Home Cosmetic Science Talk Formulating What is this precipitation


  • What is this precipitation

    Posted by Abdullah on April 21, 2024 at 11:26 pm

    This is a car wash liquid that will be used directly without any further dilution. After one day there is some precipitation at the bottom of the bottle that will mix when shaked and precipitates again. Also the product is not clear <div>

    What is causing this precipitation, and how can i prevent it and how to make it clear?


    I use hard water for making this product and use STPP to make it soft.

    Formula in active surfactants

    SLS 0.4%

    SLES 0.5%

    Cocamide DEA 0.1%

    STPP 0.3%

    Caustic soda 0.02%

    Mixed in hard water

    pH 10

    Procedure: mixed STPP in 20% hot water, added SLS in powder form, added SLES in 20% diluted form, added cocamide DEA, then rest of the water at RT, then pH adjusted.


    Abdullah replied 3 weeks, 6 days ago 1 Member · 0 Replies
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