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Home Cosmetic Science Talk Formulating Color and makeup sos change of color

  • sos change of color

    Posted by mayachem on October 2, 2018 at 1:21 pm

    I would really appreciate it if you could give any advice about a production issue that I came across.
    A simple recipe of a concealer stick, with carnauba wax, beeswax,ozokerite, paraffinum liquidum,castor oil, and pigments pre-despersed in castor oil.
    we unfortunately 3 months after the production, have complains that the color looks beige, but it relly writes like pink.
    I assume that we have oxidation, even if I used BHT and tocopherol..
    Any advice would be appreciated.

    marytsiang replied 4 years, 6 months ago 5 Members · 7 Replies
  • 7 Replies
  • Dr Catherine Pratt

    October 19, 2018 at 12:03 pm

    @mayachem, did you do a real time stability test? That can usually take about 3 months to do properly?

  • chemicalmatt

    October 21, 2018 at 10:18 pm

    Somewhat weird. Using only iron oxides?

  • EVchem

    October 22, 2018 at 1:21 pm

    If it looks different on the stick than on the hand, that doesn’t indicate oxidation to me. What about writing on paper or not-skin? Does the color also appear pink there?

  • Anonymous

    October 30, 2018 at 7:18 pm

    Did you mill it? Probably your red IO coming out.

  • Anonymous

    October 30, 2018 at 7:28 pm

    You can also buy pre dispersed pigments if you don’t have a mill.

  • Anonymous

    November 6, 2018 at 10:27 pm

    Have you cut a bullet up? This is very common when mixing iron oxides in castor oil and wax blends. Injection and cooling stage your red is sinking down in my opinion. I bet the bottom of the bullet will be less so.. 

  • marytsiang

    November 13, 2018 at 9:41 am

    @Tal025  what do you mean by injection and cooling stage?It is a filling process issue?