Cosmetics Formulation Development

I mix it myself, here are the ingredients: Safe-B3 5% Licorice Extract 1% Rice Vitamin 2% Willow Bark Extract 10% Vitamin B6 2.5% Zinc PCA 1% Ethoxydiglycol 5% Witch Hazel Plus Allantoin 100% complete Phenoxyethanol SA 0.5% After about 20 days the toner will begin to crystallize at the bottom of the bottle. I want to know which ingredients such crystals are made of. and in this formula there is no น้ำกลั่น as an ingredient, omit สารกันเสีย ?

Hello, the team is expected from Zinc PCA by Zinc PCA cannot match multiple ingredients. and when left for a long time It is often found that sedimentation occurs. The mixed recipe can still be used normally No need to leave But the performance may be reduced somewhat. from the precipitated mixture

will not enter สารกันเสีย or not

formula This is optional สารกันเสีย because most of the components are Witch Hazel Plus Allantoin which contains สารกันเสีย is already a component. so you don't have to put สารกันเสีย in the recipe, add more.