Process and apparatus for producing alternate monomolecular layers

A process for the production of alternate monomolecular layers on at least one substrate, of the type in which the substrate is passed through the surface of a liquid contained in a vessel and over which has previously been spread a monomolecular layer of a given substrate, wherein the vessel is subdivided into at least two compartments, a monomolecular layer is deposited on the surface of the liquid contained in each of these compartments the latter being arranged in such a way that there can be no contact there between the monomolecular layers located in each of them and the substrate is alternately passed from one compartment to the other, transfer solely taking place within the liquid, or solely above the latter, or alternatively within the liquid or above the surface thereof.