Patent ID: 8417474

Claim:
A method of product evaluation comprising the steps of: a) applying a substance to a surface of an artificial substrate to form a substance-coated surface; wherein the surface of the artificial substrate has a texture that mimics mammalian keratinous tissue; and wherein the surface of the artificial substrate demonstrates at least one physical property selected from the group consisting of: a total surface energy of from about 15 mJ/m 2 to about 50 mJ/m 2 , a polar component of the total surface energy of from about 0 mJ/m 2 to about 15 mJ/m 2 , a zeta-potential at a pH of about 5.0 of from about −30 mV to about 30 mV, and combinations thereof; and b) performing at least one analysis of the substance-coated surface.