Floral Water Facial Spray: Preservation Needs & Ingredient Compatibility with Reservoir-Tech
Question
I have two questions regarding cosmetic formulation:
Regarding Reservoir-Tech, can water-soluble ingredients from categories other than whitening be used normally? Specifically, are the following whitening ingredients compatible with Reservoir-Tech:
- Tetrahydrocurcuminoids
- resveratol
- Oxyresveratrol
- Lemon Peel Extract
- Alpha Arbutin
If I use rose water or lavender water as the main base (around 80-100%) for a facial spray intended for hydration and refreshing throughout the day (with the remaining 0-20% being other nourishing ingredients), do I need to add a preservative?
Answer
Regarding Reservoir-Tech and whitening ingredients:
According to the staff's response, the specific whitening ingredients you mentioned (Tetrahydrocurcuminoids, resveratol, Oxyresveratrol, Lemon Peel Extract, Alpha Arbutin) have not been tested for compatibility with Reservoir-Tech. Therefore, it cannot be confirmed if they can be used effectively or if you will get the expected benefits when using them in a formula with Reservoir-Tech. However, water-soluble ingredients from other categories (not whitening) can be used normally with Reservoir-Tech.
Regarding rose water and lavender water as a base (80-100%):
Based on the staff's reply, you do not need to add an additional preservative if you use rose water or lavender water as the main base (80-100%), provided that the mixing process is clean and all equipment used is properly sterilized, for example, by spraying with alcohol before use.
Related Products Mentioned
Alpha Arbutin (Switzerland)
Lemon Peel Bioferment (Lemon Skin™)
สารสกัดมะหาด (Oxyresveratrol)
