Serum Formulation Questions

Here are the answers to your questions regarding the serum formulation:

1. Does the mixing process require heat, and if so, at what temperature?

Based on the ingredients in your formula, heat is generally not required. The mixing process involves combining liquid oils and bases with water. These ingredients can typically be mixed effectively at room temperature with proper stirring or blending. The key is to follow the recommended mixing method for the Silky Serum Base Plus, which involves mixing the oil phase with the base first, and then gradually adding the water phase while stirring well.

2. Why does magnesium sulfate crystallize in the final step?

Magnesium Sulfate is a salt that needs to be fully dissolved in the water phase of your formulation. Adding it as a powder in the final step, after the serum texture has formed, is likely causing it to not dissolve completely, resulting in crystallization or undissolved particles. To prevent this, you should dissolve the Magnesium Sulfate in the water phase first before combining it with the oil/base mixture.

3. Will a preservative be needed in the formula?

Yes, a broad-spectrum preservative is necessary for this formula. Your serum contains a high percentage of water (65%) and Aloe Vera Gel, which create an environment susceptible to microbial growth (bacteria, mold, and yeast). While the Aloe Vera Gel base may contain a small amount of preservative, it is likely not sufficient to protect the entire formula. Adding a suitable preservative will help prevent contamination, ensure the safety of the product, and extend its shelf life.