Foundation Primer Issues - Chemists Corner

Color and makeup

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 11 months, 2 weeks ago 4 Members · 6 Replies
6 Replies

paprik

Member
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

Member
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

Member
May 26, 2022 at 4:53 pm

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

Member
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

Member
May 26, 2022 at 6:20 pm

Thank you Paprik 😊
niecie2k

Member
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.

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