What factors influence penetration?
• The thickness of stratum corneum • Excessive oil on the skin • Temperature of the skin • Molecular size of the active ingredients Basic cosmetic products’ functions • Cleaners: • Remove make-up, excess oil, pollutants and bacteria. • Achieve a clean healthy, glowing skin • Toners: • Balance the PH of skin. • Restore the skin ‘s natural acid mantle (skin’s PH is about 4.5-6). • Allow easier application and better penetration of moisturizing products. • Leave skin feeling fresh. • Remove last traces of make-up, bacteria and cleanser residue. • Moisturizers: • Add additional moisture to the skin • Seal in moisture and prevent the escape of natural moisture • Attract the moisture from the air • Soften and smooth the texture of the skin and provide a smooth surface for make-up • Help protect the skin from damage by stress, abuse, air pollution and dry air from central heating and air conditioning. • Help oily skin balance water and oil within the skin and on its surface • Prevent the skin
