Substance that turns milky when applied to skin and mixed with water

The substance you described, which turns milky when applied to the skin and mixed with water, is likely an emulsifier used in cleansing oil products.

Cleansing oils typically consist of a blend of oils and an emulsifier. When you massage the oil onto dry skin, it helps to dissolve makeup, dirt, and excess oil. When you add water, the emulsifier allows the oil and water to mix together, forming a milky emulsion. This milky mixture can then be easily rinsed away, taking the dissolved impurities with it.

At MySkinRecipes, we have emulsifiers specifically designed for creating cleansing oils that exhibit this milky transformation upon contact with water. These include:

• Oilsify 15
• Oilsify 30
• Oilsify Eco (Cleansing Oil Base)

These products are available for sale and can be used to formulate your own cleansing oil that provides the effect you described.