Preservatives for a Water-based Pomade
I have been learning about preservatives and I want to make sure that my preservative combination will cover all cases.
My current formula is 44% distilled water. My preservative is going to be 1% of the composition.
To make my preservative, I plan on mixing the combo with the following ratio:
Potassium Sorbate 20%
The reason why I’m using Potassium Sorbate is because it looks like Optiphen-plus is good at protecting against gram positive and negative bacteria, but isn’t so great at protecting against mould. Potassium Sorbate should cover the mould part - although it seems to be a pain to handle since I can only add it to my cooling phase at 38C because it’s unstable at higher temps.
I’ve read that propanediol enhances the efficacy of the other preservatives.
What do you think about the mixture above?
Also, if I were to sell my pomade, do I need to get it lab-tested? Also, is there a way for me to test it against bacteria and mould myself?