Home Cosmetic Science Talk Formulating General Off Topic What is theBest ratio of surfactant:STTP in liquid laundry detergent if wash water is extremely hard

  • What is theBest ratio of surfactant:STTP in liquid laundry detergent if wash water is extremely hard

    Posted by Abdullah on November 29, 2022 at 5:46 am

    Which of these three combinations will work in terms of cleaning power if wash water is extremely hard?

    Formula A
    SLS powder in active 10% 
    STTP 5% 
    pH 11

    Formula B
    SLS power in active 7.5% 
    STPP 7.5% 
    pH 11 

    Formula C 
    SLS powder in active 5% 
    STPP 10% 
    pH 11 

    Or are you suggesting any other ratio of surfactant/STTP?

    Abdullah replied 1 year, 6 months ago 2 Members · 2 Replies
  • 2 Replies
  • ariepfadli

    Member
    November 30, 2022 at 7:02 pm

    STPP work as water hardness reducer by capture calcium and magnesium ion, to avoid reacting with your surfactant, so it’s not anti redeposition, just make to sure your surfactant can works
    more hard water more STPP,
    Just try maximum combination and you can see effectiveness by how much foam can be formed during application, more foam indicate more surfactant still works

  • Abdullah

    Member
    December 1, 2022 at 1:27 am

    STPP work as water hardness reducer by capture calcium and magnesium ion, to avoid reacting with your surfactant, so it’s not anti redeposition, just make to sure your surfactant can works
    more hard water more STPP,
    Just try maximum combination and you can see effectiveness by how much foam can be formed during application, more foam indicate more surfactant still works

    STPP is soluble up to 14% in water. Do you suggest i use 14% STPP?

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