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Home Cosmetic Science Talk Formulating Color and makeup Foundation Primer Issues

  • Foundation Primer Issues

    Posted by Marcyb on May 25, 2022 at 8:36 pm

    Hello! I am just starting out making cosmetics and I made a foundation primer yesterday. I used it and it worked great but after sitting overnight, I noticed a tiny bit of separation starting at the top of the jar. My recipe is:

    13% Cyclopentasiloxane
    6.5% fractionated coconut oil
    9.5% argan oil
    6.5% silica microsperes
    64.5% silicone gel
    Does anyone have any suggestions on what might be causing the separation and what I can do to fix it?
    niecie2k replied 3 weeks, 3 days ago 4 Members · 6 Replies
  • 6 Replies
  • Paprik

    May 26, 2022 at 12:12 am

    You are mixing lipids and silicones. Different polarities. Nothing to hold them together. 

    That is what is wrong I think. You need some stabilizing agent to keep it together. 

  • ketchito

    May 26, 2022 at 11:58 am

    @Marcyb I agree with @Paprik. Perhaps you could try increasing viscosity a bit more? Not sure if it’ll fix the issue though.

  • Marcyb

    May 26, 2022 at 4:53 pm

    Thank you guys, much appreciated! Should I try E Wax NF?

  • Paprik

    May 26, 2022 at 6:10 pm

    E Wax NF is an O/W emulsifier. This won’t work. Plus you have no water, so you cannot create an emulsion. You need silicone or oil compatible stabiliser. Or both (?) I am not really sure, I have never done such a product. 
    You would need to experiment, or hopefully someone else will have an answer for this. :) 

  • Marcyb

    May 26, 2022 at 6:20 pm

    Thank you Paprik 😊

  • niecie2k

    May 5, 2023 at 1:17 pm

    cetyl dimethicone or sepgel or one of the gel emulsifiers i.e., gelmaker Rheo, from making cosmetics. Not too much though or you’ll get pilling.