hoods in Cosmetics.

    • ML3000

      Member
      October 13, 2023 at 4:17 am

      Ok, thank you so much for sharing!

  • DRBOB@VERDIENT.BIZ

    Member
    October 5, 2023 at 12:54 pm

    Leaving the emulsion out o/n in a closed container is usually good for equilibrium prior to testing/stability

    • ML3000

      Member
      October 13, 2023 at 3:48 am

      thanks for sharing!

  • DRBOB@VERDIENT.BIZ

    Member
    October 17, 2023 at 10:00 am

    You are most welcome Good luck

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