Home Cosmetic Science Talk Formulating Wisps and flakes in an aqueous lotion

  • Wisps and flakes in an aqueous lotion

    Posted by Dr.Drey on March 25, 2024 at 4:39 pm

    Hi everyone !

    I’m developing an aqueous solution containing 10% of a hydroglycerin plant extract, 10% of denaturared alcohol (0.1% TBA + 10 PPM bitrex), three different hydrolates (5% each), 0.2% of sea salt, mel, potassium sorbate, sodium benzoate, and distilled water.

    At Day 0, the solution is transparent and clear. Six days after manufacture, I observe wisps and flakes at room temperature and obscurity (video attached).

    Have you ever encountered this problem? What could be the cause of these wisps and flakes? How can I remove them?

    I tried solubilizers but the results were inconclusive.

    Thank you in advance for your help.




    Dr.Drey replied 3 weeks, 6 days ago 2 Members · 3 Replies
  • 3 Replies
  • Dr.Drey

    March 25, 2024 at 4:51 pm

    Please find attached a photo of flakes visible to the naked eye and a photo of a flake under an optical microscope (x100).

  • Paprik

    March 25, 2024 at 7:35 pm

    I believe the first question will be what is the final pH?

    • Dr.Drey

      March 25, 2024 at 11:06 pm

      Thank you for your reply.

      The final pH is 4.8 (spec : 4.5 < pH < 5.0).

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