Cosmetics Formulation Development

Ask for advice. 1. That this mild preservative eco will be used as สารกันเสีย in water based Facial Mist/Spray approx. 90% or not, how many % do you recommend to put in other things in the formula? Glycerin e Essential Oil 2. And when you spray the spray with Mild Preservative Eco mixed on your face, what will happen to your eyes? 3. Facial Mist, I want to cool the face 2- 3 minutes, how much do you use to mix the face substance? It will feel cool and safe. Thank you.

Hello, 1% usage rate is safe. Can spray on the face. Consider Freeze Me