These Prohibition Signs should he used to convey “Do Not” type commands For example, to indicate ‘No Smoking’ a ‘No Smoking Sign’ is used or where a particular material reacts dangerously with water, “Water should not be used” sign. In the workplace they should be used to reinforce instructions prohibiting dangerous activities. Signs prohibiting an activity consist of a circular red band and single diagonal cross bar descending from left to right at an angle of 45 degrees. The background should be white with the pictogram indicating the nature of the command in black.
Shape: Circular (Angular or disc)
Colour: White and red borderline and oblique diametrical line