Home Cosmetic Science Talk Formulating Soft particles in a lotion

  • Soft particles in a lotion

    Posted by Merylin on December 2, 2020 at 2:10 pm

    Hello everyone, hope you are doing great! 

    I have a problem with my lotion. At first the lotion looks nice, no particles anywhere (only
    air bubbles) but after a month the particles are starting to show.  What could be causing this? Is it crystallization
    or Ostwald-Ripening? Or maybe just poor manufacturing (too much air getting in
    lotion while stirring)? The particles
    are soft and will dissapear after rubbing. I put a picture of the particles
    down below.

    Formula:

    Aqua 77.00%

    Coconut butter 12.00%
    Glyceryl stearate  1.0%
    Polyglyceryl-3 Distearate (and) Glyceryl Stearate Citrate  2.60%
    Xanthan gum    0.40%   
    Glycerin     7.00%
    Triethylcitrate, Glyceryl Caprylate, Benzoic Acid  1.00%

    Paprik replied 3 years, 11 months ago 3 Members · 3 Replies
  • 3 Replies
  • ketchito

    Member
    December 2, 2020 at 3:02 pm

    @Merylin Is was actually going to ask you if those particles are soft or hard. Since they are soft, they might be the coconut butter, which is not only hard to emulsify, but also is present in a very high amount in your formula. 

  • Merylin

    Member
    December 3, 2020 at 7:22 am

    @ketchito Thanks! Coconut would have been the last thing I could have blamed. I’m gonna lower the butter %.

  • Paprik

    Member
    December 3, 2020 at 6:15 pm

    Hey,

    yeah, I think the same thing. Coconut butter. The input is quite high and its melting point is quite low. Even in balms etc I wouldn’t go over 10% with most butters. 

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