liquid foundation doesn't stick to the skin - Cosmetic Science Talk

liquid foundation doesn't stick to the skin

Hello every body
I am trying to make a simple water in silicone foundation with this materials:

water, cyclopentasiloxane, glycerin, cetyl dimethicone copolyol, phenyl trimethicone, trimethylsiloxysilicate,NaCl, silica, TiO2, iron oxides

My problem is that the foundation doesn't stick to the skin (or it doesn't dry as fast as it should)!

Does any body have any suggestion for me?


Comments

  • Yes. Remove the cyclo, it is now no longer a permitted ingredient except at extremely low levels.
    Special interests: anti-aging creams, gels, and serums; sulphate-free shampoos; and therapeutic cosmetics.
  • Replace D5 with DC AMS C30 WAX.
  • @Belassi do you know what is the best replacement for cylo?

    @DRBOB@VERDIENT.BIZ  I don't have  DC AMS C30 WAX  here, do you have any other suggestion for me?
  • edited October 12
    And I have another problem, it seems the color of the foundation changing during applying on skin!!!  
  • Use a small amount of xanthan gum ie 0.1% in water phase.
  • What agency has banned D5, and when was this decision made? I can't find anything on this. I know D4 was determined to be bad, but not D5.
    Robert Zonis, Sr. Formulation Chemist, Beaumont Products "All opinions and comments expressed are my own, have no relation to Beaumont Products, are fully copyrighted, and may not be used without written permission."
  • European regulations, there are some posts about it
    Special interests: anti-aging creams, gels, and serums; sulphate-free shampoos; and therapeutic cosmetics.
  • Thanks, Belassi. I've gotten out of the habit of paying attention to the EU, since I work for a US-only company.

    What about volatile dimethicone fluid? Is that still OK?

    If it is, it would be a good substitute for D5.

    Also, the trimethylsiloxysilicate is the film former/adhesion promoter. If the formula isn't sticking, increasing it would be the first thing I'd try. Using silicone-treated pigments would be the second thing.
    Robert Zonis, Sr. Formulation Chemist, Beaumont Products "All opinions and comments expressed are my own, have no relation to Beaumont Products, are fully copyrighted, and may not be used without written permission."
  • @Belassi which particular European regulations?
    UK based formulation chemist. Strongest subjects: hair styling, hair bleaches, hair dyes (oxidative and non-oxidative) I know some stuff about: EU regulations, emulsions (O/W and W/O), toothpaste, mouthwash, shampoos, other toiletries
  • Bill, there was a post on this a while ago that referenced the new regulations.
    Special interests: anti-aging creams, gels, and serums; sulphate-free shampoos; and therapeutic cosmetics.
  • edited October 14
    thank you all for your suggestions.
    and update: I used 0.1% xanthan  gum in water phase and also increased the amount of trimethylsiloxysilicate . but they don't help me as much as they should:
    the foundation doesn't stick enough to the skin and it doesn't dry as fast as it should and after a few time when I rub it again on the skin, the color changes (give me more coverage  :D )!!!!!!! 

    any other suggestion?  
  • Try DC FA 4103 silicone acrylates emulsion and add to water phase;may also help with coverage on skin.Add some ethanol to water phase to dry faster.
  • If your foundation changes color on skin, it always means that you haven't dispersed your pigments strongly enough. How are you grinding them into your product?
    Robert Zonis, Sr. Formulation Chemist, Beaumont Products "All opinions and comments expressed are my own, have no relation to Beaumont Products, are fully copyrighted, and may not be used without written permission."
  • edited October 14
    @Bobzchemist ; I grind the powders in a coffee grinder then add them to the oil phase and mix them and after that add the water phase.
  • That's not enough.

    Are you a hobbyist or a professional, and what country are you in?
    Robert Zonis, Sr. Formulation Chemist, Beaumont Products "All opinions and comments expressed are my own, have no relation to Beaumont Products, are fully copyrighted, and may not be used without written permission."
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