Serum Formulation: Separation Issue with Silky Serum Base and Encapsulated Salicylic Acid
Question
I am making an under-eye serum. Initially, I considered using Hydroxyethyl Cellulose at 0.6% to create the serum texture and was concerned if Encapsulated Salicylic Acid would precipitate at this concentration.
However, when using Silky Serum Base or Silky Serum Base Plus for the serum texture, I experienced water separation when mixing the water phase into the base by stirring instead of blending. What is the recommended mixing procedure to prevent this separation and achieve high stability?
Answer
Regarding the separation issue in your under-eye serum formula, based on the previous conversation with our staff, the separation likely occurred because the water phase was stirred instead of blended into the Silky Serum Base. The staff recommended using a blender for sufficient mixing when adding the water phase to Silky Serum Base or Silky Serum Base Plus. Adequate blending helps ensure high stability of the formula and prevents separation over time.