Home Cosmetic Science Talk Formulating PH of product (help)

  • Rencelj

    Member
    December 3, 2014 at 6:53 am

    Thank you belassi for guides, will try it asap and let you know how will turn out. Bob, yes will try to use NaOH (10% solution) to thick carbomer. So best thing just to add to carbomer to achive ph of 5 - 5.5 right ? And than add oils in to it?

    Greg

  • belassi

    Member
    December 3, 2014 at 11:42 am

    @nasrins: Just the freeze-thaw test cycle and observation over time, that’s all.

  • Rencelj

    Member
    December 4, 2014 at 3:17 am

    What i found interesting is, i did as told and i must say i was really happy. But as soon as i add last ingredient-Hydroxypropyltrimonium Honey at 1% it brakes down thicknes. Probably react with carbomer. Can i avoid this somehow (not replacing carbomer/hoey quad)?

    Greg
  • Chemist77

    Member
    December 4, 2014 at 3:50 am

    You have an anionic cocktail and then you add something cationic, it is BOUND to happen.

  • Bobzchemist

    Member
    December 4, 2014 at 9:54 am

    @milliachemist is right, you can’t use cationics in your formula at all. Either the honeyquat has got to go, or you have to change your formula drastically.

  • nasrins

    Member
    December 4, 2014 at 3:53 pm

    @bobzchemist you mean every cationic ingredient is incompatible with carbomer?

  • Rencelj

    Member
    December 4, 2014 at 5:16 pm

    Hmm, honeyquad is nice for skin, but can be replaced with any other natural ingredient or will not make diference if i pull it out (for skin) ? Also will it make formula unstable or just less thicker ? if i leave it in formula ? 

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