Home Cosmetic Science Talk Formulating Help with formula, clay mask - preservative

  • Help with formula, clay mask - preservative

    Posted by okaforify on August 20, 2020 at 12:29 pm

    Hello everyone, 

    Thank you for letting me into the group. I wanted to get some help with a formula for a clay mask that I am developing. I know that clay masks are notoriously difficult to preserve, however, this is my passion and really want to get this right!

    This is the formula:

    A

    0.4% Xanthan gum

    0.1% citric acid

    0.1% vitamin A 

    4% Dipropylene glycol 

    4% Vegetable Glycerin

    B

    heat water to 50oC 

    40% Aqua 

    1% Panthenol

    C

    3% Rosa Demascena Flower Water

    5% Aloe barbadensis Juice

    2% Hamamelis virginiana 

    0.2% Tocopherol 

    0.1% Parfum

    0.2 Potassium Sorbate

    0.8% Benzyl Alcohol

    1% Phenoxyethanol

     2% Allantoin

    28% French Pink Clay

    1% Botanicals

    I wanted to know if this is a good formula and if it will preserve the clay with these percentages and method. Any tips improving how well the clay will preserve and any changes I need to make with the percentages.

    Thank you so much in advance! 

    okaforify replied 3 years, 6 months ago 2 Members · 2 Replies
  • 2 Replies
  • chemicalmatt

    Member
    August 20, 2020 at 9:01 pm

    @okaforify I’d call this well preserved given the water activity, as long as the final pH is <5.5 or that sorbate won’t do much good. A bit heavy if anything. With clay products it is always best to add the preservatives before the clays. Kaolin and other clays may adsorb certain preservatives such as benzyl alcohol.

  • okaforify

    Member
    August 20, 2020 at 10:20 pm

    @okaforify I’d call this well preserved given the water activity, as long as the final pH is <5.5 or that sorbate won’t do much good. A bit heavy if anything. With clay products it is always best to add the preservatives before the clays. Kaolin and other clays may adsorb certain preservatives such as benzyl alcohol.

    thank you for your help, what do you mean a bit heavy? as in there are too many ingredients in the mask?

    Ok great, I have been adding the preservatives in the water phase, so I’m hoping that’ll prevent bacteria/fungi! 

    thank you :) 

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