How should I thin out a thick shampoo in production?
This was a basic cold process shampoo that the formulation chemist before me had where 0.5% sodium chloride, 0.10% citric acid, and 0.10% sodium hydroxide was to be added. This turned the shampoo into a thick gel with a pH of 10.8. I have brought the pH down with citric acid to a 7 but need to get it thinner. Any suggestions? Water doesn’t seem to be helping.
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