Formulating a "น้ำตบ" (Toner/Essence) with Ferments and Extracts

Hello! Regarding the "น้ำตบ" (toner/essence) formula you asked about, here is the information:

1. Can all these ingredients be mixed together?

   • The ingredients you listed, including Galactomyces Ferment Filtrate, Bifida Ferment Lysate, Licochalcone A (from Licorice Extract), DMI, and water, are generally common and compatible ingredients in water-based cosmetic formulations like toners or essences.
   • However, complete compatibility might depend on the specific details of each raw material from the supplier (e.g., concentration, form, or solvents/carriers included with the raw material). But in principle, these ingredients can be mixed together.
   • The proportions you specified (Galactomyces 50%, Bifida 10%) are relatively high concentrations, which may require considering suitability for your skin and individual response.

2. Can they be mixed without using heat?

   • Most of the ingredients you listed are highly water-soluble or already in liquid/solution form. Mixing can typically be done at normal room temperature without the need for heat.
   • Using heat might negatively affect some active ingredients, such as natural extracts or ferments, reducing their efficacy. Therefore, mixing without heat is generally a more suitable method.

3. Do other ingredients need to be added, such as preservatives, penetration enhancers, etc.?

   • Preservative: It is absolutely essential to add a preservative system to this formula. Since it is a water-based formula, it provides an excellent environment for microbial growth (bacteria, yeast, mold). Without a preservative, the product will spoil quickly and can be harmful to the skin. You should choose a preservative suitable for the formula and its pH level.
   • Penetration Enhancer: Your formula already includes DMI (Dimethyl Isosorbide) at 3%. DMI acts as both a solvent and helps enhance the delivery of active ingredients into the skin. Whether to add other penetration enhancers depends on the desired performance and skin feel, but DMI at 3% is already a reasonable amount to aid penetration.
   • Other considerations:
     • pH Adjustment: The pH of the final product should be measured and adjusted to a skin-friendly range (generally around 4.5-6.0) for formula stability and to avoid skin irritation.
     • Other Humectants: Ingredients like Glycerin, Panthenol, Sodium Hyaluronate can be considered to enhance the moisturizing properties of the toner.
     • Chelating Agent: Such as Disodium EDTA, can help improve formula stability and enhance preservative efficacy.

In summary, your proposed formula is a good base, but it is absolutely necessary to add a preservative system and you should check and adjust the pH.

I hope this information is helpful. If you have any further questions, feel free to ask!