The Aculon treatments result in a functionalized surface that is highly oleophobic. As can be seen from the graph below a treated parts is 8 times more oil repellent than an untreated part where oil would easily wick across the surface.
The skin of the lip forms the border between the exterior skin of the face, and the interior mucous membrane of the inside of the mouth. The lip skin is not hairy and does not have sweat glands. Therefore it does not have the usual protection layer of sweat and body oils which keep the skin smooth, inhibit pathogens, and regulate warmth.
Answered by The Community. Making the world better, one answer at a time. The inferior labial frenulum is the connective tissue connecting the bottom lip to the bottom gums in the mouth. They can be prone to pain or tearing depending on the individual. the upper labial frenulum is the little piece of skin on the inside of your upper lip. if you pull your lip up you can see it.