Home Cosmetic Science Talk Formulating Skin Comedogenic Rating is accurate or NOT

  • ngarayeva001

    Member
    September 23, 2018 at 10:18 am

    @Sibech, this is my problem. Oils high in linoleic acid are nice and dry as @Dtdang mentioned but go rancid in a couple of months (in a lotion). And vitamin E doesn’t do much (I use both tocopherol and tocopheryl acetate, doesn’t help). Still looking for my way around it…

  • Dtdang

    Member
    September 23, 2018 at 1:17 pm

    @Sibech, thanks a lot for your valued inputs. I appreciate.
    I do not have experience on this area. But, I love it.
    I found that linoleic acid staying long without rancid if I use extra virgin coconut in the formula. So far up to 6 months, the cream still OK.
    One factor that I learned from @ngarayeva001 is coconut oil can clog pores.
    Luckily, I found babassu oil has same characters as coconut oil and doesn’t clog pore. 

  • ngarayeva001

    Member
    September 23, 2018 at 1:23 pm

    @Dtdang what I understood, it’s impossible to predict much by fatty acids composition (that would make life easier) I guess that there’s some true in comedogenic tables, but only as a high level guidance. I decided not to buy exotic oils anymore. By the way is babassu oil liquid? 

  • Dtdang

    Member
    September 23, 2018 at 1:42 pm

    @ngarayeva001, Babassu oil is not oil liquid. When you put it on the skin, it will smelt and absorb through skin.

  • Dtdang

    Member
    September 23, 2018 at 1:46 pm

    @ngarayeva001, we cannot calculate accuracy amount  of fatty acids on natural ingredients. But we can calculate [ lower, high] of each.
    “Grease Fall” concept is great for formulation.

  • ngarayeva001

    Member
    September 23, 2018 at 5:47 pm

    Thank you @Dtdang, that’s what I thought. It shouldn’t be liquid with  that much of saturated fats (word oil instead of butter confused me). Grease fall is a very interesting concept. I analyzed a couple of great commercial products after you shared that article. Seems like they follow it.

  • Dtdang

    Member
    September 23, 2018 at 6:16 pm

    @ngarayeva001, babassu oil is same as extra virgin coconut oil

    are you familiar with 470 stainless? I found the propellers that are made  from 470 stainless tech
    what is it and it is good as stainless steel?

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