7.4 Mandatory signs
Mandatory signs are circular in shape. White symbol on a blue background. Usually accompanied by an explanatory text. Examples are listed below.Mandatory signDescription Eye protection must be worn. Hearing protection must be worn. Respiratory protection must be worn. Face protection must be worn. Protective clothing must be worn. Fire door - Keep closed. Secure gas cylinders of all sizes,whether
https://www.kc.lu.se/en/employee/general-safety-regulations/7-signs-and-symbols/74-mandatory-signs - 2025-07-25