I want to make a Calamine type basic lotion, my formula for this is below:
Rose Hydrosol= 70.5 g
Xanthan Gum= 0.8g
Sodium Citrate= 0.5g
Glycerine = 5g
Calamine = 15g
Zinc Oxide = 5g
Bentonite = 3g
As the calamine, zinc and bentonite come in powder form would this need to be sterilized somehow before it is added to the formula?
In the original calamine formula Liquid Phenol is used but I don't want to use this. So I am unsure what preservative I could use for this.
Any help would greatly appreciated