A method of manufacturing a film (6) includes the following steps: a) a film-forming mixture containing at least one film-forming agent is prepared； b) a dose of the mixture is deposited in a cell (4) of a cellular substrate (2), the mixture having a viscosity ranging from 1 to 8000 mPa·s at the temperature of the film-forming mixture during the deposition； c) the mixture is cured so as to obtain a film (6)； and d) the cell (4) is closed off by a hermetic sealing element (3). A device (1) especially suitable for the method and a device intended to implement the method are also described.
