Unwanted chemical interactions take place on substrates through use or environmental influences. Substances can leach out of the substrate and jeopardize both the stability and resistance of the active agents. The permeation of gases and liquids in or through solids can also have a significant effect on their properties. Corrosion or other effects, for example, can lead to a considerable deterioration of the aesthetics, transparency and functionality. The application of a high-density, accurate functional barrier layer can counteract these negative processes and guarantee effective protection. The blocking effect suppresses the unwanted chemical interaction, thus improving the chemical resistance. Ingredients can be stored for longer periods and an adsorption of the active agents on the surfaces of the substrate is reduced. This effectively prevents substances from penetrating the surface into and out of the substrate.