A new method of constructing a gas panel is described which involves passivation of the outer surface of laminated electrical conductors disposed in parallel on glass plates which form a gas panel, spraying a slurry composed of a finely ground glass frit in a suspension vehicle to cover completely the laminated parallel lines on each glass plate, and firing the assembly in an oven to reflow the glass frit thereby to form a protective glass coating over the laminated parallel lines of each glass plate. The glass plates are formed into a panel by separating them a given distance, placing a sealing material between the glass plates around the periphery thereof, and firing the assembly in an oven to seal the glass plates together with a chamber therebetween which is evacuated and filled with an illuminable gas.