Home Cosmetic Science Talk Formulating Pigment Dispersion in gel based formulation

  • Pigment Dispersion in gel based formulation

    Posted by PeiHoong on January 3, 2020 at 8:20 am

    Dear all, I’m currently developing a liquid blusher which is a water gel-based and I am having issue during counter matching…
    As you can see from the photo below, some of the pigment is not well dispersed and form colour line (yellow colour line as shown). 
    Here is my formulation:

    BASE

    WATER                                  q.s
    Carbopol Ultrez 10                0.40

    Glycerin                                4.00
    Sepinov EMT 10                    1.05

    Preservative                           0.70
    TEA                                        q.s

    COUNTER MATCH

    Squalane                               4.00 ( I have tried using other oils e.g:                                                                          CCTG, C12-15 Alkyl Benzoate)
    Pigment                                q.s
    (Form paste and disperse using 3 roller mill)

    Anyone can help if any problem with the formulation or the process please? 

    Thank you so much in advance.  

    PeiHoong replied 4 years, 5 months ago 2 Members · 6 Replies
  • 6 Replies
  • ngarayeva001

    Member
    January 3, 2020 at 1:21 pm

    I am not an expert in colour cosmetics and most of my attempts are failures. A question based on my mistakes: are your pigments coated with anything to make them hydrophobic (methicone)?

  • PeiHoong

    Member
    January 3, 2020 at 2:10 pm

    @ngarayeva001 no, not coated at all

  • ngarayeva001

    Member
    January 3, 2020 at 3:17 pm

    They will migrate to water then because they are not hydrophobic. I tried that many times. Commercial brands use coated pigments. I saw coated TiO2 on tkb trading but I have never seen coated oxides or other pigments on the DIY market. You would be much better off making this blusher anhydrous. Anhydrous formulations are much more “forgiving” especially if you can mix then during cool down.

  • ngarayeva001

    Member
    January 10, 2020 at 1:44 pm

    @PeiHoong hi there. One of the suppliers from which I buy ingredients has just brought in coated iron oxides. I don’t know if it’s helpful but since you are making colour cosmetics that might be handy:

    https://www.glamourcosmetics.it/it/pigmento-asl-red-2
    I have not seen coated iron oxides before. Coated TiO2 is sold by tkbtrading.
    https://tkbtrading.com/products/dimethicone-treated-titanium-dioxide-dt2o

  • PeiHoong

    Member
    January 12, 2020 at 4:15 pm

    @ngarayeva001  thanks for the introduction! It would be helpful to me~~

  • PeiHoong

    Member
    January 16, 2020 at 7:20 am

    @ngarayeva001 just an upate for you, the problem has been solved by add in wetting agent.  :)
    Thanks for you help all this while~

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