Abstract: Process for etching a nickel-polyester layered offset plate, which is made by electroless nickel-plating of polyester and subsequently coated on the nickel-layer by a photoresist layer. After exposure of the photoresist layer under a transparent master and development of the offset-plate, the offset-plate is etched by an aqueous etching solution containing copper(II) ions, as the only etching agent together with Cl.sup.- ions. An offset printing plate is prepared from the etched nickel-polyester layered plate. The nickel layer of the nickel-polyester layered plate is etched with the aqueous etching solution. The etching solution additionally contains:(a) a salt which is inert as against the nickel-polyester layered plate, or 10 to 40 weight percent of an organic solvent, which is miscible or nonmiscible with water and which is inert as against the nickel-polyester layered plate, and 60 to 90 weight percent of de-ionized water; and(b) a wetting agent or pyridine.

Abstract: A lubricant for metal strip, in particular metal strip made of aluminum or aluminum alloy, and used for packaging purposes, in particular for packaging foodstuffs. The lubricant contains the aluminum or magnesium salt of a saturated C.sub.11 to C.sub.19 monocarboxylic acid as its main constituent. The lubricant also contains a dispersing agent.

Abstract: A cell for fused-salt electrolysis for reducing alumina in the presence of cryolite to metallic aluminum. The cell includes an insulated tank having a carbon bottom, two rows of anode rods disposed on opposite sides of an anode carrier positioned in the longitudinal center plane, an exhaust gas-collecting duct extending at the longitudinal center between the two rows of anode and covers downwardly inclined from the outside of respective rows of anode rods to respective edges of the tank and provided at the outer longitudinal edge and the transverse edges with a skirt that extends to the respective edge of the tank. Each cover is hinged adjacent to its longitudinal edge adjacent to the anodes and at least at its corner portions to a support which extends along the row of anode rods. A carrying arm is secured to each end portion of the support and is pivoted at its other end to the anode carrier.

Abstract: A method for increasing the corrosion resistance of aluminum base alloys is disclosed. The alloys contain up to 2.0% by weight zinc, up to 5.0% by weight magnesium, less than 0.1% by weight iron, elements selected from the group consisting of cadmium, tin and lead, or any combination thereof, in amounts ranging from 0.05 to 0.3% by weight for each of cadmium and tin and from 0.01 to 0.15% by weight for lead, balance aluminum. These aluminum base alloys are particularly useful as anode material for primary electric cells. The aluminum alloys reduce the incidence of hydrogen gas evolution within the cells. The aluminum base alloys may also be utilized as anode material for uses other than primary cells.