I received a small sample of Sodium Polyglutamic Acid from CPKelco, of Atlanta - from their San Diego distribution centre. I need to use it sparingly in testing as I only have 10 grams of it.
I have been advised to use at 0.2%. When I compose a 500 ml/gram sample, I will use 1 gram of it. I was using HEC at 0.85% in my formula before I received the Sodium Polyglutamic Acid. Can the HEC and SPA be used togther effectively, or do they sort of become a repeat of one another? Can anyone advise me on how using two similar ingredients such as these will affect the humectant and emulsifying properties of my final formula?
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