Cleansing Oil Formulation: Suitability, Rancidity Prevention, and Mixing

Regarding the oil-based makeup remover formula that transforms into milk upon contact with water, here are comments based on your formula and the staff's reply:

The staff suggested a modified formula, noting that Oilsify 15 is sufficient to achieve the oil-to-milk effect, making Oil Milk unnecessary. They also recommended using Essential Oil at a lower concentration (starting from 0.5-1.0% instead of 5%) as it can cause skin irritation.

The suggested modified formula is:

• Mineral Oil (heavy): Remaining percentage to reach 100%
• Oilsify 15: 15%
• LipidSoft™ Moist: 15%
• Essential Oil: 1% (or 0.5-1.0%)

Addressing your specific questions:

1. Is the formula usable, especially for oily skin?
   Yes, the formula is usable. However, for individuals with oily skin, cleansing water might be a preferred alternative to cleansing oil.

2. How to prevent natural oils from going rancid?
   To slow down rancidity when using natural oils, you can add antioxidants such as Vitamin E Acetate or Rosemary Extract. However, rancidity can still occur over time, especially with exposure to heat, light, or air. A more complete prevention method is to use modified natural oils like Olive CLEAR or Fractionated Coconut Oil, or naturally highly stable oils like Jojoba Oil, which are less prone to rancidity.

3. Suggest a refreshing essential oil scent.
   Scent preference is highly personal, and therefore, specific recommendations for a refreshing essential oil scent cannot be provided.

4. Can the formula be mixed manually or does it require equipment?
   This formula can be mixed manually by stirring the ingredients together with a spoon or suitable tool. A mixer is not necessary, but if used, it should be at a low speed.