2-Phase Cleansing Formulation Guide

A 2-phase cleanser is designed to effectively remove both water-soluble and oil-soluble impurities, such as makeup and sunscreen. It consists of two distinct layers: an oil phase and a water phase, which separate when left standing. Before use, the product is shaken to temporarily mix the two phases.

Formulation Components

Oil Phase

The oil phase is designed to dissolve oil-based makeup, sebum, and other oil-soluble residues. Key components include:

• Emulsifier: An emulsifier is crucial to allow the oil phase to mix with the water phase when shaken and to help the product rinse off cleanly with water. Oilsify 15 is a suitable emulsifier specifically designed for cleansing oils and eye makeup removers.
• Oil: This is the primary component for dissolving oil-soluble impurities. Common choices include Mineral Oil (available in various viscosities like Light or Very Light) or Isopropyl Myristate. The choice of oil can affect the feel and cleansing power.

Water Phase

The water phase typically contains water-soluble cleansing agents, humectants, and preservatives.

• Water: Purified water is the base of this phase.
• Cleansing Agent (Optional): Gentle water-soluble cleansing agents can be included to enhance the removal of water-soluble residues. MakeUp-Wash™ (PEG-6 Caprylic/Capric Glycerides) is a gentle option often used in micellar water formulations.
• Humectants (Optional): Ingredients like Glycerin or Butylene Glycol can be added to provide hydration and prevent the skin from feeling dry.
• Preservative: Essential to prevent microbial growth in the water phase.

Basic Guide Formulation Structure (Example)

This is a simplified guide. Actual percentages will require testing and adjustment based on desired performance and feel.

• Oil Phase (~40-60%):
  • Oil (e.g., Mineral Oil, Isopropyl Myristate): 30-50%
  • Emulsifier (e.g., Oilsify 15): 10-15%
• Water Phase (~40-60%):
  • Water: 40-55%
  • Cleansing Agent (Optional, e.g., MakeUp-Wash™): 1-5%
  • Humectant (Optional, e.g., Glycerin): 2-10%
  • Preservative: As per supplier recommendations

How it Works

When shaken, the emulsifier in the oil phase helps disperse the oil into the water phase temporarily. When applied to the skin, the oil phase dissolves makeup and impurities. Adding a little water during cleansing helps the emulsifier create a milky emulsion that can be easily rinsed away, taking the dissolved impurities with it.