Means used to mark different danger zones

摘要

The sheet (1) has two visually observable markings (2, 3) e.g. number, which are arranged on the sheet and are assigned to a classification of two danger zones i.e. explosion-prone zones, respectively. A third visually observable marking is arranged on the sheet and displays arrangement of the two danger zones relative to the sheet. The third visually observable marking comprises arrows (4a, 4b). The classification corresponds to degree of danger of the danger zones, where the three visually observable markings are luminescent. An independent claim is also included for a method for displaying danger zones.