It consists of two layers of pastry separated by a thick cream layer. It serves encryption to higher layers, which is normally the function of the presentation layer. Reflection occurs at the ionospheric E layer or F layers. A white reflective alumina surface layer minimizes absorption. This creates a caramelized outer skin with a liquid, molten layer underneath. It is the remnant of the winter surface mixed layer. EVOH is used in multilayer films for packaging as a barrier layer (barrier plastic). The formation of this protective layer is called passivation. Such glazes are generated by sintering a compacted oxide layer. It adds an interface to the application layer. Some cheeses have aromatic molds on the rind, the outer layer, or throughout. The fiber consists of a core surrounded by a cladding layer. The roof was flat with a thick layer of clay over brushwood. JavaScript imposes an advertisement over a webpage in a transparent layer. The paper is placed in a container with a shallow layer of solvent and sealed.