International Transport Regulations 25 1.5 Marking and Labelling Marking The UN number preceded by the letters "UN" shall be clearly and durably marked on each package. Dimension of the mark: – The UN number and the letters "UN" shall be at least 12 mm high – For packages of 30 litres capacity or less or of 30 kg maximum net mass, they shall be at least 6 mm in height and except for packages of 5 litres or 5 kg or less when they shall be of an appropriate size. Unpackaged article: • the marking shall be displayed on the article, on its cradle or on its handling, storage or launching device. Marking shall be readily visible and legible and shall be able to withstand open weather exposure without a substantial reduction in effectiveness; IMDG Code requires test of at least three months' immersion in the sea. Lead-acid Batteries UN 2794, BATTERIES, WET, FILLED WITH ACID UN 2800, BATTERIES, WET, NON SPILLABLE UN 2796, BATTERY FLUID, ACID Nickel-Cadmium Batteries UN 2795, BATTERIES, WET, FILLED WITH ALKALI UN 2800, BATTERIES, WET, NON SPILLABLE UN 2797, BATTERY FLUID, ALKALI Nickel-Metal Hydride Batteries UN 3496, BATTERIES, NICKEL-METAL HYDRIDE Sodium-Nickel Chloride Batteries UN 3292, BATTERIES, CONTAINING SODIUM or UN 3292, CELLS, CONTAINING SODIUM Labelling Labels shall be in the form of a square set at an angle of 45° (diamond-shaped) with minimum dimensions of 100 mm by 100 mm, except in the case of packages of such dimensions that they can only bear smaller labels. They shall have a line 5 mm inside the edge and running parallel with it. Labels shall be readily visible and legible and shall be able to withstand open weather exposure without a substantial reduction in effectiveness; IMDG Code requires test of at least three months' immersion in the sea. Overpack The lettering of the “OVERPACK” mark shall be at least 12 mm high. The mark shall be in an official language of the country of origin and also, if that language is not English, French or German, in English, French or German, unless agreements, if any, concluded between the countries concerned in the transport operation provide otherwise; The package shall be labelled and marked with the UN number for each item of dangerous goods contained in the overpack. Each applicable mark or label only needs to be applied once.
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