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.
The upper lip is skin-covered, skin-colored, and hairy. The pink parts are called the upper and lower vermilion, the border between the skin and the vermilion is called the vermilion border, the wet, shiny inner portion of what people call the lips is called the wet vermilion or the mucosa.So, you see, Elliot has given you the accurate response. have found that the area circled in figure 2, the small indentation under the nose, is called the philtrum, which is what the many searches I have tried have yielded, but I cannot figure out what the entire area is called.