Inconsistent contact between substrate and irregular skin surfaces leads to non-uniform application or sampling. Precise dosage control ensures predictable cosmetic efficacy and diagnostic reliability.

Hydrophilic active ingredients degrade or react prematurely when stored in aqueous environments. Maintaining these ingredients in a dry form on a substrate prevents premature activation and extends shelf life.

Standard foam structures often trap viscous cosmetic formulas within their pores or degrade upon contact with solvents. Improving the release and transfer efficiency ensures consistent application and reduces material waste.