Optimal Formula of "Oil in Water" Blending Oil in Water Blending is a process that comes up with smooth texture by distributing oil throughout water-based ingredients. Water covers up oil's surface, providing moist and soft texture at the same time. To protect skin and maintain pH balance of skin, we adjusted pH level to low and made it hypoallergenic. If you're having trouble finding a mild cream that adheres to its original purpose, we'd confidently recommend Madagascar Centella Cream.