An endoscope comprising a shaft comprises an imaging system arranged in the shaft and an illuminating system which allows light emitted by a light source to emerge at the distal end of shaft, wherein the light source comprises at least one light emitting diode. A space filled with a gas bubble, which space stands in contact with the liquid in the containers, particularly a ring space or a separate container, is provided, in which the pressure of the gas bubble is regulated by supplying gas. The solvent by which both resins are solvated need not be the solvent used in the inks for either layer. Each cavity is configured to receive a foot from a similar pallet when nested therein. Other embodiments are described and claimed.