Determination of optimal cream formulation from long-term stability investigation using a surface response modelling

Area of Science:

• Cosmetic Science
• Materials Science

Background:

• Developing stable cosmetic emulsions requires careful control of formulation parameters.
• Understanding rheological properties is crucial for predicting emulsion stability and performance.

Purpose of the Study:

• To formulate a stable depilatory cream at ambient temperature using an experimental design.
• To investigate the long-term stability of emulsion formulations and identify optimal ingredient concentrations.
• To evaluate the effectiveness and tolerance of the optimized depilatory cream.

Main Methods:

• Preliminary optimization of operating parameters.
• Determination of rheological properties.
• Long-term stability testing of emulsion formulations.
• Application of experimental design with response surface modeling.
• Estimation of emulsion stability using characteristic parameters.

Main Results:

• An optimal region for formulation stability was identified.
• The main effects of formulation ingredients on stability were investigated.
• The optimized formulation demonstrated effectiveness and good tolerance for depilation.

Conclusions:

• An experimental design approach successfully yielded a stable depilatory cream formulation at ambient temperature.
• The study provides a robust method for optimizing cosmetic emulsions and understanding ingredient interactions.
• The developed depilatory cream is effective and well-tolerated, meeting the study's objectives.