Home Cosmetic Science Talk Formulating General Facial wash soap-based decreased viscosity after the period of time

  • Facial wash soap-based decreased viscosity after the period of time

    Posted by duyennguyen on November 26, 2018 at 3:45 pm

    Hello everyone, I have a trouble with my formula. My facial wash formula contain :
    - Potassium soap-based
    - Glycerin and saccharide as humectant
    - CAPB as foam booster
    Olive Oil PEG-7 Esters as emollient agent
    - PQ7 : conditioner and film former
    - Essential oil.
    Apperance of this product when it was just produced was paste. This formula isn’t seperated when stored at high temperature. However, its viscosity decreases after the period of time evenly can be pourable.
    Whoever know reason and solution, plz ?

    duyennguyen replied 5 years, 7 months ago 3 Members · 7 Replies
  • 7 Replies
  • Fekher

    November 26, 2018 at 5:45 pm

    @duyennguyen actually i faced same thing with a soap made by me and i notice that also transperency increased so my explication that by time saponification advanced and cause the formation of more glycerin wich decrease the viscosity and increase the transperency of soap.

  • duyennguyen

    November 28, 2018 at 12:50 am

    @Fekher Yes, glycerin play the role as humectant, also solvent in soap-based. I noticed that higher glycerin proportion caused lower viscosity at the first time (when it’s just produced not only for during time). How can I solve this problem because, when I decrease the proportion of glycerin, soap-based become harsh and cause dry skin ?

  • Fekher

    November 28, 2018 at 10:28 am

    @duyennguyen i guess that product is liquid soap ?

  • duyennguyen

    November 29, 2018 at 12:58 am

    @Fekher It isn’t really, product’s appearance is paste because it’s facial wash.

  • Fekher

    November 29, 2018 at 5:37 am

    @duyennguyen so i guess that cellulose gum can work for that product to give more viscosity.

  • DAS

    November 29, 2018 at 6:42 am

    Use sodium soap instead.

  • duyennguyen

    December 3, 2018 at 12:15 am

    Sodium soap used for soap bar because of their firm, however, I need soap-based with paste-appearance.

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