How to thicken liquid soap
I am formulating a soap based liquid handwash with lauric, myristic and castor oil with KOH. I usually used HPMC as thickener and it works but not cost-effective. I also tried NaCI to thicken the liquid soap but sometimes it works, another time it doesn’t. Again NaCI inhibits lathering. So for an economical formula, what thickener can I use in my formula? Note that pH of formula is 9-11 when carbomer doesn’t work.
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