The invention relates to a method of manufacturing a layer (7) over a surface (6) from a liquid or viscous plastic (8) which solidifies once the layer (7) is formed, characterized in that the plastic (8) is introduced in liquid or viscous form into a reservoir (2) of variable volume, at least part of the inner wall of which is defined by a portion of the said surface (6); the reservoir (2) and the surface (6) are moved relative to each other while simultaneously decreasing the volume of the reservoir (2) so as to compress the plastic (8) and make it flow through a passage (9) connecting two surface portions placed respectively inside and outside the reservoir (2), the rate of flow of the plastic (8) through the passage (9) being chosen so as to form a layer (7) over one of the said surface portions (6) whose thickness (e) is less than the height of the said passage (E). The invention also relates to a device using the method described above and to the objects obtained by this same method.

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