Occlusive Product Evaluation
Occlusive products can be ingredients such as petrolatum, or formulations that combine an
occlusive ingredient with emulsive ingredients. Occlusive products act differently than emulsion
products. Rather than bringing water into the skin, they create a barrier, and are absorbed
into the skin as moisture rises to the surface. They provide a
"self-moisturizing" effect on the skin.
Initially, an occlusive product such as a petroleum jelly can create a barrier on the surface of the
skin that inhibits DPM measurement. This will result in below-baseline readings that, over time, rise
and surpass the untreated control. Though occlusive products and ingredients do not exhibit the extreme
hydration levels of the emulsion products, their effects may last longer. Many formulations contain a
combination of both.
Continuous testing has proven to be a highly effective way to evaluate and compare occlusive products.
This method enables the researcher to see change as well as the rate of change in the formulations as
a result of the twenty or thirty second occlusion of the sensor probe to the skin. This approach often provides
the researcher with more information than a static reading.
For additional information, please contact NOVA at firstname.lastname@example.org.
For research use only. Not for use in diagnostic procedures.